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OPT is just # for debug/optimization stuff. BASECFLAGS is for flags that are required # just to get things to compile and link. Users are free to override OPT # when running configure or make. The build should not break if they do. # BASECFLAGS should generally not be messed with, however. # If the user switches compilers, we can't believe the cache if test ! -z "$ac_cv_prog_CC" -a ! -z "$CC" -a "$CC" != "$ac_cv_prog_CC" then AC_MSG_ERROR([cached CC is different -- throw away $cache_file (it is also a good idea to do 'make clean' before compiling)]) fi # Don't let AC_PROG_CC set the default CFLAGS. It normally sets -g -O2 # when the compiler supports them, but we don't always want -O2, and # we set -g later. if test -z "$CFLAGS"; then CFLAGS= fi dnl Emscripten SDK and WASI SDK default to wasm32. dnl On Emscripten use MEMORY64 setting to build target wasm64-emscripten. dnl for wasm64. 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AS_CASE([$ac_sys_system], [iOS], [ AS_VAR_APPEND([CFLAGS], [" -mios-version-min=${IPHONEOS_DEPLOYMENT_TARGET}"]) AS_VAR_APPEND([LDFLAGS], [" -mios-version-min=${IPHONEOS_DEPLOYMENT_TARGET}"]) ], ) if test "$ac_sys_system" = "Darwin" then dnl look for SDKROOT AC_CHECK_PROG([HAS_XCRUN], [xcrun], [yes], [missing]) AC_MSG_CHECKING([macOS SDKROOT]) if test -z "$SDKROOT"; then dnl SDKROOT not set if test "$HAS_XCRUN" = "yes"; then dnl detect with Xcode SDKROOT=$(xcrun --show-sdk-path) else dnl default to root SDKROOT="/" fi fi AC_MSG_RESULT([$SDKROOT]) # Compiler selection on MacOSX is more complicated than # AC_PROG_CC can handle, see Mac/README for more # information if test -z "${CC}" then found_gcc= found_clang= as_save_IFS=$IFS; IFS=: for as_dir in $PATH do IFS=$as_save_IFS if test -x "${as_dir}/gcc"; then if test -z "${found_gcc}"; then found_gcc="${as_dir}/gcc" fi fi if test -x "${as_dir}/clang"; then if test -z "${found_clang}"; then found_clang="${as_dir}/clang" fi fi done IFS=$as_save_IFS if test -n "$found_gcc" -a -n "$found_clang" then if test -n "`"$found_gcc" --version | grep llvm-gcc`" then AC_MSG_NOTICE([Detected llvm-gcc, falling back to clang]) CC="$found_clang" CXX="$found_clang++" fi elif test -z "$found_gcc" -a -n "$found_clang" then AC_MSG_NOTICE([No GCC found, use CLANG]) CC="$found_clang" CXX="$found_clang++" elif test -z "$found_gcc" -a -z "$found_clang" then found_clang=`/usr/bin/xcrun -find clang 2>/dev/null` if test -n "${found_clang}" then AC_MSG_NOTICE([Using clang from Xcode.app]) CC="${found_clang}" CXX="`/usr/bin/xcrun -find clang++`" # else: use default behaviour fi fi fi fi AC_PROG_CC AC_PROG_CPP AC_PROG_GREP AC_PROG_SED AC_PROG_EGREP dnl detect compiler name dnl check for xlc before clang, newer xlc's can use clang as frontend. dnl check for GCC last, other compilers set __GNUC__, too. dnl msvc is listed for completeness. AC_CACHE_CHECK([for CC compiler name], [ac_cv_cc_name], [ cat > conftest.c <conftest.out 2>/dev/null; then ac_cv_cc_name=`grep -v '^#' conftest.out | grep -v '^ *$' | tr -d ' '` if test $(expr "//$CC" : '.*/\(.*\)') = "mpicc"; then ac_cv_cc_name="mpicc" fi else ac_cv_cc_name="unknown" fi rm -f conftest.c conftest.out ]) # checks for UNIX variants that set C preprocessor variables # may set _GNU_SOURCE, __EXTENSIONS__, _POSIX_PTHREAD_SEMANTICS, # _POSIX_SOURCE, _POSIX_1_SOURCE, and more AC_USE_SYSTEM_EXTENSIONS AC_CACHE_CHECK([for GCC compatible compiler], [ac_cv_gcc_compat], [AC_PREPROC_IFELSE([AC_LANG_SOURCE([ #if !defined(__GNUC__) #error "not GCC compatible" #else /* GCC compatible! */ #endif ], [])], [ac_cv_gcc_compat=yes], [ac_cv_gcc_compat=no])]) AC_SUBST([CXX]) preset_cxx="$CXX" if test -z "$CXX" then case "$CC" in gcc) AC_PATH_TOOL([CXX], [g++], [g++], [notfound]) ;; cc) AC_PATH_TOOL([CXX], [c++], [c++], [notfound]) ;; clang|*/clang) AC_PATH_TOOL([CXX], [clang++], [clang++], [notfound]) ;; icc|*/icc) AC_PATH_TOOL([CXX], [icpc], [icpc], [notfound]) ;; esac if test "$CXX" = "notfound" then CXX="" fi fi if test -z "$CXX" then AC_CHECK_TOOLS([CXX], [$CCC c++ g++ gcc CC cxx cc++ cl], [notfound]) if test "$CXX" = "notfound" then CXX="" fi fi if test "$preset_cxx" != "$CXX" then AC_MSG_NOTICE([ By default, distutils will build C++ extension modules with "$CXX". If this is not intended, then set CXX on the configure command line. ]) fi AC_MSG_CHECKING([for the platform triplet based on compiler characteristics]) if $CPP $CPPFLAGS $srcdir/Misc/platform_triplet.c >conftest.out 2>/dev/null; then PLATFORM_TRIPLET=`grep '^PLATFORM_TRIPLET=' conftest.out | tr -d ' '` PLATFORM_TRIPLET="${PLATFORM_TRIPLET@%:@PLATFORM_TRIPLET=}" AC_MSG_RESULT([$PLATFORM_TRIPLET]) else AC_MSG_RESULT([none]) fi rm -f conftest.out dnl On some platforms, using a true "triplet" for MULTIARCH would be redundant. dnl For example, `arm64-apple-darwin` is redundant, because there isn't a dnl non-Apple Darwin. Including the CPU architecture can also be potentially dnl redundant - on macOS, for example, it's possible to do a single compile dnl pass that includes multiple architectures, so it would be misleading for dnl MULTIARCH (and thus the sysconfigdata module name) to include a single CPU dnl architecture. PLATFORM_TRIPLET will be a pair or single value for these dnl platforms. AC_MSG_CHECKING([for multiarch]) AS_CASE([$ac_sys_system], [Darwin*], [MULTIARCH=""], [iOS], [MULTIARCH=""], [FreeBSD*], [MULTIARCH=""], [MULTIARCH=$($CC --print-multiarch 2>/dev/null)] ) AC_SUBST([MULTIARCH]) if test x$PLATFORM_TRIPLET != x && test x$MULTIARCH != x; then if test x$PLATFORM_TRIPLET != x$MULTIARCH; then AC_MSG_ERROR([internal configure error for the platform triplet, please file a bug report]) fi elif test x$PLATFORM_TRIPLET != x && test x$MULTIARCH = x; then MULTIARCH=$PLATFORM_TRIPLET fi AC_SUBST([PLATFORM_TRIPLET]) AC_MSG_RESULT([$MULTIARCH]) dnl Even if we *do* include the CPU architecture in the MULTIARCH value, some dnl platforms don't need the CPU architecture in the SOABI tag. These platforms dnl will have multiple sysconfig modules (one for each CPU architecture), but dnl use a single "fat" binary at runtime. SOABI_PLATFORM is the component of dnl the PLATFORM_TRIPLET that will be used in binary module extensions. AS_CASE([$ac_sys_system], [iOS], [SOABI_PLATFORM=`echo "$PLATFORM_TRIPLET" | cut -d '-' -f2`], [SOABI_PLATFORM=$PLATFORM_TRIPLET] ) if test x$MULTIARCH != x; then MULTIARCH_CPPFLAGS="-DMULTIARCH=\\\"$MULTIARCH\\\"" fi AC_SUBST([MULTIARCH_CPPFLAGS]) dnl Support tiers according to https://peps.python.org/pep-0011/ dnl dnl NOTE: Windows support tiers are defined in PC/pyconfig.h. dnl AC_MSG_CHECKING([for PEP 11 support tier]) AS_CASE([$host/$ac_cv_cc_name], [x86_64-*-linux-gnu/gcc], [PY_SUPPORT_TIER=1], dnl Linux on AMD64, any vendor, glibc, gcc [x86_64-apple-darwin*/clang], [PY_SUPPORT_TIER=1], dnl macOS on Intel, any version [aarch64-apple-darwin*/clang], [PY_SUPPORT_TIER=1], dnl macOS on M1, any version [i686-pc-windows-msvc/msvc], [PY_SUPPORT_TIER=1], dnl 32bit Windows on Intel, MSVC [x86_64-pc-windows-msvc/msvc], [PY_SUPPORT_TIER=1], dnl 64bit Windows on AMD64, MSVC [aarch64-*-linux-gnu/gcc], [PY_SUPPORT_TIER=2], dnl Linux ARM64, glibc, gcc+clang [aarch64-*-linux-gnu/clang], [PY_SUPPORT_TIER=2], [powerpc64le-*-linux-gnu/gcc], [PY_SUPPORT_TIER=2], dnl Linux on PPC64 little endian, glibc, gcc [wasm32-unknown-wasi/clang], [PY_SUPPORT_TIER=2], dnl WebAssembly System Interface, clang [x86_64-*-linux-gnu/clang], [PY_SUPPORT_TIER=2], dnl Linux on AMD64, any vendor, glibc, clang [aarch64-pc-windows-msvc/msvc], [PY_SUPPORT_TIER=3], dnl Windows ARM64, MSVC [armv7l-*-linux-gnueabihf/gcc], [PY_SUPPORT_TIER=3], dnl ARMv7 LE with hardware floats, any vendor, glibc, gcc [powerpc64le-*-linux-gnu/clang], [PY_SUPPORT_TIER=3], dnl Linux on PPC64 little endian, glibc, clang [s390x-*-linux-gnu/gcc], [PY_SUPPORT_TIER=3], dnl Linux on 64bit s390x (big endian), glibc, gcc [x86_64-*-freebsd*/clang], [PY_SUPPORT_TIER=3], dnl FreeBSD on AMD64 [aarch64-apple-ios*-simulator/clang], [PY_SUPPORT_TIER=3], dnl iOS Simulator on arm64 [aarch64-apple-ios*/clang], [PY_SUPPORT_TIER=3], dnl iOS on ARM64 [aarch64-*-linux-android/clang], [PY_SUPPORT_TIER=3], dnl Android on ARM64 [x86_64-*-linux-android/clang], [PY_SUPPORT_TIER=3], dnl Android on AMD64 [PY_SUPPORT_TIER=0] ) AS_CASE([$PY_SUPPORT_TIER], [1], [AC_MSG_RESULT([$host/$ac_cv_cc_name has tier 1 (supported)])], [2], [AC_MSG_RESULT([$host/$ac_cv_cc_name has tier 2 (supported)])], [3], [AC_MSG_RESULT([$host/$ac_cv_cc_name has tier 3 (partially supported)])], [AC_MSG_WARN([$host/$ac_cv_cc_name is not supported])] ) AC_DEFINE_UNQUOTED([PY_SUPPORT_TIER], [$PY_SUPPORT_TIER], [PEP 11 Support tier (1, 2, 3 or 0 for unsupported)]) AC_CACHE_CHECK([for -Wl,--no-as-needed], [ac_cv_wl_no_as_needed], [ save_LDFLAGS="$LDFLAGS" AS_VAR_APPEND([LDFLAGS], [" -Wl,--no-as-needed"]) AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[]])], [NO_AS_NEEDED="-Wl,--no-as-needed" ac_cv_wl_no_as_needed=yes], [NO_AS_NEEDED="" ac_cv_wl_no_as_needed=no]) LDFLAGS="$save_LDFLAGS" ]) AC_SUBST([NO_AS_NEEDED]) AC_MSG_CHECKING([for the Android API level]) cat > conftest.c <conftest.out 2>/dev/null; then ANDROID_API_LEVEL=`sed -n -e '/__ANDROID_API__/d' -e 's/^android_api = //p' conftest.out` _arm_arch=`sed -n -e '/__ARM_ARCH/d' -e 's/^arm_arch = //p' conftest.out` AC_MSG_RESULT([$ANDROID_API_LEVEL]) if test -z "$ANDROID_API_LEVEL"; then AC_MSG_ERROR([Fatal: you must define __ANDROID_API__]) fi AC_DEFINE_UNQUOTED([ANDROID_API_LEVEL], [$ANDROID_API_LEVEL], [The Android API level.]) # For __android_log_write() in Python/pylifecycle.c. 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Detached sybmols and map prohibit some dnl optimizations and increase file size. Options are undocumented so we dnl are free to remove them in the future. [browser-debug], [ac_sys_emscripten_target=browser-debug], [node-debug], [ac_sys_emscripten_target=node-debug], [AC_MSG_ERROR([Invalid argument: --with-emscripten-target=browser|node])] ) ], [ AC_MSG_ERROR([--with-emscripten-target only applies to Emscripten]) ]) ], [ AS_VAR_IF([ac_sys_system], [Emscripten], [ac_sys_emscripten_target=browser]) ]) AC_MSG_RESULT([$ac_sys_emscripten_target]) dnl On Emscripten dlopen() requires -s MAIN_MODULE and -fPIC. The flags dnl disables dead code elimination and increases the size of the WASM module dnl by about 1.5 to 2MB. 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For OOT builds add the dnl directory containing _sysconfigdata to PYTHONPATH. [WASI/*], [HOSTRUNNER='wasmtime run --wasm max-wasm-stack=16777216 --wasi preview2 --env PYTHONPATH=/$(shell realpath --relative-to $(abs_srcdir) $(abs_builddir))/$(shell cat pybuilddir.txt):/Lib --dir $(srcdir)::/'], [HOSTRUNNER=''] ) fi AC_SUBST([HOSTRUNNER]) AC_MSG_RESULT([$HOSTRUNNER]) if test -n "$HOSTRUNNER"; then dnl Pass hostrunner variable as env var in order to expand shell expressions. 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Too many toolchains do not # compile working code using it and both test_distutils and test_gdb are # broken when you do manage to get a toolchain that works with it. People # who want LTO need to use --with-lto themselves. DEF_MAKE_ALL_RULE="profile-opt" REQUIRE_PGO="yes" DEF_MAKE_RULE="build_all" case $CC in *gcc*) AX_CHECK_COMPILE_FLAG([-fno-semantic-interposition],[ CFLAGS_NODIST="$CFLAGS_NODIST -fno-semantic-interposition" LDFLAGS_NODIST="$LDFLAGS_NODIST -fno-semantic-interposition" ], [], [-Werror]) ;; esac elif test "$ac_sys_system" = "Emscripten" -o "$ac_sys_system" = "WASI"; then dnl Emscripten does not support shared extensions yet. Build dnl "python.[js,wasm]", "pybuilddir.txt", and "platform" files. 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AS_VAR_SET([CC_BASENAME], [$(expr "//$CC" : '.*/\(.*\)')]) case "$CC_BASENAME" in *clang*) # Any changes made here should be reflected in the GCC+Darwin case below PGO_PROF_GEN_FLAG="-fprofile-instr-generate" PGO_PROF_USE_FLAG="-fprofile-instr-use=\"\$(shell pwd)/code.profclangd\"" LLVM_PROF_MERGER=m4_normalize(" ${LLVM_PROFDATA} merge -output=\"\$(shell pwd)/code.profclangd\" \"\$(shell pwd)\"/*.profclangr ") LLVM_PROF_FILE="LLVM_PROFILE_FILE=\"\$(shell pwd)/code-%p.profclangr\"" if test $LLVM_PROF_FOUND = not-found then LLVM_PROF_ERR=yes if test "${REQUIRE_PGO}" = "yes" then AC_MSG_ERROR([llvm-profdata is required for a --enable-optimizations build but could not be found.]) fi fi ;; *gcc*) case $ac_sys_system in Darwin*) PGO_PROF_GEN_FLAG="-fprofile-instr-generate" PGO_PROF_USE_FLAG="-fprofile-instr-use=\"\$(shell pwd)/code.profclangd\"" LLVM_PROF_MERGER=m4_normalize(" ${LLVM_PROFDATA} merge -output=\"\$(shell pwd)/code.profclangd\" \"\$(shell pwd)\"/*.profclangr ") LLVM_PROF_FILE="LLVM_PROFILE_FILE=\"\$(shell pwd)/code-%p.profclangr\"" if test "${LLVM_PROF_FOUND}" = "not-found" then LLVM_PROF_ERR=yes if test "${REQUIRE_PGO}" = "yes" then AC_MSG_ERROR([llvm-profdata is required for a --enable-optimizations build but could not be found.]) fi fi ;; *) PGO_PROF_GEN_FLAG="-fprofile-generate" PGO_PROF_USE_FLAG="-fprofile-use -fprofile-correction" LLVM_PROF_MERGER="true" LLVM_PROF_FILE="" ;; esac ;; *icc*) PGO_PROF_GEN_FLAG="-prof-gen" PGO_PROF_USE_FLAG="-prof-use" LLVM_PROF_MERGER="true" LLVM_PROF_FILE="" ;; esac # BOLT optimization. Always configured after PGO since it always runs after PGO. Py_BOLT='false' AC_MSG_CHECKING([for --enable-bolt]) AC_ARG_ENABLE([bolt], [AS_HELP_STRING( [--enable-bolt], [enable usage of the llvm-bolt post-link optimizer (default is no)])], [ if test "$enableval" != no then Py_BOLT='true' AC_MSG_RESULT([yes]); else Py_BOLT='false' AC_MSG_RESULT([no]); fi], [AC_MSG_RESULT([no])]) AC_SUBST([PREBOLT_RULE]) if test "$Py_BOLT" = 'true' ; then PREBOLT_RULE="${DEF_MAKE_ALL_RULE}" DEF_MAKE_ALL_RULE="bolt-opt" DEF_MAKE_RULE="build_all" # -fno-reorder-blocks-and-partition is required for bolt to work. # Possibly GCC only. AX_CHECK_COMPILE_FLAG([-fno-reorder-blocks-and-partition],[ CFLAGS_NODIST="$CFLAGS_NODIST -fno-reorder-blocks-and-partition" ]) # These flags are required for bolt to work: LDFLAGS_NODIST="$LDFLAGS_NODIST -Wl,--emit-relocs" # These flags are required to get good performance from bolt: CFLAGS_NODIST="$CFLAGS_NODIST -fno-pie" # We want to add these no-pie flags to linking executables but not shared libraries: LINKCC="$LINKCC -fno-pie -no-pie" AC_SUBST([LLVM_BOLT]) AC_PATH_TOOL([LLVM_BOLT], [llvm-bolt], [''], [${llvm_path}]) if test -n "${LLVM_BOLT}" -a -x "${LLVM_BOLT}" then AC_MSG_RESULT(["Found llvm-bolt"]) else AC_MSG_ERROR([llvm-bolt is required for a --enable-bolt build but could not be found.]) fi AC_SUBST([MERGE_FDATA]) AC_PATH_TOOL([MERGE_FDATA], [merge-fdata], [''], [${llvm_path}]) if test -n "${MERGE_FDATA}" -a -x "${MERGE_FDATA}" then AC_MSG_RESULT(["Found merge-fdata"]) else AC_MSG_ERROR([merge-fdata is required for a --enable-bolt build but could not be found.]) fi fi dnl Enable BOLT of libpython if built. AC_SUBST([BOLT_BINARIES]) BOLT_BINARIES='$(BUILDPYTHON)' AS_VAR_IF([enable_shared], [yes], [ BOLT_BINARIES="${BOLT_BINARIES} \$(INSTSONAME)" ]) AC_ARG_VAR( [BOLT_INSTRUMENT_FLAGS], [Arguments to llvm-bolt when instrumenting binaries] ) AC_MSG_CHECKING([BOLT_INSTRUMENT_FLAGS]) if test -z "${BOLT_INSTRUMENT_FLAGS}" then BOLT_INSTRUMENT_FLAGS= fi AC_MSG_RESULT([$BOLT_INSTRUMENT_FLAGS]) AC_ARG_VAR( [BOLT_APPLY_FLAGS], [Arguments to llvm-bolt when creating a BOLT optimized binary] ) AC_MSG_CHECKING([BOLT_APPLY_FLAGS]) if test -z "${BOLT_APPLY_FLAGS}" then AS_VAR_SET( [BOLT_APPLY_FLAGS], [m4_normalize(" -update-debug-sections -reorder-blocks=ext-tsp -reorder-functions=hfsort+ -split-functions -icf=1 -inline-all -split-eh -reorder-functions-use-hot-size -peepholes=none -jump-tables=aggressive -inline-ap -indirect-call-promotion=all -dyno-stats -use-gnu-stack -frame-opt=hot ")] ) fi AC_MSG_RESULT([$BOLT_APPLY_FLAGS]) # XXX Shouldn't the code above that fiddles with BASECFLAGS and OPT be # merged with this chunk of code? # Optimizer/debugger flags # ------------------------ # (The following bit of code is complicated enough - please keep things # indented properly. Just pretend you're editing Python code. ;-) # There are two parallel sets of case statements below, one that checks to # see if OPT was set and one that does BASECFLAGS setting based upon # compiler and platform. BASECFLAGS tweaks need to be made even if the # user set OPT. case $CC in *clang*) cc_is_clang=1 ;; *) if $CC --version 2>&1 | grep -q clang then cc_is_clang=1 else cc_is_clang= fi esac dnl Historically, some of our code assumed that signed integer overflow dnl is defined behaviour via twos-complement. dnl Set STRICT_OVERFLOW_CFLAGS and NO_STRICT_OVERFLOW_CFLAGS depending on compiler support. dnl Pass the latter to modules that depend on such behaviour. _SAVE_VAR([CFLAGS]) CFLAGS="-fstrict-overflow -fno-strict-overflow" AC_CACHE_CHECK([if $CC supports -fstrict-overflow and -fno-strict-overflow], [ac_cv_cc_supports_fstrict_overflow], AC_COMPILE_IFELSE( [AC_LANG_PROGRAM([[]], [[]])], [ac_cv_cc_supports_fstrict_overflow=yes], [ac_cv_cc_supports_fstrict_overflow=no] ) ) _RESTORE_VAR([CFLAGS]) AS_VAR_IF([ac_cv_cc_supports_fstrict_overflow], [yes], [STRICT_OVERFLOW_CFLAGS="-fstrict-overflow" NO_STRICT_OVERFLOW_CFLAGS="-fno-strict-overflow"], [STRICT_OVERFLOW_CFLAGS="" NO_STRICT_OVERFLOW_CFLAGS=""]) AC_MSG_CHECKING([for --with-strict-overflow]) AC_ARG_WITH([strict-overflow], AS_HELP_STRING( [--with-strict-overflow], [if 'yes', add -fstrict-overflow to CFLAGS, else add -fno-strict-overflow (default is no)] ), [ AS_VAR_IF( [ac_cv_cc_supports_fstrict_overflow], [no], [AC_MSG_WARN([--with-strict-overflow=yes requires a compiler that supports -fstrict-overflow])], [] ) ], [with_strict_overflow=no] ) AC_MSG_RESULT([$with_strict_overflow]) # Check if CC supports -Og optimization level _SAVE_VAR([CFLAGS]) CFLAGS="-Og" AC_CACHE_CHECK([if $CC supports -Og optimization level], [ac_cv_cc_supports_og], AC_COMPILE_IFELSE( [ AC_LANG_PROGRAM([[]], [[]]) ],[ ac_cv_cc_supports_og=yes ],[ ac_cv_cc_supports_og=no ]) ) _RESTORE_VAR([CFLAGS]) # Optimization messes up debuggers, so turn it off for # debug builds. PYDEBUG_CFLAGS="-O0" AS_VAR_IF([ac_cv_cc_supports_og], [yes], [PYDEBUG_CFLAGS="-Og"]) # gh-120688: WASI uses -O3 in debug mode to support more recursive calls if test "$ac_sys_system" = "WASI"; then PYDEBUG_CFLAGS="-O3" fi # tweak OPT based on compiler and platform, only if the user didn't set # it on the command line AC_SUBST([OPT]) AC_SUBST([CFLAGS_ALIASING]) if test "${OPT-unset}" = "unset" then case $GCC in yes) if test -n "${cc_is_clang}" then # bpo-30104: disable strict aliasing to compile correctly dtoa.c, # see Makefile.pre.in for more information CFLAGS_ALIASING="-fno-strict-aliasing" fi case $ac_cv_prog_cc_g in yes) if test "$Py_DEBUG" = 'true' ; then OPT="-g $PYDEBUG_CFLAGS -Wall" else OPT="-g -O3 -Wall" fi ;; *) OPT="-O3 -Wall" ;; esac case $ac_sys_system in SCO_SV*) OPT="$OPT -m486 -DSCO5" ;; esac ;; *) OPT="-O" ;; esac fi # WASM flags AS_CASE([$ac_sys_system], [Emscripten], [ dnl build with WASM debug info if either Py_DEBUG is set or the target is dnl node-debug or browser-debug. AS_VAR_IF([Py_DEBUG], [yes], [wasm_debug=yes], [wasm_debug=no]) dnl Start with 20 MB and allow to grow AS_VAR_APPEND([LDFLAGS_NODIST], [" -sALLOW_MEMORY_GROWTH -sTOTAL_MEMORY=20971520"]) dnl map int64_t and uint64_t to JS bigint AS_VAR_APPEND([LDFLAGS_NODIST], [" -sWASM_BIGINT"]) dnl Include file system support AS_VAR_APPEND([LDFLAGS_NODIST], [" -sFORCE_FILESYSTEM -lidbfs.js -lnodefs.js -lproxyfs.js -lworkerfs.js"]) AS_VAR_IF([enable_wasm_dynamic_linking], [yes], [ AS_VAR_APPEND([LINKFORSHARED], [" -sMAIN_MODULE"]) ]) AS_VAR_IF([enable_wasm_pthreads], [yes], [ AS_VAR_APPEND([CFLAGS_NODIST], [" -pthread"]) AS_VAR_APPEND([LDFLAGS_NODIST], [" -sUSE_PTHREADS"]) AS_VAR_APPEND([LINKFORSHARED], [" -sPROXY_TO_PTHREAD"]) ]) AS_CASE([$ac_sys_emscripten_target], [browser*], [ AS_VAR_IF([ac_sys_emscripten_target], [browser-debug], [wasm_debug=yes]) AS_VAR_APPEND([LINKFORSHARED], [" --preload-file=\$(WASM_ASSETS_DIR)"]) WASM_ASSETS_DIR=".\$(prefix)" WASM_STDLIB="\$(WASM_ASSETS_DIR)/local/lib/python\$(VERSION)/os.py" dnl separate-dwarf does not seem to work in Chrome DevTools Support. WASM_LINKFORSHARED_DEBUG="-gsource-map --emit-symbol-map" ], [node*], [ AS_VAR_IF([ac_sys_emscripten_target], [node-debug], [wasm_debug=yes]) AS_VAR_APPEND([LDFLAGS_NODIST], [" -sALLOW_MEMORY_GROWTH -sNODERAWFS"]) AS_VAR_APPEND([LINKFORSHARED], [" -sEXIT_RUNTIME"]) WASM_LINKFORSHARED_DEBUG="-gseparate-dwarf --emit-symbol-map" ] ) AS_VAR_IF([wasm_debug], [yes], [ AS_VAR_APPEND([LDFLAGS_NODIST], [" -sASSERTIONS"]) AS_VAR_APPEND([LINKFORSHARED], [" $WASM_LINKFORSHARED_DEBUG"]) ], [ AS_VAR_APPEND([LINKFORSHARED], [" -O2 -g0"]) ]) ], [WASI], [ AC_DEFINE([_WASI_EMULATED_SIGNAL], [1], [Define to 1 if you want to emulate signals on WASI]) AC_DEFINE([_WASI_EMULATED_GETPID], [1], [Define to 1 if you want to emulate getpid() on WASI]) AC_DEFINE([_WASI_EMULATED_PROCESS_CLOCKS], [1], [Define to 1 if you want to emulate process clocks on WASI]) LIBS="$LIBS -lwasi-emulated-signal -lwasi-emulated-getpid -lwasi-emulated-process-clocks" echo "#define _WASI_EMULATED_SIGNAL 1" >> confdefs.h AS_VAR_IF([enable_wasm_pthreads], [yes], [ # Note: update CFLAGS because ac_compile/ac_link needs this too. # without this, configure fails to find pthread_create, sem_init, # etc because they are only available in the sysroot for # wasm32-wasi-threads. # Note: wasi-threads requires --import-memory. # Note: wasi requires --export-memory. # Note: --export-memory is implicit unless --import-memory is given # Note: this requires LLVM >= 16. AS_VAR_APPEND([CFLAGS], [" -target wasm32-wasi-threads -pthread"]) AS_VAR_APPEND([CFLAGS_NODIST], [" -target wasm32-wasi-threads -pthread"]) AS_VAR_APPEND([LDFLAGS_NODIST], [" -target wasm32-wasi-threads -pthread"]) AS_VAR_APPEND([LDFLAGS_NODIST], [" -Wl,--import-memory"]) AS_VAR_APPEND([LDFLAGS_NODIST], [" -Wl,--export-memory"]) AS_VAR_APPEND([LDFLAGS_NODIST], [" -Wl,--max-memory=10485760"]) ]) dnl gh-117645: Set the memory size to 40 MiB, the stack size to 16 MiB, dnl and move the stack first. dnl https://github.com/WebAssembly/wasi-libc/issues/233 AS_VAR_APPEND([LDFLAGS_NODIST], [" -z stack-size=16777216 -Wl,--stack-first -Wl,--initial-memory=41943040"]) ] ) AS_CASE([$enable_wasm_dynamic_linking], [yes], [ac_cv_func_dlopen=yes], [no], [ac_cv_func_dlopen=no], [missing], [] ) AC_SUBST([BASECFLAGS]) AC_SUBST([CFLAGS_NODIST]) AC_SUBST([LDFLAGS_NODIST]) AC_SUBST([LDFLAGS_NOLTO]) AC_SUBST([WASM_ASSETS_DIR]) AC_SUBST([WASM_STDLIB]) # The -arch flags for universal builds on macOS UNIVERSAL_ARCH_FLAGS= AC_SUBST([UNIVERSAL_ARCH_FLAGS]) dnl PY_CHECK_CC_WARNING(ENABLE, WARNING, [MSG]) AC_DEFUN([PY_CHECK_CC_WARNING], [ AS_VAR_PUSHDEF([py_var], [ac_cv_$1_]m4_normalize($2)[_warning]) AC_CACHE_CHECK([m4_ifblank([$3], [if we can $1 $CC $2 warning], [$3])], [py_var], [ AS_VAR_COPY([py_cflags], [CFLAGS]) AS_VAR_APPEND([CFLAGS], [" -W$2 -Werror"]) AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])], [AS_VAR_SET([py_var], [yes])], [AS_VAR_SET([py_var], [no])]) AS_VAR_COPY([CFLAGS], [py_cflags]) ]) AS_VAR_POPDEF([py_var]) ]) # tweak BASECFLAGS based on compiler and platform AS_VAR_IF([with_strict_overflow], [yes], [BASECFLAGS="$BASECFLAGS $STRICT_OVERFLOW_CFLAGS"], [BASECFLAGS="$BASECFLAGS $NO_STRICT_OVERFLOW_CFLAGS"]) # Enable flags that warn and protect for potential security vulnerabilities. # These flags should be enabled by default for all builds. AC_MSG_CHECKING([for --enable-safety]) AC_ARG_ENABLE([safety], [AS_HELP_STRING([--enable-safety], [enable usage of the security compiler options with no performance overhead])], [AS_VAR_IF([disable_safety], [yes], [enable_safety=no], [enable_safety=yes])], [enable_safety=no]) AC_MSG_RESULT([$enable_safety]) if test "$enable_safety" = "yes" then AX_CHECK_COMPILE_FLAG([-fstack-protector-strong], [CFLAGS_NODIST="$CFLAGS_NODIST -fstack-protector-strong"], [AC_MSG_WARN([-fstack-protector-strong not supported])], [-Werror]) AX_CHECK_COMPILE_FLAG([-Wtrampolines], [CFLAGS_NODIST="$CFLAGS_NODIST -Wtrampolines"], [AC_MSG_WARN([-Wtrampolines not supported])], [-Werror]) AX_CHECK_COMPILE_FLAG([-Wimplicit-fallthrough], [CFLAGS_NODIST="$CFLAGS_NODIST -Wimplicit-fallthrough"], [AC_MSG_WARN([-Wimplicit-fallthrough not supported])], [-Werror]) AX_CHECK_COMPILE_FLAG([-Werror=format-security], [CFLAGS_NODIST="$CFLAGS_NODIST -Werror=format-security"], [AC_MSG_WARN([-Werror=format-security not supported])], [-Werror]) AX_CHECK_COMPILE_FLAG([-Wbidi-chars=any], [CFLAGS_NODIST="$CFLAGS_NODIST -Wbidi-chars=any"], [AC_MSG_WARN([-Wbidi-chars=any not supported])], [-Werror]) AX_CHECK_COMPILE_FLAG([-Wall], [CFLAGS_NODIST="$CFLAGS_NODIST -Wall"], [AC_MSG_WARN([-Wall not supported])], [-Werror]) fi AC_MSG_CHECKING([for --enable-slower-safety]) AC_ARG_ENABLE([slower-safety], [AS_HELP_STRING([--enable-slower-safety], [enable usage of the security compiler options with performance overhead])], [AS_VAR_IF([disable_slower_safety], [yes], [enable_slower_safety=no], [enable_slower_safety=yes])], [enable_slower_safety=no]) AC_MSG_RESULT([$enable_slower_safety]) if test "$enable_slower_safety" = "yes" then AX_CHECK_COMPILE_FLAG([-D_FORTIFY_SOURCE=3], [CFLAGS_NODIST="$CFLAGS_NODIST -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=3"], [AC_MSG_WARN([-D_FORTIFY_SOURCE=3 not supported])], [-Werror]) fi case $GCC in yes) CFLAGS_NODIST="$CFLAGS_NODIST -std=c11" PY_CHECK_CC_WARNING([enable], [extra], [if we can add -Wextra]) AS_VAR_IF([ac_cv_enable_extra_warning], [yes], [CFLAGS_NODIST="$CFLAGS_NODIST -Wextra"]) # Python doesn't violate C99 aliasing rules, but older versions of # GCC produce warnings for legal Python code. Enable # -fno-strict-aliasing on versions of GCC that support but produce # warnings. See Issue3326 ac_save_cc="$CC" CC="$CC -fno-strict-aliasing" save_CFLAGS="$CFLAGS" AC_CACHE_CHECK([whether $CC accepts and needs -fno-strict-aliasing], [ac_cv_no_strict_aliasing], AC_COMPILE_IFELSE( [ AC_LANG_PROGRAM([[]], [[]]) ],[ CC="$ac_save_cc -fstrict-aliasing" CFLAGS="$CFLAGS -Werror -Wstrict-aliasing" AC_COMPILE_IFELSE( [ AC_LANG_PROGRAM([[void f(int **x) {}]], [[double *x; f((int **) &x);]]) ],[ ac_cv_no_strict_aliasing=no ],[ ac_cv_no_strict_aliasing=yes ]) ],[ ac_cv_no_strict_aliasing=no ])) CFLAGS="$save_CFLAGS" CC="$ac_save_cc" AS_VAR_IF([ac_cv_no_strict_aliasing], [yes], [BASECFLAGS="$BASECFLAGS -fno-strict-aliasing"]) # ICC doesn't recognize the option, but only emits a warning ## XXX does it emit an unused result warning and can it be disabled? AS_CASE(["$CC_BASENAME"], [*icc*], [ac_cv_disable_unused_result_warning=no] [PY_CHECK_CC_WARNING([disable], [unused-result])]) AS_VAR_IF([ac_cv_disable_unused_result_warning], [yes], [BASECFLAGS="$BASECFLAGS -Wno-unused-result" CFLAGS_NODIST="$CFLAGS_NODIST -Wno-unused-result"]) PY_CHECK_CC_WARNING([disable], [unused-parameter]) AS_VAR_IF([ac_cv_disable_unused_parameter_warning], [yes], [CFLAGS_NODIST="$CFLAGS_NODIST -Wno-unused-parameter"]) PY_CHECK_CC_WARNING([disable], [int-conversion]) AS_VAR_IF([ac_cv_disable_int_conversion], [yes], [CFLAGS_NODIST="$CFLAGS_NODIST -Wno-int-conversion"]) PY_CHECK_CC_WARNING([disable], [missing-field-initializers]) AS_VAR_IF([ac_cv_disable_missing_field_initializers_warning], [yes], [CFLAGS_NODIST="$CFLAGS_NODIST -Wno-missing-field-initializers"]) PY_CHECK_CC_WARNING([enable], [sign-compare]) AS_VAR_IF([ac_cv_enable_sign_compare_warning], [yes], [BASECFLAGS="$BASECFLAGS -Wsign-compare"]) PY_CHECK_CC_WARNING([enable], [unreachable-code]) # Don't enable unreachable code warning in debug mode, since it usually # results in non-standard code paths. # Issue #24324: Unfortunately, the unreachable code warning does not work # correctly on gcc and has been silently removed from the compiler. # It is supported on clang but on OS X systems gcc may be an alias # for clang. Try to determine if the compiler is not really gcc and, # if so, only then enable the warning. if test $ac_cv_enable_unreachable_code_warning = yes && \ test "$Py_DEBUG" != "true" && \ test -z "`$CC --version 2>/dev/null | grep 'Free Software Foundation'`" then BASECFLAGS="$BASECFLAGS -Wunreachable-code" else ac_cv_enable_unreachable_code_warning=no fi PY_CHECK_CC_WARNING([enable], [strict-prototypes]) AS_VAR_IF([ac_cv_enable_strict_prototypes_warning], [yes], [CFLAGS_NODIST="$CFLAGS_NODIST -Wstrict-prototypes"]) ac_save_cc="$CC" CC="$CC -Werror=implicit-function-declaration" AC_CACHE_CHECK([if we can make implicit function declaration an error in $CC], [ac_cv_enable_implicit_function_declaration_error], AC_COMPILE_IFELSE( [ AC_LANG_PROGRAM([[]], [[]]) ],[ ac_cv_enable_implicit_function_declaration_error=yes ],[ ac_cv_enable_implicit_function_declaration_error=no ])) CC="$ac_save_cc" AS_VAR_IF([ac_cv_enable_implicit_function_declaration_error], [yes], [CFLAGS_NODIST="$CFLAGS_NODIST -Werror=implicit-function-declaration"]) ac_save_cc="$CC" CC="$CC -fvisibility=hidden" AC_CACHE_CHECK([if we can use visibility in $CC], [ac_cv_enable_visibility], AC_COMPILE_IFELSE( [ AC_LANG_PROGRAM([[]], [[]]) ],[ ac_cv_enable_visibility=yes ],[ ac_cv_enable_visibility=no ])) CC="$ac_save_cc" AS_VAR_IF([ac_cv_enable_visibility], [yes], [CFLAGS_NODIST="$CFLAGS_NODIST -fvisibility=hidden"]) # if using gcc on alpha, use -mieee to get (near) full IEEE 754 # support. Without this, treatment of subnormals doesn't follow # the standard. case $host in alpha*) BASECFLAGS="$BASECFLAGS -mieee" ;; esac case $ac_sys_system in SCO_SV*) BASECFLAGS="$BASECFLAGS -m486 -DSCO5" ;; Darwin*) # -Wno-long-double, -no-cpp-precomp, and -mno-fused-madd # used to be here, but non-Apple gcc doesn't accept them. if test "${CC}" = gcc then AC_MSG_CHECKING([which compiler should be used]) case "${UNIVERSALSDK}" in */MacOSX10.4u.sdk) # Build using 10.4 SDK, force usage of gcc when the # compiler is gcc, otherwise the user will get very # confusing error messages when building on OSX 10.6 CC=gcc-4.0 CPP=cpp-4.0 ;; esac AC_MSG_RESULT([$CC]) fi LIPO_INTEL64_FLAGS="" if test "${enable_universalsdk}" then case "$UNIVERSAL_ARCHS" in 32-bit) UNIVERSAL_ARCH_FLAGS="-arch ppc -arch i386" LIPO_32BIT_FLAGS="" ARCH_RUN_32BIT="" ;; 64-bit) UNIVERSAL_ARCH_FLAGS="-arch ppc64 -arch x86_64" LIPO_32BIT_FLAGS="" ARCH_RUN_32BIT="true" ;; all) UNIVERSAL_ARCH_FLAGS="-arch i386 -arch ppc -arch ppc64 -arch x86_64" LIPO_32BIT_FLAGS="-extract ppc7400 -extract i386" ARCH_RUN_32BIT="/usr/bin/arch -i386 -ppc" ;; universal2) UNIVERSAL_ARCH_FLAGS="-arch arm64 -arch x86_64" LIPO_32BIT_FLAGS="" LIPO_INTEL64_FLAGS="-extract x86_64" ARCH_RUN_32BIT="true" ;; intel) UNIVERSAL_ARCH_FLAGS="-arch i386 -arch x86_64" LIPO_32BIT_FLAGS="-extract i386" ARCH_RUN_32BIT="/usr/bin/arch -i386" ;; intel-32) UNIVERSAL_ARCH_FLAGS="-arch i386" LIPO_32BIT_FLAGS="" ARCH_RUN_32BIT="" ;; intel-64) UNIVERSAL_ARCH_FLAGS="-arch x86_64" LIPO_32BIT_FLAGS="" ARCH_RUN_32BIT="true" ;; 3-way) UNIVERSAL_ARCH_FLAGS="-arch i386 -arch ppc -arch x86_64" LIPO_32BIT_FLAGS="-extract ppc7400 -extract i386" ARCH_RUN_32BIT="/usr/bin/arch -i386 -ppc" ;; *) AC_MSG_ERROR([proper usage is --with-universal-arch=universal2|32-bit|64-bit|all|intel|3-way]) ;; esac if test "${UNIVERSALSDK}" != "/" then CFLAGS="${UNIVERSAL_ARCH_FLAGS} -isysroot ${UNIVERSALSDK} ${CFLAGS}" LDFLAGS="${UNIVERSAL_ARCH_FLAGS} -isysroot ${UNIVERSALSDK} ${LDFLAGS}" CPPFLAGS="-isysroot ${UNIVERSALSDK} ${CPPFLAGS}" else CFLAGS="${UNIVERSAL_ARCH_FLAGS} ${CFLAGS}" LDFLAGS="${UNIVERSAL_ARCH_FLAGS} ${LDFLAGS}" fi fi # Calculate an appropriate deployment target for this build: # The deployment target value is used explicitly to enable certain # features are enabled (such as builtin libedit support for readline) # through the use of Apple's Availability Macros and is used as a # component of the string returned by distutils.get_platform(). # # Use the value from: # 1. the MACOSX_DEPLOYMENT_TARGET environment variable if specified # 2. the operating system version of the build machine if >= 10.6 # 3. If running on OS X 10.3 through 10.5, use the legacy tests # below to pick either 10.3, 10.4, or 10.5 as the target. # 4. If we are running on OS X 10.2 or earlier, good luck! AC_MSG_CHECKING([which MACOSX_DEPLOYMENT_TARGET to use]) cur_target_major=`sw_vers -productVersion | \ sed 's/\([[0-9]]*\)\.\([[0-9]]*\).*/\1/'` cur_target_minor=`sw_vers -productVersion | \ sed 's/\([[0-9]]*\)\.\([[0-9]]*\).*/\2/'` cur_target="${cur_target_major}.${cur_target_minor}" if test ${cur_target_major} -eq 10 && \ test ${cur_target_minor} -ge 3 && \ test ${cur_target_minor} -le 5 then # OS X 10.3 through 10.5 cur_target=10.3 if test ${enable_universalsdk} then case "$UNIVERSAL_ARCHS" in all|3-way|intel|64-bit) # These configurations were first supported in 10.5 cur_target='10.5' ;; esac else if test `/usr/bin/arch` = "i386" then # 10.4 was the first release to support Intel archs cur_target="10.4" fi fi fi CONFIGURE_MACOSX_DEPLOYMENT_TARGET=${MACOSX_DEPLOYMENT_TARGET-${cur_target}} # Make sure that MACOSX_DEPLOYMENT_TARGET is set in the # environment with a value that is the same as what we'll use # in the Makefile to ensure that we'll get the same compiler # environment during configure and build time. MACOSX_DEPLOYMENT_TARGET="$CONFIGURE_MACOSX_DEPLOYMENT_TARGET" export MACOSX_DEPLOYMENT_TARGET EXPORT_MACOSX_DEPLOYMENT_TARGET='' AC_MSG_RESULT([$MACOSX_DEPLOYMENT_TARGET]) AC_MSG_CHECKING([if specified universal architectures work]) AC_LINK_IFELSE([AC_LANG_PROGRAM([[@%:@include ]], [[printf("%d", 42);]])], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no]) AC_MSG_ERROR([check config.log and use the '--with-universal-archs' option]) ]) # end of Darwin* tests ;; esac ;; *) case $ac_sys_system in OpenUNIX*|UnixWare*) BASECFLAGS="$BASECFLAGS -K pentium,host,inline,loop_unroll,alloca " ;; SCO_SV*) BASECFLAGS="$BASECFLAGS -belf -Ki486 -DSCO5" ;; esac ;; esac case "$CC_BASENAME" in *mpicc*) CFLAGS_NODIST="$CFLAGS_NODIST" ;; *icc*) # ICC needs -fp-model strict or floats behave badly CFLAGS_NODIST="$CFLAGS_NODIST -fp-model strict" ;; *xlc*) CFLAGS_NODIST="$CFLAGS_NODIST -qalias=noansi -qmaxmem=-1" ;; esac if test "$assertions" = 'true'; then : else OPT="-DNDEBUG $OPT" fi if test "$ac_arch_flags" then BASECFLAGS="$BASECFLAGS $ac_arch_flags" fi # On some compilers, pthreads are available without further options # (e.g. MacOS X). On some of these systems, the compiler will not # complain if unaccepted options are passed (e.g. gcc on Mac OS X). # So we have to see first whether pthreads are available without # options before we can check whether -Kpthread improves anything. AC_CACHE_CHECK([whether pthreads are available without options], [ac_cv_pthread_is_default], [AC_RUN_IFELSE([AC_LANG_SOURCE([[ #include #include void* routine(void* p){return NULL;} int main(void){ pthread_t p; if(pthread_create(&p,NULL,routine,NULL)!=0) return 1; (void)pthread_detach(p); return 0; } ]])],[ ac_cv_pthread_is_default=yes ac_cv_kthread=no ac_cv_pthread=no ],[ac_cv_pthread_is_default=no],[ac_cv_pthread_is_default=no]) ]) if test $ac_cv_pthread_is_default = yes then ac_cv_kpthread=no else # -Kpthread, if available, provides the right #defines # and linker options to make pthread_create available # Some compilers won't report that they do not support -Kpthread, # so we need to run a program to see whether it really made the # function available. 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AC_CHECK_HEADERS([net/if.h], [], [], [#include #include #include #ifdef HAVE_SYS_SOCKET_H # include #endif ]) # On Linux, netlink.h requires asm/types.h # On FreeBSD, netlink.h is located in netlink/netlink.h AC_CHECK_HEADERS([linux/netlink.h netlink/netlink.h], [], [], [ #ifdef HAVE_ASM_TYPES_H #include #endif #ifdef HAVE_SYS_SOCKET_H #include #endif ]) # On Linux, qrtr.h requires asm/types.h AC_CHECK_HEADERS([linux/qrtr.h], [], [], [ #ifdef HAVE_ASM_TYPES_H #include #endif #ifdef HAVE_SYS_SOCKET_H #include #endif ]) AC_CHECK_HEADERS([linux/vm_sockets.h], [], [], [ #ifdef HAVE_SYS_SOCKET_H #include #endif ]) # On Linux, can.h, can/bcm.h, can/j1939.h, can/raw.h require sys/socket.h # On NetBSD, netcan/can.h requires sys/socket.h AC_CHECK_HEADERS( [linux/can.h linux/can/bcm.h linux/can/j1939.h linux/can/raw.h netcan/can.h], [], [], [ #ifdef HAVE_SYS_SOCKET_H #include #endif ]) # Check for clock_t in time.h. AC_CHECK_TYPES([clock_t], [], [AC_DEFINE([clock_t], [long], [Define to 'long' if does not define clock_t.])], [@%:@include ]) AC_CACHE_CHECK([for makedev], [ac_cv_func_makedev], [ AC_LINK_IFELSE([AC_LANG_PROGRAM([[ #if defined(MAJOR_IN_MKDEV) #include #elif defined(MAJOR_IN_SYSMACROS) #include #else #include #endif ]], [[ makedev(0, 0) ]]) ],[ac_cv_func_makedev=yes],[ac_cv_func_makedev=no]) ]) AS_VAR_IF([ac_cv_func_makedev], [yes], [ AC_DEFINE([HAVE_MAKEDEV], [1], [Define this if you have the makedev macro.]) ]) # byte swapping AC_CACHE_CHECK([for le64toh], [ac_cv_func_le64toh], [ AC_LINK_IFELSE([AC_LANG_PROGRAM([[ #ifdef HAVE_ENDIAN_H #include #elif defined(HAVE_SYS_ENDIAN_H) #include #endif ]], [[ le64toh(1) ]]) ],[ac_cv_func_le64toh=yes],[ac_cv_func_le64toh=no]) ]) AS_VAR_IF([ac_cv_func_le64toh], [yes], [ AC_DEFINE([HAVE_HTOLE64], [1], [Define this if you have le64toh()]) ]) use_lfs=yes # Don't use largefile support for GNU/Hurd case $ac_sys_system in GNU*) use_lfs=no esac if test "$use_lfs" = "yes"; then # Two defines needed to enable largefile support on various platforms # These may affect some typedefs case $ac_sys_system/$ac_sys_release in AIX*) AC_DEFINE([_LARGE_FILES], [1], [This must be defined on AIX systems to enable large file support.]) ;; esac AC_DEFINE([_LARGEFILE_SOURCE], [1], [This must be defined on some systems to enable large file support.]) AC_DEFINE([_FILE_OFFSET_BITS], [64], [This must be set to 64 on some systems to enable large file support.]) fi # Add some code to confdefs.h so that the test for off_t works on SCO cat >> confdefs.h <<\EOF #if defined(SCO_DS) #undef _OFF_T #endif EOF # Type availability checks AC_TYPE_MODE_T AC_TYPE_OFF_T AC_TYPE_PID_T AC_DEFINE_UNQUOTED([RETSIGTYPE],[void],[assume C89 semantics that RETSIGTYPE is always void]) AC_TYPE_SIZE_T AC_TYPE_UID_T AC_CHECK_TYPES([ssize_t]) AC_CHECK_TYPES([__uint128_t], [AC_DEFINE([HAVE_GCC_UINT128_T], [1], [Define if your compiler provides __uint128_t])]) # Sizes and alignments of various common basic types # ANSI C requires sizeof(char) == 1, so no need to check it AC_CHECK_SIZEOF([int], [4]) AC_CHECK_SIZEOF([long], [4]) AC_CHECK_ALIGNOF([long]) AC_CHECK_SIZEOF([long long], [8]) AC_CHECK_SIZEOF([void *], [4]) AC_CHECK_SIZEOF([short], [2]) AC_CHECK_SIZEOF([float], [4]) AC_CHECK_SIZEOF([double], [8]) AC_CHECK_SIZEOF([fpos_t], [4]) AC_CHECK_SIZEOF([size_t], [4]) AC_CHECK_ALIGNOF([size_t]) AC_CHECK_SIZEOF([pid_t], [4]) AC_CHECK_SIZEOF([uintptr_t]) AC_CHECK_ALIGNOF([max_align_t]) AC_TYPE_LONG_DOUBLE AC_CHECK_SIZEOF([long double], [16]) AC_CHECK_SIZEOF([_Bool], [1]) AC_CHECK_SIZEOF([off_t], [], [ #ifdef HAVE_SYS_TYPES_H #include #endif ]) AC_MSG_CHECKING([whether to enable large file support]) if test "$ac_cv_sizeof_off_t" -gt "$ac_cv_sizeof_long" -a \ "$ac_cv_sizeof_long_long" -ge "$ac_cv_sizeof_off_t"; then have_largefile_support="yes" else have_largefile_support="no" fi dnl LFS does not work with Emscripten 3.1 AS_CASE([$ac_sys_system], [Emscripten], [have_largefile_support="no"] ) AS_VAR_IF([have_largefile_support], [yes], [ AC_DEFINE([HAVE_LARGEFILE_SUPPORT], [1], [Defined to enable large file support when an off_t is bigger than a long and long long is at least as big as an off_t. 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This, in turn, means that applications linking the shared libpython # don't need to link LIBS explicitly. The default should be only changed # on systems where this approach causes problems. AC_SUBST([SHLIBS]) AC_MSG_CHECKING([SHLIBS]) case "$ac_sys_system" in *) SHLIBS='$(LIBS)';; esac AC_MSG_RESULT([$SHLIBS]) dnl perf trampoline is Linux specific and requires an arch-specific dnl trampoline in assembly. AC_MSG_CHECKING([perf trampoline]) AS_CASE([$PLATFORM_TRIPLET], [x86_64-linux-gnu], [perf_trampoline=yes], [aarch64-linux-gnu], [perf_trampoline=yes], [perf_trampoline=no] ) AC_MSG_RESULT([$perf_trampoline]) AS_VAR_IF([perf_trampoline], [yes], [ AC_DEFINE([PY_HAVE_PERF_TRAMPOLINE], [1], [Define to 1 if you have the perf trampoline.]) PERF_TRAMPOLINE_OBJ=Python/asm_trampoline.o dnl perf needs frame pointers for unwinding, include compiler option in debug builds AS_VAR_IF([Py_DEBUG], [true], [ AS_VAR_APPEND([BASECFLAGS], [" -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer"]) ]) ]) AC_SUBST([PERF_TRAMPOLINE_OBJ]) # checks for libraries AC_CHECK_LIB([sendfile], [sendfile]) AC_CHECK_LIB([dl], [dlopen]) # Dynamic linking for SunOS/Solaris and SYSV AC_CHECK_LIB([dld], [shl_load]) # Dynamic linking for HP-UX dnl check for uuid dependencies AH_TEMPLATE([HAVE_UUID_H], [Define to 1 if you have the header file.]) AH_TEMPLATE([HAVE_UUID_UUID_H], [Define to 1 if you have the header file.]) AH_TEMPLATE([HAVE_UUID_GENERATE_TIME_SAFE], [Define if uuid_generate_time_safe() exists.]) have_uuid=missing dnl AIX provides support for RFC4122 (uuid) in libc.a starting with AIX 6.1 dnl (anno 2007). FreeBSD and OpenBSD provides support in libc as well. dnl Little-endian FreeBSD, OpenBSD and NetBSD needs encoding into an octet dnl stream in big-endian byte-order AC_CHECK_HEADERS([uuid.h], [AC_CHECK_FUNCS([uuid_create uuid_enc_be], [have_uuid=yes LIBUUID_CFLAGS=${LIBUUID_CFLAGS-""} LIBUUID_LIBS=${LIBUUID_LIBS-""} ]) ]) AS_VAR_IF([have_uuid], [missing], [ PKG_CHECK_MODULES( [LIBUUID], [uuid >= 2.20], [dnl linux-util's libuuid has uuid_generate_time_safe() since v2.20 (2011) dnl and provides . have_uuid=yes AC_DEFINE([HAVE_UUID_H], [1]) AC_DEFINE([HAVE_UUID_GENERATE_TIME_SAFE], [1]) ], [ WITH_SAVE_ENV([ CPPFLAGS="$CPPFLAGS $LIBUUID_CFLAGS" LDFLAGS="$LDFLAGS $LIBUUID_LIBS" AC_CHECK_HEADERS([uuid/uuid.h], [ PY_CHECK_LIB([uuid], [uuid_generate_time], [have_uuid=yes]) PY_CHECK_LIB([uuid], [uuid_generate_time_safe], [have_uuid=yes AC_DEFINE([HAVE_UUID_GENERATE_TIME_SAFE], [1]) ]) ]) AS_VAR_IF([have_uuid], [yes], [ LIBUUID_CFLAGS=${LIBUUID_CFLAGS-""} LIBUUID_LIBS=${LIBUUID_LIBS-"-luuid"} ]) ]) ] ) ]) dnl macOS has uuid/uuid.h but uuid_generate_time is in libc AS_VAR_IF([have_uuid], [missing], [ AC_CHECK_HEADERS([uuid/uuid.h], [ AC_CHECK_FUNC([uuid_generate_time], [ have_uuid=yes LIBUUID_CFLAGS=${LIBUUID_CFLAGS-""} LIBUUID_LIBS=${LIBUUID_LIBS-""} ]) ]) ]) # gh-124228: While the libuuid library is available on NetBSD, it supports only UUID version 4. # This restriction inhibits the proper generation of time-based UUIDs. if test "$ac_sys_system" = "NetBSD"; then have_uuid=missing AC_DEFINE([HAVE_UUID_H], [0]) fi AS_VAR_IF([have_uuid], [missing], [have_uuid=no]) # 'Real Time' functions on Solaris # posix4 on Solaris 2.6 # pthread (first!) on Linux AC_SEARCH_LIBS([sem_init], [pthread rt posix4]) # check if we need libintl for locale functions AC_CHECK_LIB([intl], [textdomain], [AC_DEFINE([WITH_LIBINTL], [1], [Define to 1 if libintl is needed for locale functions.]) LIBS="-lintl $LIBS"]) # checks for system dependent C++ extensions support case "$ac_sys_system" in AIX*) AC_MSG_CHECKING([for genuine AIX C++ extensions support]) AC_LINK_IFELSE([ AC_LANG_PROGRAM([[@%:@include ]], [[loadAndInit("", 0, "")]]) ],[ AC_DEFINE([AIX_GENUINE_CPLUSPLUS], [1], [Define for AIX if your compiler is a genuine IBM xlC/xlC_r and you want support for AIX C++ shared extension modules.]) AC_MSG_RESULT([yes]) ],[ AC_MSG_RESULT([no]) ]) dnl The AIX_BUILDDATE is obtained from the kernel fileset - bos.mp64 # BUILD_GNU_TYPE + AIX_BUILDDATE are used to construct the platform_tag # of the AIX system used to build/package Python executable. This tag serves # as a baseline for bdist module packages AC_MSG_CHECKING([for the system builddate]) AIX_BUILDDATE=$(lslpp -Lcq bos.mp64 | awk -F: '{ print $NF }') AC_DEFINE_UNQUOTED([AIX_BUILDDATE], [$AIX_BUILDDATE], [BUILD_GNU_TYPE + AIX_BUILDDATE are used to construct the PEP425 tag of the build system.]) AC_MSG_RESULT([$AIX_BUILDDATE]) ;; *) ;; esac # check for _Complex C type # # Note that despite most compilers define __STDC_IEC_559_COMPLEX__ - almost # none properly support C11+ Annex G (where pure imaginary types # represented by _Imaginary are mandatory). This is a bug (see e.g. # llvm/llvm-project#60269), so we don't rely on presence # of __STDC_IEC_559_COMPLEX__. AC_RUN_IFELSE([AC_LANG_SOURCE([[ #include #define test(type, out) \ { \ type complex z = 1 + 2*I; z = z*z; \ (out) = (out) || creal(z) != -3 || cimag(z) != 4; \ } int main(void) { int res = 0; test(float, res); test(double, res); test(long double, res); return res; }]])], [ac_cv_c_complex_supported=yes], [ac_cv_c_complex_supported=no], [ac_cv_c_complex_supported=no]) if test "$ac_cv_c_complex_supported" = "yes"; then AC_DEFINE([Py_HAVE_C_COMPLEX], [1], [Defined if _Complex C type is available.]) fi # check for systems that require aligned memory access AC_CACHE_CHECK([aligned memory access is required], [ac_cv_aligned_required], [AC_RUN_IFELSE([AC_LANG_SOURCE([[ int main(void) { char s[16]; int i, *p1, *p2; for (i=0; i < 16; i++) s[i] = i; p1 = (int*)(s+1); p2 = (int*)(s+2); if (*p1 == *p2) return 1; return 0; }]])], [ac_cv_aligned_required=no], [ac_cv_aligned_required=yes], [ # "yes" changes the hash function to FNV, which causes problems with Numba # (https://github.com/numba/numba/blob/0.59.0/numba/cpython/hashing.py#L470). if test "$ac_sys_system" = "Linux-android"; then ac_cv_aligned_required=no else ac_cv_aligned_required=yes fi]) ]) if test "$ac_cv_aligned_required" = yes ; then AC_DEFINE([HAVE_ALIGNED_REQUIRED], [1], [Define if aligned memory access is required]) fi # str, bytes and memoryview hash algorithm AH_TEMPLATE([Py_HASH_ALGORITHM], [Define hash algorithm for str, bytes and memoryview. SipHash24: 1, FNV: 2, SipHash13: 3, externally defined: 0]) AC_MSG_CHECKING([for --with-hash-algorithm]) dnl quadrigraphs "@<:@" and "@:>@" produce "[" and "]" in the output AC_ARG_WITH( [hash_algorithm], [AS_HELP_STRING( [--with-hash-algorithm=@<:@fnv|siphash13|siphash24@:>@], [select hash algorithm for use in Python/pyhash.c (default is SipHash13)] )], [ AC_MSG_RESULT([$withval]) case "$withval" in siphash13) AC_DEFINE([Py_HASH_ALGORITHM], [3]) ;; siphash24) AC_DEFINE([Py_HASH_ALGORITHM], [1]) ;; fnv) AC_DEFINE([Py_HASH_ALGORITHM], [2]) ;; *) AC_MSG_ERROR([unknown hash algorithm '$withval']) ;; esac ], [AC_MSG_RESULT([default])]) validate_tzpath() { # Checks that each element of the path is an absolute path if test -z "$1"; then # Empty string is allowed: it indicates no system TZPATH return 0 fi # Bad paths are those that don't start with / dnl quadrigraphs "@<:@" and "@:>@" produce "[" and "]" in the output if ( echo $1 | grep '\(^\|:\)\(@<:@^/@:>@\|$\)' > /dev/null); then AC_MSG_ERROR([--with-tzpath must contain only absolute paths, not $1]) return 1; fi } TZPATH="/usr/share/zoneinfo:/usr/lib/zoneinfo:/usr/share/lib/zoneinfo:/etc/zoneinfo" AC_MSG_CHECKING([for --with-tzpath]) AC_ARG_WITH( [tzpath], [AS_HELP_STRING( [--with-tzpath=], [Select the default time zone search path for zoneinfo.TZPATH] )], [ case "$withval" in yes) AC_MSG_ERROR([--with-tzpath requires a value]) ;; *) validate_tzpath "$withval" TZPATH="$withval" AC_MSG_RESULT(["$withval"]) ;; esac ], [validate_tzpath "$TZPATH" AC_MSG_RESULT(["$TZPATH"])]) AC_SUBST([TZPATH]) # Most SVR4 platforms (e.g. Solaris) need -lsocket and -lnsl. AC_CHECK_LIB([nsl], [t_open], [LIBS="-lnsl $LIBS"]) # SVR4 AC_CHECK_LIB([socket], [socket], [LIBS="-lsocket $LIBS"], [], $LIBS) # SVR4 sockets case $ac_sys_system/$ac_sys_release in Haiku*) AC_CHECK_LIB([network], [socket], [LIBS="-lnetwork $LIBS"], [], [$LIBS]) ;; esac AC_MSG_CHECKING([for --with-libs]) AC_ARG_WITH( [libs], [AS_HELP_STRING( [--with-libs='lib1 ...'], [link against additional libs (default is no)] )], [ AC_MSG_RESULT([$withval]) LIBS="$withval $LIBS" ], [AC_MSG_RESULT([no])]) # Check for use of the system expat library AC_MSG_CHECKING([for --with-system-expat]) AC_ARG_WITH( [system_expat], [AS_HELP_STRING( [--with-system-expat], [build pyexpat module using an installed expat library, see Doc/library/pyexpat.rst (default is no)] )], [], [with_system_expat="no"]) AC_MSG_RESULT([$with_system_expat]) AS_VAR_IF([with_system_expat], [yes], [ LIBEXPAT_CFLAGS=${LIBEXPAT_CFLAGS-""} LIBEXPAT_LDFLAGS=${LIBEXPAT_LDFLAGS-"-lexpat"} LIBEXPAT_INTERNAL= ], [ LIBEXPAT_CFLAGS="-I\$(srcdir)/Modules/expat" LIBEXPAT_LDFLAGS="-lm \$(LIBEXPAT_A)" LIBEXPAT_INTERNAL="\$(LIBEXPAT_HEADERS) \$(LIBEXPAT_A)" ]) AC_SUBST([LIBEXPAT_CFLAGS]) AC_SUBST([LIBEXPAT_INTERNAL]) dnl detect libffi have_libffi=missing AS_VAR_IF([ac_sys_system], [Darwin], [ WITH_SAVE_ENV([ CFLAGS="-I${SDKROOT}/usr/include/ffi $CFLAGS" AC_CHECK_HEADER([ffi.h], [ AC_CHECK_LIB([ffi], [ffi_call], [ dnl use ffi from SDK root have_libffi=yes LIBFFI_CFLAGS="-I${SDKROOT}/usr/include/ffi -DUSING_APPLE_OS_LIBFFI=1" LIBFFI_LIBS="-lffi" ]) ]) ]) ]) AS_VAR_IF([have_libffi], [missing], [ PKG_CHECK_MODULES([LIBFFI], [libffi], [have_libffi=yes], [ WITH_SAVE_ENV([ CPPFLAGS="$CPPFLAGS $LIBFFI_CFLAGS" LDFLAGS="$LDFLAGS $LIBFFI_LIBS" AC_CHECK_HEADER([ffi.h], [ AC_CHECK_LIB([ffi], [ffi_call], [ have_libffi=yes LIBFFI_CFLAGS=${LIBFFI_CFLAGS-""} LIBFFI_LIBS=${LIBFFI_LIBS-"-lffi"} ], [have_libffi=no]) ]) ]) ]) ]) AS_VAR_IF([have_libffi], [yes], [ ctypes_malloc_closure=no AS_CASE([$ac_sys_system], [Darwin], [ dnl when do we need USING_APPLE_OS_LIBFFI? ctypes_malloc_closure=yes ], [iOS], [ ctypes_malloc_closure=yes ], [sunos5], [AS_VAR_APPEND([LIBFFI_LIBS], [" -mimpure-text"])] ) AS_VAR_IF([ctypes_malloc_closure], [yes], [ MODULE__CTYPES_MALLOC_CLOSURE=_ctypes/malloc_closure.c AS_VAR_APPEND([LIBFFI_CFLAGS], [" -DUSING_MALLOC_CLOSURE_DOT_C=1"]) ]) AC_SUBST([MODULE__CTYPES_MALLOC_CLOSURE]) dnl HAVE_LIBDL: for dlopen, see gh-76828 AS_VAR_IF([ac_cv_lib_dl_dlopen], [yes], [AS_VAR_APPEND([LIBFFI_LIBS], [" -ldl"])]) WITH_SAVE_ENV([ CFLAGS="$LIBFFI_CFLAGS $CFLAGS" LDFLAGS="$LIBFFI_LIBS $LDFLAGS" PY_CHECK_FUNC([ffi_prep_cif_var], [@%:@include ]) PY_CHECK_FUNC([ffi_prep_closure_loc], [@%:@include ]) PY_CHECK_FUNC([ffi_closure_alloc], [@%:@include ]) ]) ]) # Check for use of the system libmpdec library AC_MSG_CHECKING([for --with-system-libmpdec]) AC_ARG_WITH( [system_libmpdec], [AS_HELP_STRING( [--with-system-libmpdec], [build _decimal module using an installed mpdecimal library, see Doc/library/decimal.rst (default is yes)] )], [], [with_system_libmpdec="yes"]) AC_MSG_RESULT([$with_system_libmpdec]) AC_DEFUN([USE_BUNDLED_LIBMPDEC], [LIBMPDEC_CFLAGS="-I\$(srcdir)/Modules/_decimal/libmpdec" LIBMPDEC_LIBS="-lm \$(LIBMPDEC_A)" LIBMPDEC_INTERNAL="\$(LIBMPDEC_HEADERS) \$(LIBMPDEC_A)" have_mpdec=yes with_system_libmpdec=no]) AS_VAR_IF( [with_system_libmpdec], [yes], [PKG_CHECK_MODULES( [LIBMPDEC], [libmpdec >= 2.5.0], [], [LIBMPDEC_CFLAGS=${LIBMPDEC_CFLAGS-""} LIBMPDEC_LIBS=${LIBMPDEC_LIBS-"-lmpdec -lm"} LIBMPDEC_INTERNAL=])], [USE_BUNDLED_LIBMPDEC()]) AS_VAR_IF([with_system_libmpdec], [yes], [WITH_SAVE_ENV([ CPPFLAGS="$LIBMPDEC_CFLAGS $CPPFLAGS" LIBS="$LIBMPDEC_LIBS $LIBS" AC_LINK_IFELSE([ AC_LANG_PROGRAM([ #include #if MPD_VERSION_HEX < 0x02050000 # error "mpdecimal 2.5.0 or higher required" #endif ], [const char *x = mpd_version();])], [have_mpdec=yes], [have_mpdec=no]) ])], [AC_MSG_WARN([m4_normalize([ the bundled copy of libmpdecimal is scheduled for removal in Python 3.15; consider using a system installed mpdecimal library.])])]) AS_IF([test "$with_system_libmpdec" = "yes" && test "$have_mpdec" = "no"], [AC_MSG_WARN([m4_normalize([ no system libmpdecimal found; falling back to bundled libmpdecimal (deprecated and scheduled for removal in Python 3.15)])]) USE_BUNDLED_LIBMPDEC()]) # Disable forced inlining in debug builds, see GH-94847 AS_VAR_IF( [with_pydebug], [yes], [AS_VAR_APPEND([LIBMPDEC_CFLAGS], [" -DTEST_COVERAGE"])]) # Check whether _decimal should use a coroutine-local or thread-local context AC_MSG_CHECKING([for --with-decimal-contextvar]) AC_ARG_WITH( [decimal_contextvar], [AS_HELP_STRING( [--with-decimal-contextvar], [build _decimal module using a coroutine-local rather than a thread-local context (default is yes)] )], [], [with_decimal_contextvar="yes"]) if test "$with_decimal_contextvar" != "no" then AC_DEFINE([WITH_DECIMAL_CONTEXTVAR], [1], [Define if you want build the _decimal module using a coroutine-local rather than a thread-local context]) fi AC_MSG_RESULT([$with_decimal_contextvar]) AS_VAR_IF( [with_system_libmpdec], [no], [# Check for libmpdec machine flavor AC_MSG_CHECKING([for decimal libmpdec machine]) AS_CASE([$ac_sys_system], [Darwin*], [libmpdec_system=Darwin], [SunOS*], [libmpdec_system=sunos], [libmpdec_system=other] ) libmpdec_machine=unknown if test "$libmpdec_system" = Darwin; then # universal here means: build libmpdec with the same arch options # the python interpreter was built with libmpdec_machine=universal elif test $ac_cv_sizeof_size_t -eq 8; then if test "$ac_cv_gcc_asm_for_x64" = yes; then libmpdec_machine=x64 elif test "$ac_cv_type___uint128_t" = yes; then libmpdec_machine=uint128 else libmpdec_machine=ansi64 fi elif test $ac_cv_sizeof_size_t -eq 4; then if test "$ac_cv_gcc_asm_for_x87" = yes -a "$libmpdec_system" != sunos; then AS_CASE([$CC], [*gcc*], [libmpdec_machine=ppro], [*clang*], [libmpdec_machine=ppro], [libmpdec_machine=ansi32] ) else libmpdec_machine=ansi32 fi fi AC_MSG_RESULT([$libmpdec_machine]) AS_CASE([$libmpdec_machine], [x64], [AS_VAR_APPEND([LIBMPDEC_CFLAGS], [" -DCONFIG_64=1 -DASM=1"])], [uint128], [AS_VAR_APPEND([LIBMPDEC_CFLAGS], [" -DCONFIG_64=1 -DANSI=1 -DHAVE_UINT128_T=1"])], [ansi64], [AS_VAR_APPEND([LIBMPDEC_CFLAGS], [" -DCONFIG_64=1 -DANSI=1"])], [ppro], [AS_VAR_APPEND([LIBMPDEC_CFLAGS], [" -DCONFIG_32=1 -DANSI=1 -DASM=1 -Wno-unknown-pragmas"])], [ansi32], [AS_VAR_APPEND([LIBMPDEC_CFLAGS], [" -DCONFIG_32=1 -DANSI=1"])], [ansi-legacy], [AS_VAR_APPEND([LIBMPDEC_CFLAGS], [" -DCONFIG_32=1 -DANSI=1 -DLEGACY_COMPILER=1"])], [universal], [AS_VAR_APPEND([LIBMPDEC_CFLAGS], [" -DUNIVERSAL=1"])], [AC_MSG_ERROR([_decimal: unsupported architecture])] )]) if test "$have_ipa_pure_const_bug" = yes; then # Some versions of gcc miscompile inline asm: # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=46491 # https://gcc.gnu.org/ml/gcc/2010-11/msg00366.html AS_VAR_APPEND([LIBMPDEC_CFLAGS], [" -fno-ipa-pure-const"]) fi if test "$have_glibc_memmove_bug" = yes; then # _FORTIFY_SOURCE wrappers for memmove and bcopy are incorrect: # https://sourceware.org/ml/libc-alpha/2010-12/msg00009.html AS_VAR_APPEND([LIBMPDEC_CFLAGS], [" -U_FORTIFY_SOURCE"]) fi AC_SUBST([LIBMPDEC_CFLAGS]) AC_SUBST([LIBMPDEC_INTERNAL]) dnl detect sqlite3 from Emscripten emport PY_CHECK_EMSCRIPTEN_PORT([LIBSQLITE3], [-sUSE_SQLITE3]) dnl Check for SQLite library. Use pkg-config if available. PKG_CHECK_MODULES( [LIBSQLITE3], [sqlite3 >= 3.15.2], [], [ LIBSQLITE3_CFLAGS=${LIBSQLITE3_CFLAGS-""} LIBSQLITE3_LIBS=${LIBSQLITE3_LIBS-"-lsqlite3"} ] ) AS_VAR_APPEND([LIBSQLITE3_CFLAGS], [' -I$(srcdir)/Modules/_sqlite']) dnl PY_CHECK_SQLITE_FUNC(FUNCTION, IF-FOUND, IF-NOT-FOUND) AC_DEFUN([PY_CHECK_SQLITE_FUNC], [ AC_CHECK_LIB([sqlite3], [$1], [$2], [ m4_ifblank([$3], [have_supported_sqlite3=no], [$3]) ]) ]) WITH_SAVE_ENV([ dnl bpo-45774/GH-29507: The CPP check in AC_CHECK_HEADER can fail on FreeBSD, dnl hence CPPFLAGS instead of CFLAGS. CPPFLAGS="$CPPFLAGS $LIBSQLITE3_CFLAGS" LDFLAGS="$LIBSQLITE3_LIBS $LDFLAGS" AC_CHECK_HEADER([sqlite3.h], [ have_sqlite3=yes AC_COMPILE_IFELSE([ AC_LANG_PROGRAM([ #include #if SQLITE_VERSION_NUMBER < 3015002 # error "SQLite 3.15.2 or higher required" #endif ], []) ], [ have_supported_sqlite3=yes dnl Check that required functions are in place. A lot of stuff may be dnl omitted with SQLITE_OMIT_* compile time defines. PY_CHECK_SQLITE_FUNC([sqlite3_bind_double]) PY_CHECK_SQLITE_FUNC([sqlite3_column_decltype]) PY_CHECK_SQLITE_FUNC([sqlite3_column_double]) PY_CHECK_SQLITE_FUNC([sqlite3_complete]) PY_CHECK_SQLITE_FUNC([sqlite3_progress_handler]) PY_CHECK_SQLITE_FUNC([sqlite3_result_double]) PY_CHECK_SQLITE_FUNC([sqlite3_set_authorizer]) PY_CHECK_SQLITE_FUNC([sqlite3_trace_v2], [], [ PY_CHECK_SQLITE_FUNC([sqlite3_trace]) ]) PY_CHECK_SQLITE_FUNC([sqlite3_value_double]) AC_CHECK_LIB([sqlite3], [sqlite3_load_extension], [have_sqlite3_load_extension=yes], [have_sqlite3_load_extension=no] ) AC_CHECK_LIB([sqlite3], [sqlite3_serialize], [ AC_DEFINE( [PY_SQLITE_HAVE_SERIALIZE], [1], [Define if SQLite was compiled with the serialize API] ) ]) ], [ have_supported_sqlite3=no ]) ]) ]) dnl Check for support for loadable sqlite extensions AC_MSG_CHECKING([for --enable-loadable-sqlite-extensions]) AC_ARG_ENABLE([loadable-sqlite-extensions], AS_HELP_STRING( [--enable-loadable-sqlite-extensions], [ support loadable extensions in the sqlite3 module, see Doc/library/sqlite3.rst (default is no) ] ), [ AS_VAR_IF([have_sqlite3_load_extension], [no], [ AC_MSG_RESULT([n/a]) AC_MSG_WARN([Your version of SQLite does not support loadable extensions]) ], [ AC_MSG_RESULT([yes]) AC_DEFINE( [PY_SQLITE_ENABLE_LOAD_EXTENSION], [1], [Define to 1 to build the sqlite module with loadable extensions support.] ) ]) ], [ AC_MSG_RESULT([no]) ] ) dnl dnl Detect Tcl/Tk. Use pkg-config if available. dnl found_tcltk=no for _QUERY in \ "tcl >= 8.5.12 tk >= 8.5.12" \ "tcl8.6 tk8.6" \ "tcl86 tk86" \ "tcl8.5 >= 8.5.12 tk8.5 >= 8.5.12" \ "tcl85 >= 8.5.12 tk85 >= 8.5.12" \ ; do PKG_CHECK_EXISTS([$_QUERY], [ PKG_CHECK_MODULES([TCLTK], [$_QUERY], [found_tcltk=yes], [found_tcltk=no]) ]) AS_VAR_IF([found_tcltk], [yes], [break]) done AS_VAR_IF([found_tcltk], [no], [ TCLTK_CFLAGS=${TCLTK_CFLAGS-""} TCLTK_LIBS=${TCLTK_LIBS-""} ]) dnl FreeBSD has an X11 dependency which is not implicitly resolved. AS_CASE([$ac_sys_system], [FreeBSD*], [ PKG_CHECK_EXISTS([x11], [ PKG_CHECK_MODULES([X11], [x11], [ TCLTK_CFLAGS="$TCLTK_CFLAGS $X11_CFLAGS" TCLTK_LIBS="$TCLTK_LIBS $X11_LIBS" ]) ]) ] ) WITH_SAVE_ENV([ CPPFLAGS="$CPPFLAGS $TCLTK_CFLAGS" LIBS="$TCLTK_LIBS $LDFLAGS" AC_LINK_IFELSE([ AC_LANG_PROGRAM([ #include #include #if defined(TK_HEX_VERSION) # if TK_HEX_VERSION < 0x0805020c # error "Tk older than 8.5.12 not supported" # endif #endif #if (TCL_MAJOR_VERSION < 8) || \ ((TCL_MAJOR_VERSION == 8) && (TCL_MINOR_VERSION < 5)) || \ ((TCL_MAJOR_VERSION == 8) && (TCL_MINOR_VERSION == 5) && (TCL_RELEASE_SERIAL < 12)) # error "Tcl older than 8.5.12 not supported" #endif #if (TK_MAJOR_VERSION < 8) || \ ((TK_MAJOR_VERSION == 8) && (TK_MINOR_VERSION < 5)) || \ ((TK_MAJOR_VERSION == 8) && (TK_MINOR_VERSION == 5) && (TK_RELEASE_SERIAL < 12)) # error "Tk older than 8.5.12 not supported" #endif ], [ void *x1 = Tcl_Init; void *x2 = Tk_Init; ]) ], [ have_tcltk=yes dnl The X11/xlib.h file bundled in the Tk sources can cause function dnl prototype warnings from the compiler. Since we cannot easily fix dnl that, suppress the warnings here instead. AS_VAR_APPEND([TCLTK_CFLAGS], [" -Wno-strict-prototypes -DWITH_APPINIT=1"]) ], [ have_tcltk=no ]) ]) dnl check for _gdbmmodule dependencies dnl NOTE: gdbm does not provide a pkgconf file. AC_ARG_VAR([GDBM_CFLAGS], [C compiler flags for gdbm]) AC_ARG_VAR([GDBM_LIBS], [additional linker flags for gdbm]) WITH_SAVE_ENV([ CPPFLAGS="$CPPFLAGS $GDBM_CFLAGS" LDFLAGS="$GDBM_LIBS $LDFLAGS" AC_CHECK_HEADERS([gdbm.h], [ AC_CHECK_LIB([gdbm], [gdbm_open], [ have_gdbm=yes GDBM_LIBS=${GDBM_LIBS-"-lgdbm"} ], [have_gdbm=no]) ], [have_gdbm=no]) ]) dnl check for _dbmmodule.c dependencies dnl ndbm, gdbm_compat, libdb AC_CHECK_HEADERS([ndbm.h], [ WITH_SAVE_ENV([ AC_SEARCH_LIBS([dbm_open], [ndbm gdbm_compat]) ]) ]) AC_MSG_CHECKING([for ndbm presence and linker args]) AS_CASE([$ac_cv_search_dbm_open], [*ndbm*|*gdbm_compat*], [ dbm_ndbm="$ac_cv_search_dbm_open" have_ndbm=yes ], [none*], [ dbm_ndbm="" have_ndbm=yes ], [no], [have_ndbm=no] ) AC_MSG_RESULT([$have_ndbm ($dbm_ndbm)]) dnl "gdbm-ndbm.h" and "gdbm/ndbm.h" are both normalized to "gdbm_ndbm_h" dnl unset ac_cv_header_gdbm_ndbm_h to prevent false positive cache hits. AS_UNSET([ac_cv_header_gdbm_ndbm_h]) AC_CACHE_VAL([ac_cv_header_gdbm_slash_ndbm_h], [ AC_CHECK_HEADER( [gdbm/ndbm.h], [ac_cv_header_gdbm_slash_ndbm_h=yes], [ac_cv_header_gdbm_slash_ndbm_h=no] ) ]) AS_VAR_IF([ac_cv_header_gdbm_slash_ndbm_h], [yes], [ AC_DEFINE([HAVE_GDBM_NDBM_H], [1], [Define to 1 if you have the header file.]) ]) AS_UNSET([ac_cv_header_gdbm_ndbm_h]) AC_CACHE_VAL([ac_cv_header_gdbm_dash_ndbm_h], [ AC_CHECK_HEADER( [gdbm-ndbm.h], [ac_cv_header_gdbm_dash_ndbm_h=yes], [ac_cv_header_gdbm_dash_ndbm_h=no] ) ]) AS_VAR_IF([ac_cv_header_gdbm_dash_ndbm_h], [yes], [ AC_DEFINE([HAVE_GDBM_DASH_NDBM_H], [1], [Define to 1 if you have the header file.]) ]) AS_UNSET([ac_cv_header_gdbm_ndbm_h]) if test "$ac_cv_header_gdbm_slash_ndbm_h" = yes -o "$ac_cv_header_gdbm_dash_ndbm_h" = yes; then AS_UNSET([ac_cv_search_dbm_open]) WITH_SAVE_ENV([ AC_SEARCH_LIBS([dbm_open], [gdbm_compat], [have_gdbm_compat=yes], [have_gdbm_compat=no]) ]) fi # Check for libdb >= 5 with dbm_open() # db.h re-defines the name of the function AC_CHECK_HEADERS([db.h], [ AC_CACHE_CHECK([for libdb], [ac_cv_have_libdb], [ WITH_SAVE_ENV([ LIBS="$LIBS -ldb" AC_LINK_IFELSE([AC_LANG_PROGRAM([ #define DB_DBM_HSEARCH 1 #include #if DB_VERSION_MAJOR < 5 #error "dh.h: DB_VERSION_MAJOR < 5 is not supported." #endif ], [DBM *dbm = dbm_open(NULL, 0, 0)]) ], [ac_cv_have_libdb=yes], [ac_cv_have_libdb=no]) ]) ]) AS_VAR_IF([ac_cv_have_libdb], [yes], [ AC_DEFINE([HAVE_LIBDB], [1], [Define to 1 if you have the `db' library (-ldb).]) ]) ]) # Check for --with-dbmliborder AC_MSG_CHECKING([for --with-dbmliborder]) AC_ARG_WITH( [dbmliborder], [AS_HELP_STRING( [--with-dbmliborder=db1:db2:...], [override order to check db backends for dbm; a valid value is a colon separated string with the backend names `ndbm', `gdbm' and `bdb'.] )], [], [with_dbmliborder=gdbm:ndbm:bdb]) have_gdbm_dbmliborder=no as_save_IFS=$IFS IFS=: for db in $with_dbmliborder; do AS_CASE([$db], [ndbm], [], [gdbm], [have_gdbm_dbmliborder=yes], [bdb], [], [with_dbmliborder=error] ) done IFS=$as_save_IFS AS_VAR_IF([with_dbmliborder], [error], [ AC_MSG_ERROR([proper usage is --with-dbmliborder=db1:db2:... (gdbm:ndbm:bdb)]) ]) AC_MSG_RESULT([$with_dbmliborder]) AC_MSG_CHECKING([for _dbm module CFLAGS and LIBS]) have_dbm=no as_save_IFS=$IFS IFS=: for db in $with_dbmliborder; do case "$db" in ndbm) if test "$have_ndbm" = yes; then DBM_CFLAGS="-DUSE_NDBM" DBM_LIBS="$dbm_ndbm" have_dbm=yes break fi ;; gdbm) if test "$have_gdbm_compat" = yes; then DBM_CFLAGS="-DUSE_GDBM_COMPAT" DBM_LIBS="-lgdbm_compat" have_dbm=yes break fi ;; bdb) if test "$ac_cv_have_libdb" = yes; then DBM_CFLAGS="-DUSE_BERKDB" DBM_LIBS="-ldb" have_dbm=yes break fi ;; esac done IFS=$as_save_IFS AC_MSG_RESULT([$DBM_CFLAGS $DBM_LIBS]) # Templates for things AC_DEFINEd more than once. # For a single AC_DEFINE, no template is needed. AH_TEMPLATE([_REENTRANT], [Define to force use of thread-safe errno, h_errno, and other functions]) if test "$ac_cv_pthread_is_default" = yes then # Defining _REENTRANT on system with POSIX threads should not hurt. AC_DEFINE([_REENTRANT]) posix_threads=yes if test "$ac_sys_system" = "SunOS"; then CFLAGS="$CFLAGS -D_REENTRANT" fi elif test "$ac_cv_kpthread" = "yes" then CC="$CC -Kpthread" if test "$ac_cv_cxx_thread" = "yes"; then CXX="$CXX -Kpthread" fi posix_threads=yes elif test "$ac_cv_kthread" = "yes" then CC="$CC -Kthread" if test "$ac_cv_cxx_thread" = "yes"; then CXX="$CXX -Kthread" fi posix_threads=yes elif test "$ac_cv_pthread" = "yes" then CC="$CC -pthread" if test "$ac_cv_cxx_thread" = "yes"; then CXX="$CXX -pthread" fi posix_threads=yes else if test ! -z "$withval" -a -d "$withval" then LDFLAGS="$LDFLAGS -L$withval" fi # According to the POSIX spec, a pthreads implementation must # define _POSIX_THREADS in unistd.h. Some apparently don't # (e.g. gnu pth with pthread emulation) AC_MSG_CHECKING([for _POSIX_THREADS in unistd.h]) AX_CHECK_DEFINE([unistd.h], [_POSIX_THREADS], [unistd_defines_pthreads=yes], [unistd_defines_pthreads=no]) AC_MSG_RESULT([$unistd_defines_pthreads]) AC_DEFINE([_REENTRANT]) # Just looking for pthread_create in libpthread is not enough: # on HP/UX, pthread.h renames pthread_create to a different symbol name. # So we really have to include pthread.h, and then link. _libs=$LIBS LIBS="$LIBS -lpthread" AC_MSG_CHECKING([for pthread_create in -lpthread]) AC_LINK_IFELSE([AC_LANG_PROGRAM([[ #include #include #include void * start_routine (void *arg) { exit (0); }]], [[ pthread_create (NULL, NULL, start_routine, NULL)]])],[ AC_MSG_RESULT([yes]) posix_threads=yes ],[ LIBS=$_libs AC_CHECK_FUNC([pthread_detach], [ posix_threads=yes ],[ AC_CHECK_LIB([pthreads], [pthread_create], [ posix_threads=yes LIBS="$LIBS -lpthreads" ], [ AC_CHECK_LIB([c_r], [pthread_create], [ posix_threads=yes LIBS="$LIBS -lc_r" ], [ AC_CHECK_LIB([pthread], [__pthread_create_system], [ posix_threads=yes LIBS="$LIBS -lpthread" ], [ AC_CHECK_LIB([cma], [pthread_create], [ posix_threads=yes LIBS="$LIBS -lcma" ],[ AS_CASE([$ac_sys_system], [WASI], [posix_threads=stub], [AC_MSG_ERROR([could not find pthreads on your system])] ) ])])])])])]) AC_CHECK_LIB([mpc], [usconfig], [ LIBS="$LIBS -lmpc" ]) fi if test "$posix_threads" = "yes"; then if test "$unistd_defines_pthreads" = "no"; then AC_DEFINE([_POSIX_THREADS], [1], [Define if you have POSIX threads, and your system does not define that.]) fi # Bug 662787: Using semaphores causes unexplicable hangs on Solaris 8. case $ac_sys_system/$ac_sys_release in SunOS/5.6) AC_DEFINE([HAVE_PTHREAD_DESTRUCTOR], [1], [Defined for Solaris 2.6 bug in pthread header.]) ;; SunOS/5.8) AC_DEFINE([HAVE_BROKEN_POSIX_SEMAPHORES], [1], [Define if the Posix semaphores do not work on your system]) ;; AIX/*) AC_DEFINE([HAVE_BROKEN_POSIX_SEMAPHORES], [1], [Define if the Posix semaphores do not work on your system]) ;; NetBSD/*) AC_DEFINE([HAVE_BROKEN_POSIX_SEMAPHORES], [1], [Define if the Posix semaphores do not work on your system]) ;; esac AC_CACHE_CHECK([if PTHREAD_SCOPE_SYSTEM is supported], [ac_cv_pthread_system_supported], [AC_RUN_IFELSE([AC_LANG_SOURCE([[ #include #include void *foo(void *parm) { return NULL; } int main(void) { pthread_attr_t attr; pthread_t id; if (pthread_attr_init(&attr)) return (-1); if (pthread_attr_setscope(&attr, PTHREAD_SCOPE_SYSTEM)) return (-1); if (pthread_create(&id, &attr, foo, NULL)) return (-1); return (0); }]])], [ac_cv_pthread_system_supported=yes], [ac_cv_pthread_system_supported=no], [ac_cv_pthread_system_supported=no]) ]) if test "$ac_cv_pthread_system_supported" = "yes"; then AC_DEFINE([PTHREAD_SYSTEM_SCHED_SUPPORTED], [1], [Defined if PTHREAD_SCOPE_SYSTEM supported.]) fi AC_CHECK_FUNCS([pthread_sigmask], [case $ac_sys_system in CYGWIN*) AC_DEFINE([HAVE_BROKEN_PTHREAD_SIGMASK], [1], [Define if pthread_sigmask() does not work on your system.]) ;; esac]) AC_CHECK_FUNCS([pthread_getcpuclockid]) fi AS_VAR_IF([posix_threads], [stub], [ AC_DEFINE([HAVE_PTHREAD_STUBS], [1], [Define if platform requires stubbed pthreads support]) ]) # Check for enable-ipv6 AH_TEMPLATE([ENABLE_IPV6], [Define if --enable-ipv6 is specified]) AC_MSG_CHECKING([if --enable-ipv6 is specified]) AC_ARG_ENABLE([ipv6], [AS_HELP_STRING( [--enable-ipv6], [enable ipv6 (with ipv4) support, see Doc/library/socket.rst (default is yes if supported)] )], [ case "$enableval" in no) AC_MSG_RESULT([no]) ipv6=no ;; *) AC_MSG_RESULT([yes]) AC_DEFINE([ENABLE_IPV6]) ipv6=yes ;; esac ], [ dnl the check does not work on cross compilation case... AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ /* AF_INET6 available check */ #include @%:@include ]], [[int domain = AF_INET6;]])],[ ipv6=yes ],[ ipv6=no ]) AS_CASE([$ac_sys_system], [WASI], [ipv6=no] ) AC_MSG_RESULT([$ipv6]) if test "$ipv6" = "yes"; then AC_MSG_CHECKING([if RFC2553 API is available]) AC_COMPILE_IFELSE([ AC_LANG_PROGRAM([[#include @%:@include ]], [[struct sockaddr_in6 x; x.sin6_scope_id;]]) ],[ AC_MSG_RESULT([yes]) ipv6=yes ],[ AC_MSG_RESULT([no], [IPv6 disabled]) ipv6=no ]) fi if test "$ipv6" = "yes"; then AC_DEFINE([ENABLE_IPV6]) fi ]) ipv6type=unknown ipv6lib=none ipv6trylibc=no if test "$ipv6" = yes -a "$cross_compiling" = no; then for i in inria kame linux-glibc linux-inet6 solaris toshiba v6d zeta; do case $i in inria) dnl http://www.kame.net/ AX_CHECK_DEFINE([netinet/in.h], [IPV6_INRIA_VERSION], [ipv6type=$i]) ;; kame) dnl http://www.kame.net/ AX_CHECK_DEFINE([netinet/in.h], [__KAME__], [ipv6type=$i ipv6lib=inet6 ipv6libdir=/usr/local/v6/lib ipv6trylibc=yes]) ;; linux-glibc) dnl Advanced IPv6 support was added to glibc 2.1 in 1999. AX_CHECK_DEFINE([features.h], [__GLIBC__], [ipv6type=$i ipv6trylibc=yes]) ;; linux-inet6) dnl http://www.v6.linux.or.jp/ if test -d /usr/inet6; then ipv6type=$i ipv6lib=inet6 ipv6libdir=/usr/inet6/lib BASECFLAGS="-I/usr/inet6/include $BASECFLAGS" fi ;; solaris) if test -f /etc/netconfig; then if $GREP -q tcp6 /etc/netconfig; then ipv6type=$i ipv6trylibc=yes fi fi ;; toshiba) AX_CHECK_DEFINE([sys/param.h], [_TOSHIBA_INET6], [ipv6type=$i ipv6lib=inet6 ipv6libdir=/usr/local/v6/lib]) ;; v6d) AX_CHECK_DEFINE([/usr/local/v6/include/sys/v6config.h], [__V6D__], [ipv6type=$i ipv6lib=v6 ipv6libdir=/usr/local/v6/lib BASECFLAGS="-I/usr/local/v6/include $BASECFLAGS"]) ;; zeta) AX_CHECK_DEFINE([sys/param.h], [_ZETA_MINAMI_INET6], [ipv6type=$i ipv6lib=inet6 ipv6libdir=/usr/local/v6/lib]) ;; esac if test "$ipv6type" != "unknown"; then break fi done AC_MSG_CHECKING([ipv6 stack type]) AC_MSG_RESULT([$ipv6type]) fi if test "$ipv6" = "yes" -a "$ipv6lib" != "none"; then AC_MSG_CHECKING([ipv6 library]) if test -d $ipv6libdir -a -f $ipv6libdir/lib$ipv6lib.a; then LIBS="-L$ipv6libdir -l$ipv6lib $LIBS" AC_MSG_RESULT([lib$ipv6lib]) else AS_VAR_IF([ipv6trylibc], [yes], [ AC_MSG_RESULT([libc]) ], [ AC_MSG_ERROR([m4_normalize([ No $ipv6lib library found; cannot continue. You need to fetch lib$ipv6lib.a from appropriate ipv6 kit and compile beforehand. ])]) ]) fi fi AC_CACHE_CHECK([CAN_RAW_FD_FRAMES], [ac_cv_can_raw_fd_frames], [ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ /* CAN_RAW_FD_FRAMES available check */ @%:@include ]], [[int can_raw_fd_frames = CAN_RAW_FD_FRAMES;]])], [ac_cv_can_raw_fd_frames=yes], [ac_cv_can_raw_fd_frames=no]) ]) AS_VAR_IF([ac_cv_can_raw_fd_frames], [yes], [ AC_DEFINE([HAVE_LINUX_CAN_RAW_FD_FRAMES], [1], [Define if compiling using Linux 3.6 or later.]) ]) AC_CACHE_CHECK([for CAN_RAW_JOIN_FILTERS], [ac_cv_can_raw_join_filters], [ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ @%:@include ]], [[int can_raw_join_filters = CAN_RAW_JOIN_FILTERS;]])], [ac_cv_can_raw_join_filters=yes], [ac_cv_can_raw_join_filters=no]) ]) AS_VAR_IF([ac_cv_can_raw_join_filters], [yes], [ AC_DEFINE([HAVE_LINUX_CAN_RAW_JOIN_FILTERS], [1], [Define if compiling using Linux 4.1 or later.]) ]) # Check for --with-doc-strings AC_MSG_CHECKING([for --with-doc-strings]) AC_ARG_WITH( [doc-strings], [AS_HELP_STRING([--with-doc-strings], [enable documentation strings (default is yes)])]) if test -z "$with_doc_strings" then with_doc_strings="yes" fi if test "$with_doc_strings" != "no" then AC_DEFINE([WITH_DOC_STRINGS], [1], [Define if you want documentation strings in extension modules]) fi AC_MSG_RESULT([$with_doc_strings]) # Check for stdatomic.h, required for mimalloc. AC_CACHE_CHECK([for stdatomic.h], [ac_cv_header_stdatomic_h], [ AC_LINK_IFELSE( [ AC_LANG_SOURCE([[ #include atomic_int int_var; atomic_uintptr_t uintptr_var; int main() { atomic_store_explicit(&int_var, 5, memory_order_relaxed); atomic_store_explicit(&uintptr_var, 0, memory_order_relaxed); int loaded_value = atomic_load_explicit(&int_var, memory_order_seq_cst); return 0; } ]]) ],[ac_cv_header_stdatomic_h=yes],[ac_cv_header_stdatomic_h=no]) ]) AS_VAR_IF([ac_cv_header_stdatomic_h], [yes], [ AC_DEFINE(HAVE_STD_ATOMIC, 1, [Has stdatomic.h with atomic_int and atomic_uintptr_t]) ]) # Check for GCC >= 4.7 and clang __atomic builtin functions AC_CACHE_CHECK([for builtin __atomic_load_n and __atomic_store_n functions], [ac_cv_builtin_atomic], [ AC_LINK_IFELSE( [ AC_LANG_SOURCE([[ int val; int main() { __atomic_store_n(&val, 1, __ATOMIC_SEQ_CST); (void)__atomic_load_n(&val, __ATOMIC_SEQ_CST); return 0; } ]]) ],[ac_cv_builtin_atomic=yes],[ac_cv_builtin_atomic=no]) ]) AS_VAR_IF([ac_cv_builtin_atomic], [yes], [ AC_DEFINE(HAVE_BUILTIN_ATOMIC, 1, [Has builtin __atomic_load_n() and __atomic_store_n() functions]) ]) # --with-mimalloc AC_MSG_CHECKING([for --with-mimalloc]) AC_ARG_WITH([mimalloc], [AS_HELP_STRING([--with-mimalloc], [build with mimalloc memory allocator (default is yes if C11 stdatomic.h is available.)])], [], [with_mimalloc="$ac_cv_header_stdatomic_h"] ) if test "$with_mimalloc" != no; then if test "$ac_cv_header_stdatomic_h" != yes; then # mimalloc-atomic.h wants C11 stdatomic.h on POSIX AC_MSG_ERROR([mimalloc requires stdatomic.h, use --without-mimalloc to disable mimalloc.]) fi with_mimalloc=yes AC_DEFINE([WITH_MIMALLOC], [1], [Define if you want to compile in mimalloc memory allocator.]) AC_SUBST([MIMALLOC_HEADERS], ['$(MIMALLOC_HEADERS)']) elif test "$disable_gil" = "yes"; then AC_MSG_ERROR([--disable-gil requires mimalloc memory allocator (--with-mimalloc).]) fi AC_MSG_RESULT([$with_mimalloc]) AC_SUBST([INSTALL_MIMALLOC], [$with_mimalloc]) AC_SUBST([MIMALLOC_HEADERS]) # Check for Python-specific malloc support AC_MSG_CHECKING([for --with-pymalloc]) AC_ARG_WITH( [pymalloc], [AS_HELP_STRING([--with-pymalloc], [enable specialized mallocs (default is yes)])]) if test -z "$with_pymalloc" then dnl default to yes except for wasm32-emscripten and wasm32-wasi. AS_CASE([$ac_sys_system], [Emscripten], [with_pymalloc="no"], [WASI], [with_pymalloc="no"], [with_pymalloc="yes"] ) fi if test "$with_pymalloc" != "no" then AC_DEFINE([WITH_PYMALLOC], [1], [Define if you want to compile in Python-specific mallocs]) fi AC_MSG_RESULT([$with_pymalloc]) # Check for --with-c-locale-coercion AC_MSG_CHECKING([for --with-c-locale-coercion]) AC_ARG_WITH( [c-locale-coercion], [AS_HELP_STRING([--with-c-locale-coercion], [enable C locale coercion to a UTF-8 based locale (default is yes)])]) if test -z "$with_c_locale_coercion" then with_c_locale_coercion="yes" fi if test "$with_c_locale_coercion" != "no" then AC_DEFINE([PY_COERCE_C_LOCALE], [1], [Define if you want to coerce the C locale to a UTF-8 based locale]) fi AC_MSG_RESULT([$with_c_locale_coercion]) # Check for Valgrind support AC_MSG_CHECKING([for --with-valgrind]) AC_ARG_WITH( [valgrind], [AS_HELP_STRING([--with-valgrind], [enable Valgrind support (default is no)])], [], [with_valgrind=no] ) AC_MSG_RESULT([$with_valgrind]) if test "$with_valgrind" != no; then AC_CHECK_HEADER([valgrind/valgrind.h], [AC_DEFINE([WITH_VALGRIND], 1, [Define if you want pymalloc to be disabled when running under valgrind])], [AC_MSG_ERROR([Valgrind support requested but headers not available])] ) OPT="-DDYNAMIC_ANNOTATIONS_ENABLED=1 $OPT" fi # Check for DTrace support AC_MSG_CHECKING([for --with-dtrace]) AC_ARG_WITH( [dtrace], [AS_HELP_STRING([--with-dtrace], [enable DTrace support (default is no)])], [], [with_dtrace=no]) AC_MSG_RESULT([$with_dtrace]) AC_SUBST([DTRACE]) AC_SUBST([DFLAGS]) AC_SUBST([DTRACE_HEADERS]) AC_SUBST([DTRACE_OBJS]) DTRACE= DTRACE_HEADERS= DTRACE_OBJS= if test "$with_dtrace" = "yes" then AC_PATH_PROG([DTRACE], [dtrace], [not found]) if test "$DTRACE" = "not found"; then AC_MSG_ERROR([dtrace command not found on \$PATH]) fi AC_DEFINE([WITH_DTRACE], [1], [Define if you want to compile in DTrace support]) DTRACE_HEADERS="Include/pydtrace_probes.h" # On OS X, DTrace providers do not need to be explicitly compiled and # linked into the binary. Correspondingly, dtrace(1) is missing the ELF # generation flag '-G'. We check for presence of this flag, rather than # hardcoding support by OS, in the interest of robustness. AC_CACHE_CHECK([whether DTrace probes require linking], [ac_cv_dtrace_link], [dnl ac_cv_dtrace_link=no echo 'BEGIN{}' > conftest.d "$DTRACE" $DFLAGS -G -s conftest.d -o conftest.o > /dev/null 2>&1 && \ ac_cv_dtrace_link=yes ]) if test "$ac_cv_dtrace_link" = "yes"; then DTRACE_OBJS="Python/pydtrace.o" fi fi dnl Platform-specific C and header files. PLATFORM_HEADERS= PLATFORM_OBJS= AS_CASE([$ac_sys_system], [Emscripten], [ AS_VAR_APPEND([PLATFORM_OBJS], [' Python/emscripten_signal.o Python/emscripten_trampoline.o']) AS_VAR_APPEND([PLATFORM_HEADERS], [' $(srcdir)/Include/internal/pycore_emscripten_signal.h $(srcdir)/Include/internal/pycore_emscripten_trampoline.h']) ], ) AC_SUBST([PLATFORM_HEADERS]) AC_SUBST([PLATFORM_OBJS]) # -I${DLINCLDIR} is added to the compile rule for importdl.o AC_SUBST([DLINCLDIR]) DLINCLDIR=. # the dlopen() function means we might want to use dynload_shlib.o. some # platforms have dlopen(), but don't want to use it. AC_CHECK_FUNCS([dlopen]) # DYNLOADFILE specifies which dynload_*.o file we will use for dynamic # loading of modules. AC_SUBST([DYNLOADFILE]) AC_MSG_CHECKING([DYNLOADFILE]) if test -z "$DYNLOADFILE" then case $ac_sys_system/$ac_sys_release in hp*|HP*) DYNLOADFILE="dynload_hpux.o";; *) # use dynload_shlib.c and dlopen() if we have it; otherwise stub # out any dynamic loading if test "$ac_cv_func_dlopen" = yes then DYNLOADFILE="dynload_shlib.o" else DYNLOADFILE="dynload_stub.o" fi ;; esac fi AC_MSG_RESULT([$DYNLOADFILE]) if test "$DYNLOADFILE" != "dynload_stub.o" then AC_DEFINE([HAVE_DYNAMIC_LOADING], [1], [Defined when any dynamic module loading is enabled.]) fi # MACHDEP_OBJS can be set to platform-specific object files needed by Python AC_SUBST([MACHDEP_OBJS]) AC_MSG_CHECKING([MACHDEP_OBJS]) if test -z "$MACHDEP_OBJS" then MACHDEP_OBJS=$extra_machdep_objs else MACHDEP_OBJS="$MACHDEP_OBJS $extra_machdep_objs" fi if test -z "$MACHDEP_OBJS"; then AC_MSG_RESULT([none]) else AC_MSG_RESULT([$MACHDEP_OBJS]) fi if test "$ac_sys_system" = "Linux-android"; then # When these functions are used in an unprivileged process, they crash rather # than returning an error. blocked_funcs="chroot initgroups setegid seteuid setgid sethostname setregid setresgid setresuid setreuid setuid" # These functions are unimplemented and always return an error # (https://android.googlesource.com/platform/system/sepolicy/+/refs/heads/android13-release/public/domain.te#1044) blocked_funcs="$blocked_funcs sem_open sem_unlink" # Before API level 23, when fchmodat is called with the unimplemented flag # AT_SYMLINK_NOFOLLOW, instead of returning ENOTSUP as it should, it actually # follows the symlink. if test "$ANDROID_API_LEVEL" -lt 23; then blocked_funcs="$blocked_funcs fchmodat" fi for name in $blocked_funcs; do AS_VAR_PUSHDEF([func_var], [ac_cv_func_$name]) AS_VAR_SET([func_var], [no]) AS_VAR_POPDEF([func_var]) done fi # checks for library functions AC_CHECK_FUNCS([ \ accept4 alarm bind_textdomain_codeset chmod chown clock closefrom close_range confstr \ copy_file_range ctermid dup dup3 execv explicit_bzero explicit_memset \ faccessat fchmod fchmodat fchown fchownat fdopendir fdwalk fexecve \ fork fork1 fpathconf fstatat ftime ftruncate futimens futimes futimesat \ gai_strerror getegid geteuid getgid getgrent getgrgid getgrgid_r \ getgrnam_r getgrouplist gethostname getitimer getloadavg getlogin \ getpeername getpgid getpid getppid getpriority _getpty \ getpwent getpwnam_r getpwuid getpwuid_r getresgid getresuid getrusage getsid getspent \ getspnam getuid getwd grantpt if_nameindex initgroups kill killpg lchown linkat \ lockf lstat lutimes madvise mbrtowc memrchr mkdirat mkfifo mkfifoat \ mknod mknodat mktime mmap mremap nice openat opendir pathconf pause pipe \ pipe2 plock poll posix_fadvise posix_fallocate posix_openpt posix_spawn posix_spawnp \ posix_spawn_file_actions_addclosefrom_np \ pread preadv preadv2 process_vm_readv pthread_cond_timedwait_relative_np pthread_condattr_setclock pthread_init \ pthread_kill ptsname ptsname_r pwrite pwritev pwritev2 readlink readlinkat readv realpath renameat \ rtpSpawn sched_get_priority_max sched_rr_get_interval sched_setaffinity \ sched_setparam sched_setscheduler sem_clockwait sem_getvalue sem_open \ sem_timedwait sem_unlink sendfile setegid seteuid setgid sethostname \ setitimer setlocale setpgid setpgrp setpriority setregid setresgid \ setresuid setreuid setsid setuid setvbuf shutdown sigaction sigaltstack \ sigfillset siginterrupt sigpending sigrelse sigtimedwait sigwait \ sigwaitinfo snprintf splice strftime strlcpy strsignal symlinkat sync \ sysconf tcgetpgrp tcsetpgrp tempnam timegm times tmpfile \ tmpnam tmpnam_r truncate ttyname umask uname unlinkat unlockpt utimensat utimes vfork \ wait wait3 wait4 waitid waitpid wcscoll wcsftime wcsxfrm wmemcmp writev \ ]) # Force lchmod off for Linux. Linux disallows changing the mode of symbolic # links. Some libc implementations have a stub lchmod implementation that always # returns an error. if test "$MACHDEP" != linux; then AC_CHECK_FUNCS([lchmod]) fi # iOS defines some system methods that can be linked (so they are # found by configure), but either raise a compilation error (because the # header definition prevents usage - autoconf doesn't use the headers), or # raise an error if used at runtime. Force these symbols off. if test "$ac_sys_system" != "iOS" ; then AC_CHECK_FUNCS([getentropy getgroups system]) fi AC_CHECK_DECL([dirfd], [AC_DEFINE([HAVE_DIRFD], [1], [Define if you have the 'dirfd' function or macro.])], [], [@%:@include @%:@include ]) # For some functions, having a definition is not sufficient, since # we want to take their address. PY_CHECK_FUNC([chroot], [@%:@include ]) PY_CHECK_FUNC([link], [@%:@include ]) PY_CHECK_FUNC([symlink], [@%:@include ]) PY_CHECK_FUNC([fchdir], [@%:@include ]) PY_CHECK_FUNC([fsync], [@%:@include ]) PY_CHECK_FUNC([fdatasync], [@%:@include ]) PY_CHECK_FUNC([epoll_create], [@%:@include ], [HAVE_EPOLL]) PY_CHECK_FUNC([epoll_create1], [@%:@include ]) PY_CHECK_FUNC([kqueue],[ #include #include ]) PY_CHECK_FUNC([prlimit], [ #include #include ]) PY_CHECK_FUNC([_dyld_shared_cache_contains_path], [@%:@include ], [HAVE_DYLD_SHARED_CACHE_CONTAINS_PATH]) PY_CHECK_FUNC([memfd_create], [ #ifdef HAVE_SYS_MMAN_H #include #endif #ifdef HAVE_SYS_MEMFD_H #include #endif ]) PY_CHECK_FUNC([eventfd], [ #ifdef HAVE_SYS_EVENTFD_H #include #endif ]) PY_CHECK_FUNC([timerfd_create], [ #ifdef HAVE_SYS_TIMERFD_H #include #endif ], [HAVE_TIMERFD_CREATE]) # On some systems (eg. FreeBSD 5), we would find a definition of the # functions ctermid_r, setgroups in the library, but no prototype # (e.g. because we use _XOPEN_SOURCE). See whether we can take their # address to avoid compiler warnings and potential miscompilations # because of the missing prototypes. PY_CHECK_FUNC([ctermid_r], [@%:@include ]) AC_CACHE_CHECK([for flock declaration], [ac_cv_flock_decl], [AC_COMPILE_IFELSE( [AC_LANG_PROGRAM( [@%:@include ], [void* p = flock] )], [ac_cv_flock_decl=yes], [ac_cv_flock_decl=no] ) ]) dnl Linking with libbsd may be necessary on AIX for flock function. AS_VAR_IF([ac_cv_flock_decl], [yes], [AC_CHECK_FUNCS([flock], [], [AC_CHECK_LIB([bsd], [flock], [FCNTL_LIBS="-lbsd"])])]) PY_CHECK_FUNC([getpagesize], [@%:@include ]) AC_CACHE_CHECK([for broken unsetenv], [ac_cv_broken_unsetenv], [AC_COMPILE_IFELSE( [AC_LANG_PROGRAM( [@%:@include ], [int res = unsetenv("DUMMY")])], [ac_cv_broken_unsetenv=no], [ac_cv_broken_unsetenv=yes] ) ]) AS_VAR_IF([ac_cv_broken_unsetenv], [yes], [ AC_DEFINE([HAVE_BROKEN_UNSETENV], [1], [Define if 'unsetenv' does not return an int.]) ]) dnl check for true AC_CHECK_PROGS([TRUE], [true], [/bin/true]) dnl On some systems (e.g. Solaris 9), hstrerror and inet_aton are in -lresolv dnl On others, they are in the C library, so we to take no action AC_CHECK_LIB([c], [inet_aton], [$ac_cv_prog_TRUE], AC_CHECK_LIB([resolv], [inet_aton]) ) # On Tru64, chflags seems to be present, but calling it will # exit Python AC_CACHE_CHECK([for chflags], [ac_cv_have_chflags], [dnl AC_RUN_IFELSE([AC_LANG_SOURCE([[ #include #include int main(int argc, char *argv[]) { if(chflags(argv[0], 0) != 0) return 1; return 0; } ]])], [ac_cv_have_chflags=yes], [ac_cv_have_chflags=no], [ac_cv_have_chflags=cross]) ]) if test "$ac_cv_have_chflags" = cross ; then AC_CHECK_FUNC([chflags], [ac_cv_have_chflags="yes"], [ac_cv_have_chflags="no"]) fi if test "$ac_cv_have_chflags" = yes ; then AC_DEFINE([HAVE_CHFLAGS], [1], [Define to 1 if you have the 'chflags' function.]) fi AC_CACHE_CHECK([for lchflags], [ac_cv_have_lchflags], [dnl AC_RUN_IFELSE([AC_LANG_SOURCE([[ #include #include int main(int argc, char *argv[]) { if(lchflags(argv[0], 0) != 0) return 1; return 0; } ]])],[ac_cv_have_lchflags=yes],[ac_cv_have_lchflags=no],[ac_cv_have_lchflags=cross]) ]) if test "$ac_cv_have_lchflags" = cross ; then AC_CHECK_FUNC([lchflags], [ac_cv_have_lchflags="yes"], [ac_cv_have_lchflags="no"]) fi if test "$ac_cv_have_lchflags" = yes ; then AC_DEFINE([HAVE_LCHFLAGS], [1], [Define to 1 if you have the 'lchflags' function.]) fi dnl Check for compression libraries AH_TEMPLATE([HAVE_ZLIB_COPY], [Define if the zlib library has inflateCopy]) dnl detect zlib from Emscripten emport PY_CHECK_EMSCRIPTEN_PORT([ZLIB], [-sUSE_ZLIB]) PKG_CHECK_MODULES([ZLIB], [zlib >= 1.2.0], [ have_zlib=yes dnl zlib 1.2.0 (2003) added inflateCopy AC_DEFINE([HAVE_ZLIB_COPY], [1]) ], [ WITH_SAVE_ENV([ CPPFLAGS="$CPPFLAGS $ZLIB_CFLAGS" LDFLAGS="$LDFLAGS $ZLIB_LIBS" AC_CHECK_HEADERS([zlib.h], [ PY_CHECK_LIB([z], [gzread], [have_zlib=yes], [have_zlib=no]) ], [have_zlib=no]) AS_VAR_IF([have_zlib], [yes], [ ZLIB_CFLAGS=${ZLIB_CFLAGS-""} ZLIB_LIBS=${ZLIB_LIBS-"-lz"} PY_CHECK_LIB([z], [inflateCopy], [AC_DEFINE([HAVE_ZLIB_COPY], [1])]) ]) ]) ]) dnl binascii can use zlib for optimized crc32. AS_VAR_IF([have_zlib], [yes], [ BINASCII_CFLAGS="-DUSE_ZLIB_CRC32 $ZLIB_CFLAGS" BINASCII_LIBS="$ZLIB_LIBS" ]) dnl detect bzip2 from Emscripten emport PY_CHECK_EMSCRIPTEN_PORT([BZIP2], [-sUSE_BZIP2]) PKG_CHECK_MODULES([BZIP2], [bzip2], [have_bzip2=yes], [ WITH_SAVE_ENV([ CPPFLAGS="$CPPFLAGS $BZIP2_CFLAGS" LDFLAGS="$LDFLAGS $BZIP2_LIBS" AC_CHECK_HEADERS([bzlib.h], [ AC_CHECK_LIB([bz2], [BZ2_bzCompress], [have_bzip2=yes], [have_bzip2=no]) ], [have_bzip2=no]) AS_VAR_IF([have_bzip2], [yes], [ BZIP2_CFLAGS=${BZIP2_CFLAGS-""} BZIP2_LIBS=${BZIP2_LIBS-"-lbz2"} ]) ]) ]) PKG_CHECK_MODULES([LIBLZMA], [liblzma], [have_liblzma=yes], [ WITH_SAVE_ENV([ CPPFLAGS="$CPPFLAGS $LIBLZMA_CFLAGS" LDFLAGS="$LDFLAGS $LIBLZMA_LIBS" AC_CHECK_HEADERS([lzma.h], [ AC_CHECK_LIB([lzma], [lzma_easy_encoder], [have_liblzma=yes], [have_liblzma=no]) ], [have_liblzma=no]) AS_VAR_IF([have_liblzma], [yes], [ LIBLZMA_CFLAGS=${LIBLZMA_CFLAGS-""} LIBLZMA_LIBS=${LIBLZMA_LIBS-"-llzma"} ]) ]) ]) dnl PY_CHECK_NETDB_FUNC(FUNCTION) AC_DEFUN([PY_CHECK_NETDB_FUNC], [PY_CHECK_FUNC([$1], [@%:@include ])]) PY_CHECK_NETDB_FUNC([hstrerror]) dnl not available in WASI yet PY_CHECK_NETDB_FUNC([getservbyname]) PY_CHECK_NETDB_FUNC([getservbyport]) PY_CHECK_NETDB_FUNC([gethostbyname]) PY_CHECK_NETDB_FUNC([gethostbyaddr]) PY_CHECK_NETDB_FUNC([getprotobyname]) dnl PY_CHECK_SOCKET_FUNC(FUNCTION) AC_DEFUN([PY_CHECK_SOCKET_FUNC], [PY_CHECK_FUNC([$1], [ #include #include #include #include ])]) PY_CHECK_SOCKET_FUNC([inet_aton]) PY_CHECK_SOCKET_FUNC([inet_ntoa]) PY_CHECK_SOCKET_FUNC([inet_pton]) dnl not available in WASI yet PY_CHECK_SOCKET_FUNC([getpeername]) PY_CHECK_SOCKET_FUNC([getsockname]) PY_CHECK_SOCKET_FUNC([accept]) PY_CHECK_SOCKET_FUNC([bind]) PY_CHECK_SOCKET_FUNC([connect]) PY_CHECK_SOCKET_FUNC([listen]) PY_CHECK_SOCKET_FUNC([recvfrom]) PY_CHECK_SOCKET_FUNC([sendto]) PY_CHECK_SOCKET_FUNC([setsockopt]) PY_CHECK_SOCKET_FUNC([socket]) # On some systems, setgroups is in unistd.h, on others, in grp.h PY_CHECK_FUNC([setgroups], [ #include #ifdef HAVE_GRP_H #include #endif ]) # check for openpty, login_tty, and forkpty AC_CHECK_FUNCS([openpty], [], [AC_CHECK_LIB([util], [openpty], [AC_DEFINE([HAVE_OPENPTY]) LIBS="$LIBS -lutil"], [AC_CHECK_LIB([bsd], [openpty], [AC_DEFINE([HAVE_OPENPTY]) LIBS="$LIBS -lbsd"])])]) AC_SEARCH_LIBS([login_tty], [util], [AC_DEFINE([HAVE_LOGIN_TTY], [1], [Define to 1 if you have the `login_tty' function.])] ) AC_CHECK_FUNCS([forkpty], [], [AC_CHECK_LIB([util], [forkpty], [AC_DEFINE([HAVE_FORKPTY]) LIBS="$LIBS -lutil"], [AC_CHECK_LIB([bsd], [forkpty], [AC_DEFINE([HAVE_FORKPTY]) LIBS="$LIBS -lbsd"])])]) # check for long file support functions AC_CHECK_FUNCS([fseek64 fseeko fstatvfs ftell64 ftello statvfs]) AC_REPLACE_FUNCS([dup2]) AC_CHECK_FUNCS([getpgrp], [AC_COMPILE_IFELSE( [AC_LANG_PROGRAM([@%:@include ], [getpgrp(0);])], [AC_DEFINE([GETPGRP_HAVE_ARG], [1], [Define if getpgrp() must be called as getpgrp(0).])], [])]) AC_CHECK_FUNCS([setpgrp], [AC_COMPILE_IFELSE( [AC_LANG_PROGRAM([@%:@include ], [setpgrp(0,0);])], [AC_DEFINE([SETPGRP_HAVE_ARG], [1], [Define if setpgrp() must be called as setpgrp(0, 0).])], [])]) # check for namespace functions AC_CHECK_FUNCS([setns unshare]) AC_CHECK_FUNCS([clock_gettime], [], [ AC_CHECK_LIB([rt], [clock_gettime], [ LIBS="$LIBS -lrt" AC_DEFINE([HAVE_CLOCK_GETTIME], [1]) AC_DEFINE([TIMEMODULE_LIB], [rt], [Library needed by timemodule.c: librt may be needed for clock_gettime()]) ]) ]) AC_CHECK_FUNCS([clock_getres], [], [ AC_CHECK_LIB([rt], [clock_getres], [ AC_DEFINE([HAVE_CLOCK_GETRES], [1]) ]) ]) # On Android and iOS, clock_settime can be linked (so it is found by # configure), but when used in an unprivileged process, it crashes rather than # returning an error. Force the symbol off. if test "$ac_sys_system" != "Linux-android" && test "$ac_sys_system" != "iOS" then AC_CHECK_FUNCS([clock_settime], [], [ AC_CHECK_LIB([rt], [clock_settime], [ AC_DEFINE([HAVE_CLOCK_SETTIME], [1]) ]) ]) fi # On Android before API level 23, clock_nanosleep returns the wrong value when # interrupted by a signal (https://issuetracker.google.com/issues/216495770). if ! { test "$ac_sys_system" = "Linux-android" && test "$ANDROID_API_LEVEL" -lt 23; }; then AC_CHECK_FUNCS([clock_nanosleep], [], [ AC_CHECK_LIB([rt], [clock_nanosleep], [ AC_DEFINE([HAVE_CLOCK_NANOSLEEP], [1]) ]) ]) fi AC_CHECK_FUNCS([nanosleep], [], [ AC_CHECK_LIB([rt], [nanosleep], [ AC_DEFINE([HAVE_NANOSLEEP], [1]) ]) ]) AC_CACHE_CHECK([for major, minor, and makedev], [ac_cv_device_macros], [ AC_LINK_IFELSE([AC_LANG_PROGRAM([[ #if defined(MAJOR_IN_MKDEV) #include #elif defined(MAJOR_IN_SYSMACROS) #include #include #else #include #endif ]], [[ makedev(major(0),minor(0)); ]])],[ac_cv_device_macros=yes], [ac_cv_device_macros=no]) ]) AS_VAR_IF([ac_cv_device_macros], [yes], [ AC_DEFINE([HAVE_DEVICE_MACROS], [1], [Define to 1 if you have the device macros.]) ]) dnl no longer used, now always defined for backwards compatibility AC_DEFINE([SYS_SELECT_WITH_SYS_TIME], [1], [Define if you can safely include both and (which you can't on SCO ODT 3.0).]) # On OSF/1 V5.1, getaddrinfo is available, but a define # for [no]getaddrinfo in netdb.h. AC_CACHE_CHECK([for getaddrinfo], [ac_cv_func_getaddrinfo], [ AC_LINK_IFELSE([AC_LANG_PROGRAM([[ #include #include #include #include ]], [[getaddrinfo(NULL, NULL, NULL, NULL);]])], [ac_cv_func_getaddrinfo=yes], [ac_cv_func_getaddrinfo=no]) ]) AS_VAR_IF([ac_cv_func_getaddrinfo], [yes], [ AC_CACHE_CHECK([getaddrinfo bug], [ac_cv_buggy_getaddrinfo], AC_RUN_IFELSE([AC_LANG_SOURCE([[[ #include #include #include #include #include #include int main(void) { int passive, gaierr, inet4 = 0, inet6 = 0; struct addrinfo hints, *ai, *aitop; char straddr[INET6_ADDRSTRLEN], strport[16]; for (passive = 0; passive <= 1; passive++) { memset(&hints, 0, sizeof(hints)); hints.ai_family = AF_UNSPEC; hints.ai_flags = passive ? AI_PASSIVE : 0; hints.ai_socktype = SOCK_STREAM; hints.ai_protocol = IPPROTO_TCP; if ((gaierr = getaddrinfo(NULL, "54321", &hints, &aitop)) != 0) { (void)gai_strerror(gaierr); goto bad; } for (ai = aitop; ai; ai = ai->ai_next) { if (ai->ai_addr == NULL || ai->ai_addrlen == 0 || getnameinfo(ai->ai_addr, ai->ai_addrlen, straddr, sizeof(straddr), strport, sizeof(strport), NI_NUMERICHOST|NI_NUMERICSERV) != 0) { goto bad; } switch (ai->ai_family) { case AF_INET: if (strcmp(strport, "54321") != 0) { goto bad; } if (passive) { if (strcmp(straddr, "0.0.0.0") != 0) { goto bad; } } else { if (strcmp(straddr, "127.0.0.1") != 0) { goto bad; } } inet4++; break; case AF_INET6: if (strcmp(strport, "54321") != 0) { goto bad; } if (passive) { if (strcmp(straddr, "::") != 0) { goto bad; } } else { if (strcmp(straddr, "::1") != 0) { goto bad; } } inet6++; break; case AF_UNSPEC: goto bad; break; default: /* another family support? */ break; } } freeaddrinfo(aitop); aitop = NULL; } if (!(inet4 == 0 || inet4 == 2)) goto bad; if (!(inet6 == 0 || inet6 == 2)) goto bad; if (aitop) freeaddrinfo(aitop); return 0; bad: if (aitop) freeaddrinfo(aitop); return 1; } ]]])], [ac_cv_buggy_getaddrinfo=no], [ac_cv_buggy_getaddrinfo=yes], [ if test "$ac_sys_system" = "Linux-android" || test "$ac_sys_system" = "iOS"; then ac_cv_buggy_getaddrinfo="no" elif test "${enable_ipv6+set}" = set; then ac_cv_buggy_getaddrinfo="no -- configured with --(en|dis)able-ipv6" else ac_cv_buggy_getaddrinfo=yes fi])) dnl if ac_cv_func_getaddrinfo ]) if test "$ac_cv_func_getaddrinfo" = no -o "$ac_cv_buggy_getaddrinfo" = yes then AS_VAR_IF([ipv6], [yes], [ AC_MSG_ERROR([m4_normalize([ You must get working getaddrinfo() function or pass the "--disable-ipv6" option to configure. ])]) ]) else AC_DEFINE([HAVE_GETADDRINFO], [1], [Define if you have the getaddrinfo function.]) fi AC_CHECK_FUNCS([getnameinfo]) # checks for structures AC_STRUCT_TM AC_STRUCT_TIMEZONE AC_CHECK_MEMBERS([struct stat.st_rdev]) AC_CHECK_MEMBERS([struct stat.st_blksize]) AC_CHECK_MEMBERS([struct stat.st_flags]) AC_CHECK_MEMBERS([struct stat.st_gen]) AC_CHECK_MEMBERS([struct stat.st_birthtime]) AC_CHECK_MEMBERS([struct stat.st_blocks]) AC_CHECK_MEMBERS([struct passwd.pw_gecos, struct passwd.pw_passwd], [], [], [[ #include #include ]]) # Issue #21085: In Cygwin, siginfo_t does not have si_band field. AC_CHECK_MEMBERS([siginfo_t.si_band], [], [], [[@%:@include ]]) AC_CACHE_CHECK([for time.h that defines altzone], [ac_cv_header_time_altzone], [ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[@%:@include ]], [[return altzone;]])], [ac_cv_header_time_altzone=yes], [ac_cv_header_time_altzone=no]) ]) if test $ac_cv_header_time_altzone = yes; then AC_DEFINE([HAVE_ALTZONE], [1], [Define this if your time.h defines altzone.]) fi AC_CACHE_CHECK([for addrinfo], [ac_cv_struct_addrinfo], AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[@%:@include ]], [[struct addrinfo a]])], [ac_cv_struct_addrinfo=yes], [ac_cv_struct_addrinfo=no])) if test $ac_cv_struct_addrinfo = yes; then AC_DEFINE([HAVE_ADDRINFO], [1], [struct addrinfo (netdb.h)]) fi AC_CACHE_CHECK([for sockaddr_storage], [ac_cv_struct_sockaddr_storage], AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ # include @%:@ include ]], [[struct sockaddr_storage s]])], [ac_cv_struct_sockaddr_storage=yes], [ac_cv_struct_sockaddr_storage=no])) if test $ac_cv_struct_sockaddr_storage = yes; then AC_DEFINE([HAVE_SOCKADDR_STORAGE], [1], [struct sockaddr_storage (sys/socket.h)]) fi AC_CACHE_CHECK([for sockaddr_alg], [ac_cv_struct_sockaddr_alg], AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ # include # include @%:@ include ]], [[struct sockaddr_alg s]])], [ac_cv_struct_sockaddr_alg=yes], [ac_cv_struct_sockaddr_alg=no])) if test $ac_cv_struct_sockaddr_alg = yes; then AC_DEFINE([HAVE_SOCKADDR_ALG], [1], [struct sockaddr_alg (linux/if_alg.h)]) fi # checks for compiler characteristics AC_C_CONST AC_CACHE_CHECK([for working signed char], [ac_cv_working_signed_char_c], [ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[signed char c;]])], [ac_cv_working_signed_char_c=yes], [ac_cv_working_signed_char_c=no]) ]) AS_VAR_IF([ac_cv_working_signed_char_c], [no], [ AC_DEFINE([signed], [], [Define to empty if the keyword does not work.]) ]) AC_CACHE_CHECK([for prototypes], [ac_cv_function_prototypes], [ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[int foo(int x) { return 0; }]], [[return foo(10);]])], [ac_cv_function_prototypes=yes], [ac_cv_function_prototypes=no]) ]) AS_VAR_IF([ac_cv_function_prototypes], [yes], [ AC_DEFINE([HAVE_PROTOTYPES], [1], [Define if your compiler supports function prototype]) ]) # check for socketpair PY_CHECK_FUNC([socketpair], [ #include #include ]) # check if sockaddr has sa_len member AC_CACHE_CHECK([if sockaddr has sa_len member], [ac_cv_struct_sockaddr_sa_len], [ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include @%:@include ]], [[struct sockaddr x; x.sa_len = 0;]])], [ac_cv_struct_sockaddr_sa_len=yes], [ac_cv_struct_sockaddr_sa_len=no]) ]) AS_VAR_IF([ac_cv_struct_sockaddr_sa_len], [yes], [ AC_DEFINE([HAVE_SOCKADDR_SA_LEN], [1], [Define if sockaddr has sa_len member]) ]) # sigh -- gethostbyname_r is a mess; it can have 3, 5 or 6 arguments :-( AH_TEMPLATE([HAVE_GETHOSTBYNAME_R], [Define this if you have some version of gethostbyname_r()]) AC_CHECK_FUNC([gethostbyname_r], [AC_DEFINE([HAVE_GETHOSTBYNAME_R]) AC_MSG_CHECKING([gethostbyname_r with 6 args]) OLD_CFLAGS=$CFLAGS CFLAGS="$CFLAGS $MY_CPPFLAGS $MY_THREAD_CPPFLAGS $MY_CFLAGS" AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ # include ]], [[ char *name; struct hostent *he, *res; char buffer[2048]; int buflen = 2048; int h_errnop; (void) gethostbyname_r(name, he, buffer, buflen, &res, &h_errnop) ]])],[ AC_DEFINE([HAVE_GETHOSTBYNAME_R]) AC_DEFINE([HAVE_GETHOSTBYNAME_R_6_ARG], [1], [Define this if you have the 6-arg version of gethostbyname_r().]) AC_MSG_RESULT([yes]) ],[ AC_MSG_RESULT([no]) AC_MSG_CHECKING([gethostbyname_r with 5 args]) AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ # include ]], [[ char *name; struct hostent *he; char buffer[2048]; int buflen = 2048; int h_errnop; (void) gethostbyname_r(name, he, buffer, buflen, &h_errnop) ]])], [ AC_DEFINE([HAVE_GETHOSTBYNAME_R]) AC_DEFINE([HAVE_GETHOSTBYNAME_R_5_ARG], [1], [Define this if you have the 5-arg version of gethostbyname_r().]) AC_MSG_RESULT([yes]) ], [ AC_MSG_RESULT([no]) AC_MSG_CHECKING([gethostbyname_r with 3 args]) AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ # include ]], [[ char *name; struct hostent *he; struct hostent_data data; (void) gethostbyname_r(name, he, &data); ]])], [ AC_DEFINE([HAVE_GETHOSTBYNAME_R]) AC_DEFINE([HAVE_GETHOSTBYNAME_R_3_ARG], [1], [Define this if you have the 3-arg version of gethostbyname_r().]) AC_MSG_RESULT([yes]) ], [ AC_MSG_RESULT([no]) ]) ]) ]) CFLAGS=$OLD_CFLAGS ], [ AC_CHECK_FUNCS([gethostbyname]) ]) AC_SUBST([HAVE_GETHOSTBYNAME_R_6_ARG]) AC_SUBST([HAVE_GETHOSTBYNAME_R_5_ARG]) AC_SUBST([HAVE_GETHOSTBYNAME_R_3_ARG]) AC_SUBST([HAVE_GETHOSTBYNAME_R]) AC_SUBST([HAVE_GETHOSTBYNAME]) # checks for system services # (none yet) # Linux requires this for correct f.p. operations AC_CHECK_FUNC([__fpu_control], [], [AC_CHECK_LIB([ieee], [__fpu_control]) ]) # check for --with-libm=... AC_SUBST([LIBM]) case $ac_sys_system in Darwin) ;; *) LIBM=-lm esac AC_MSG_CHECKING([for --with-libm=STRING]) AC_ARG_WITH([libm], [AS_HELP_STRING([--with-libm=STRING], [override libm math library to STRING (default is system-dependent)])], [ if test "$withval" = no then LIBM= AC_MSG_RESULT([force LIBM empty]) elif test "$withval" != yes then LIBM=$withval AC_MSG_RESULT([set LIBM="$withval"]) else AC_MSG_ERROR([proper usage is --with-libm=STRING]) fi], [AC_MSG_RESULT([default LIBM="$LIBM"])]) # check for --with-libc=... AC_SUBST([LIBC]) AC_MSG_CHECKING([for --with-libc=STRING]) AC_ARG_WITH([libc], [AS_HELP_STRING([--with-libc=STRING], [override libc C library to STRING (default is system-dependent)])], [ if test "$withval" = no then LIBC= AC_MSG_RESULT([force LIBC empty]) elif test "$withval" != yes then LIBC=$withval AC_MSG_RESULT([set LIBC="$withval"]) else AC_MSG_ERROR([proper usage is --with-libc=STRING]) fi], [AC_MSG_RESULT([default LIBC="$LIBC"])]) # ************************************** # * Check for gcc x64 inline assembler * # ************************************** AC_CACHE_CHECK([for x64 gcc inline assembler], [ac_cv_gcc_asm_for_x64], [ AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[ __asm__ __volatile__ ("movq %rcx, %rax"); ]])],[ac_cv_gcc_asm_for_x64=yes],[ac_cv_gcc_asm_for_x64=no]) ]) AS_VAR_IF([ac_cv_gcc_asm_for_x64], [yes], [ AC_DEFINE([HAVE_GCC_ASM_FOR_X64], [1], [Define if we can use x64 gcc inline assembler]) ]) # ************************************************** # * Check for various properties of floating point * # ************************************************** AX_C_FLOAT_WORDS_BIGENDIAN if test "$ax_cv_c_float_words_bigendian" = "yes" then AC_DEFINE([DOUBLE_IS_BIG_ENDIAN_IEEE754], [1], [Define if C doubles are 64-bit IEEE 754 binary format, stored with the most significant byte first]) elif test "$ax_cv_c_float_words_bigendian" = "no" then AC_DEFINE([DOUBLE_IS_LITTLE_ENDIAN_IEEE754], [1], [Define if C doubles are 64-bit IEEE 754 binary format, stored with the least significant byte first]) else # Some ARM platforms use a mixed-endian representation for doubles. # While Python doesn't currently have full support for these platforms # (see e.g., issue 1762561), we can at least make sure that float <-> string # conversions work. # FLOAT_WORDS_BIGENDIAN doesn't actually detect this case, but if it's not big # or little, then it must be this? AC_DEFINE([DOUBLE_IS_ARM_MIXED_ENDIAN_IEEE754], [1], [Define if C doubles are 64-bit IEEE 754 binary format, stored in ARM mixed-endian order (byte order 45670123)]) fi # The short float repr introduced in Python 3.1 requires the # correctly-rounded string <-> double conversion functions from # Python/dtoa.c, which in turn require that the FPU uses 53-bit # rounding; this is a problem on x86, where the x87 FPU has a default # rounding precision of 64 bits. For gcc/x86, we can fix this by # using inline assembler to get and set the x87 FPU control word. # This inline assembler syntax may also work for suncc and icc, # so we try it on all platforms. AC_CACHE_CHECK([whether we can use gcc inline assembler to get and set x87 control word], [ac_cv_gcc_asm_for_x87], [ AC_LINK_IFELSE( [AC_LANG_PROGRAM([[]], [[ unsigned short cw; __asm__ __volatile__ ("fnstcw %0" : "=m" (cw)); __asm__ __volatile__ ("fldcw %0" : : "m" (cw)); ]])],[ac_cv_gcc_asm_for_x87=yes],[ac_cv_gcc_asm_for_x87=no]) ]) AS_VAR_IF([ac_cv_gcc_asm_for_x87], [yes], [ AC_DEFINE([HAVE_GCC_ASM_FOR_X87], [1], [Define if we can use gcc inline assembler to get and set x87 control word]) ]) AC_CACHE_CHECK([whether we can use gcc inline assembler to get and set mc68881 fpcr], [ac_cv_gcc_asm_for_mc68881], [ AC_LINK_IFELSE( [AC_LANG_PROGRAM([[]], [[ unsigned int fpcr; __asm__ __volatile__ ("fmove.l %%fpcr,%0" : "=g" (fpcr)); __asm__ __volatile__ ("fmove.l %0,%%fpcr" : : "g" (fpcr)); ]])],[ac_cv_gcc_asm_for_mc68881=yes],[ac_cv_gcc_asm_for_mc68881=no]) ]) AS_VAR_IF([ac_cv_gcc_asm_for_mc68881], [yes], [ AC_DEFINE([HAVE_GCC_ASM_FOR_MC68881], [1], [Define if we can use gcc inline assembler to get and set mc68881 fpcr]) ]) # Detect whether system arithmetic is subject to x87-style double # rounding issues. The result of this test has little meaning on non # IEEE 754 platforms. On IEEE 754, test should return 1 if rounding # mode is round-to-nearest and double rounding issues are present, and # 0 otherwise. See https://github.com/python/cpython/issues/47186 for more info. AC_CACHE_CHECK([for x87-style double rounding], [ac_cv_x87_double_rounding], [ # $BASECFLAGS may affect the result ac_save_cc="$CC" CC="$CC $BASECFLAGS" AC_RUN_IFELSE([AC_LANG_SOURCE([[ #include #include int main(void) { volatile double x, y, z; /* 1./(1-2**-53) -> 1+2**-52 (correct), 1.0 (double rounding) */ x = 0.99999999999999989; /* 1-2**-53 */ y = 1./x; if (y != 1.) exit(0); /* 1e16+2.99999 -> 1e16+2. (correct), 1e16+4. (double rounding) */ x = 1e16; y = 2.99999; z = x + y; if (z != 1e16+4.) exit(0); /* both tests show evidence of double rounding */ exit(1); } ]])], [ac_cv_x87_double_rounding=no], [ac_cv_x87_double_rounding=yes], [ac_cv_x87_double_rounding=no]) CC="$ac_save_cc" ]) AS_VAR_IF([ac_cv_x87_double_rounding], [yes], [ AC_DEFINE([X87_DOUBLE_ROUNDING], [1], [Define if arithmetic is subject to x87-style double rounding issue]) ]) # ************************************ # * Check for mathematical functions * # ************************************ LIBS_SAVE=$LIBS LIBS="$LIBS $LIBM" AC_CHECK_FUNCS( [acosh asinh atanh erf erfc expm1 log1p log2], [], [AC_MSG_ERROR([Python requires C99 compatible libm])] ) LIBS=$LIBS_SAVE dnl For multiprocessing module, check that sem_open dnl actually works. For FreeBSD versions <= 7.2, dnl the kernel module that provides POSIX semaphores dnl isn't loaded by default, so an attempt to call dnl sem_open results in a 'Signal 12' error. AC_CACHE_CHECK([whether POSIX semaphores are enabled], [ac_cv_posix_semaphores_enabled], AC_RUN_IFELSE([ AC_LANG_SOURCE([ #include #include #include #include #include int main(void) { sem_t *a = sem_open("/autoconf", O_CREAT, S_IRUSR|S_IWUSR, 0); if (a == SEM_FAILED) { perror("sem_open"); return 1; } sem_close(a); sem_unlink("/autoconf"); return 0; } ]) ], [ac_cv_posix_semaphores_enabled=yes], [ac_cv_posix_semaphores_enabled=no], [ac_cv_posix_semaphores_enabled=yes]) ) AS_VAR_IF([ac_cv_posix_semaphores_enabled], [no], [ AC_DEFINE( [POSIX_SEMAPHORES_NOT_ENABLED], [1], [Define if POSIX semaphores aren't enabled on your system] ) ]) dnl Multiprocessing check for broken sem_getvalue AC_CACHE_CHECK([for broken sem_getvalue], [ac_cv_broken_sem_getvalue], AC_RUN_IFELSE([ AC_LANG_SOURCE([ #include #include #include #include #include int main(void){ sem_t *a = sem_open("/autocftw", O_CREAT, S_IRUSR|S_IWUSR, 0); int count; int res; if(a==SEM_FAILED){ perror("sem_open"); return 1; } res = sem_getvalue(a, &count); sem_close(a); sem_unlink("/autocftw"); return res==-1 ? 1 : 0; } ]) ], [ac_cv_broken_sem_getvalue=no], [ac_cv_broken_sem_getvalue=yes], [ac_cv_broken_sem_getvalue=yes]) ) AS_VAR_IF([ac_cv_broken_sem_getvalue], [yes], [ AC_DEFINE( [HAVE_BROKEN_SEM_GETVALUE], [1], [define to 1 if your sem_getvalue is broken.] ) ]) AC_CHECK_DECLS([RTLD_LAZY, RTLD_NOW, RTLD_GLOBAL, RTLD_LOCAL, RTLD_NODELETE, RTLD_NOLOAD, RTLD_DEEPBIND, RTLD_MEMBER], [], [], [[@%:@include ]]) # determine what size digit to use for Python's longs AC_MSG_CHECKING([digit size for Python's longs]) AC_ARG_ENABLE([big-digits], AS_HELP_STRING([--enable-big-digits@<:@=15|30@:>@],[use big digits (30 or 15 bits) for Python longs (default is 30)]]), [case $enable_big_digits in yes) enable_big_digits=30 ;; no) enable_big_digits=15 ;; [15|30]) ;; *) AC_MSG_ERROR([bad value $enable_big_digits for --enable-big-digits; value should be 15 or 30]) ;; esac AC_MSG_RESULT([$enable_big_digits]) AC_DEFINE_UNQUOTED([PYLONG_BITS_IN_DIGIT], [$enable_big_digits], [Define as the preferred size in bits of long digits]) ], [AC_MSG_RESULT([no value specified])]) # check for wchar.h AC_CHECK_HEADER([wchar.h], [ AC_DEFINE([HAVE_WCHAR_H], [1], [Define if the compiler provides a wchar.h header file.]) wchar_h="yes" ], wchar_h="no" ) # determine wchar_t size if test "$wchar_h" = yes then AC_CHECK_SIZEOF([wchar_t], [4], [m4_normalize([ #include ])]) fi # check whether wchar_t is signed or not if test "$wchar_h" = yes then # check whether wchar_t is signed or not AC_CACHE_CHECK([whether wchar_t is signed], [ac_cv_wchar_t_signed], [ AC_RUN_IFELSE([AC_LANG_SOURCE([[ #include int main() { /* Success: exit code 0 */ return ((((wchar_t) -1) < ((wchar_t) 0)) ? 0 : 1); } ]])], [ac_cv_wchar_t_signed=yes], [ac_cv_wchar_t_signed=no], [ac_cv_wchar_t_signed=yes])]) fi AC_MSG_CHECKING([whether wchar_t is usable]) # wchar_t is only usable if it maps to an unsigned type if test "$ac_cv_sizeof_wchar_t" -ge 2 \ -a "$ac_cv_wchar_t_signed" = "no" then AC_DEFINE([HAVE_USABLE_WCHAR_T], [1], [Define if you have a useable wchar_t type defined in wchar.h; useable means wchar_t must be an unsigned type with at least 16 bits. (see Include/unicodeobject.h).]) AC_MSG_RESULT([yes]) else AC_MSG_RESULT([no]) fi case $ac_sys_system/$ac_sys_release in SunOS/*) if test -f /etc/os-release; then OS_NAME=$(awk -F= '/^NAME=/ {print substr($2,2,length($2)-2)}' /etc/os-release) if test "x$OS_NAME" = "xOracle Solaris"; then # bpo-43667: In Oracle Solaris, the internal form of wchar_t in # non-Unicode locales is not Unicode and hence cannot be used directly. # https://docs.oracle.com/cd/E37838_01/html/E61053/gmwke.html AC_DEFINE([HAVE_NON_UNICODE_WCHAR_T_REPRESENTATION], [1], [Define if the internal form of wchar_t in non-Unicode locales is not Unicode.]) fi fi ;; esac # check for endianness AC_C_BIGENDIAN # ABI version string for Python extension modules. This appears between the # periods in shared library file names, e.g. foo..so. It is calculated # from the following attributes which affect the ABI of this Python build (in # this order): # # * The Python implementation (always 'cpython-' for us) # * The major and minor version numbers # * --disable-gil (adds a 't') # * --with-pydebug (adds a 'd') # # Thus for example, Python 3.2 built with wide unicode, pydebug, and pymalloc, # would get a shared library ABI version tag of 'cpython-32dmu' and shared # libraries would be named 'foo.cpython-32dmu.so'. # # In Python 3.2 and older, --with-wide-unicode added a 'u' flag. # In Python 3.7 and older, --with-pymalloc added a 'm' flag. AC_SUBST([SOABI]) AC_MSG_CHECKING([ABIFLAGS]) AC_MSG_RESULT([$ABIFLAGS]) AC_MSG_CHECKING([SOABI]) SOABI='cpython-'`echo $VERSION | tr -d .`${ABIFLAGS}${SOABI_PLATFORM:+-$SOABI_PLATFORM} AC_MSG_RESULT([$SOABI]) # Release build, debug build (Py_DEBUG), and trace refs build (Py_TRACE_REFS) # are ABI compatible if test "$Py_DEBUG" = 'true'; then # Similar to SOABI but remove "d" flag from ABIFLAGS AC_SUBST([ALT_SOABI]) ALT_SOABI='cpython-'`echo $VERSION | tr -d .``echo $ABIFLAGS | tr -d d`${SOABI_PLATFORM:+-$SOABI_PLATFORM} AC_DEFINE_UNQUOTED([ALT_SOABI], ["${ALT_SOABI}"], [Alternative SOABI used in debug build to load C extensions built in release mode]) fi AC_SUBST([EXT_SUFFIX]) EXT_SUFFIX=.${SOABI}${SHLIB_SUFFIX} AC_MSG_CHECKING([LDVERSION]) LDVERSION='$(VERSION)$(ABIFLAGS)' AC_MSG_RESULT([$LDVERSION]) # Configure the flags and dependencies used when compiling shared modules. # Do not rename LIBPYTHON - it's accessed via sysconfig by package build # systems (e.g. Meson) to decide whether to link extension modules against # libpython. AC_SUBST([MODULE_DEPS_SHARED]) AC_SUBST([LIBPYTHON]) MODULE_DEPS_SHARED='$(MODULE_DEPS_STATIC) $(EXPORTSYMS)' LIBPYTHON='' # On Android and Cygwin the shared libraries must be linked with libpython. if test "$PY_ENABLE_SHARED" = "1" && ( test -n "$ANDROID_API_LEVEL" || test "$MACHDEP" = "cygwin"); then MODULE_DEPS_SHARED="$MODULE_DEPS_SHARED \$(LDLIBRARY)" LIBPYTHON="\$(BLDLIBRARY)" fi # On iOS the shared libraries must be linked with the Python framework if test "$ac_sys_system" = "iOS"; then MODULE_DEPS_SHARED="$MODULE_DEPS_SHARED \$(PYTHONFRAMEWORKDIR)/\$(PYTHONFRAMEWORK)" fi AC_SUBST([BINLIBDEST]) BINLIBDEST='$(LIBDIR)/python$(VERSION)$(ABI_THREAD)' # Check for --with-platlibdir # /usr/$PLATLIBDIR/python$(VERSION)$(ABI_THREAD) AC_SUBST([PLATLIBDIR]) PLATLIBDIR="lib" AC_MSG_CHECKING([for --with-platlibdir]) AC_ARG_WITH( [platlibdir], [AS_HELP_STRING( [--with-platlibdir=DIRNAME], [Python library directory name (default is "lib")] )], [ # ignore 3 options: # --with-platlibdir # --with-platlibdir= # --without-platlibdir if test -n "$withval" -a "$withval" != yes -a "$withval" != no then AC_MSG_RESULT([yes]) PLATLIBDIR="$withval" BINLIBDEST='${exec_prefix}/${PLATLIBDIR}/python$(VERSION)$(ABI_THREAD)' else AC_MSG_RESULT([no]) fi], [AC_MSG_RESULT([no])]) dnl define LIBPL after ABIFLAGS and LDVERSION is defined. AC_SUBST([PY_ENABLE_SHARED]) if test x$PLATFORM_TRIPLET = x; then LIBPL='$(prefix)'"/${PLATLIBDIR}/python${VERSION}${ABI_THREAD}/config-${LDVERSION}" else LIBPL='$(prefix)'"/${PLATLIBDIR}/python${VERSION}${ABI_THREAD}/config-${LDVERSION}-${PLATFORM_TRIPLET}" fi AC_SUBST([LIBPL]) # Check for --with-wheel-pkg-dir=PATH AC_SUBST([WHEEL_PKG_DIR]) WHEEL_PKG_DIR="" AC_MSG_CHECKING([for --with-wheel-pkg-dir]) AC_ARG_WITH( [wheel-pkg-dir], [AS_HELP_STRING( [--with-wheel-pkg-dir=PATH], [Directory of wheel packages used by ensurepip (default: none)] )], [ if test -n "$withval"; then AC_MSG_RESULT([yes]) WHEEL_PKG_DIR="$withval" else AC_MSG_RESULT([no]) fi], [AC_MSG_RESULT([no])]) # Check whether right shifting a negative integer extends the sign bit # or fills with zeros (like the Cray J90, according to Tim Peters). AC_CACHE_CHECK([whether right shift extends the sign bit], [ac_cv_rshift_extends_sign], [ AC_RUN_IFELSE([AC_LANG_SOURCE([[ int main(void) { return (((-1)>>3 == -1) ? 0 : 1); } ]])], [ac_cv_rshift_extends_sign=yes], [ac_cv_rshift_extends_sign=no], [ac_cv_rshift_extends_sign=yes])]) if test "$ac_cv_rshift_extends_sign" = no then AC_DEFINE([SIGNED_RIGHT_SHIFT_ZERO_FILLS], [1], [Define if i>>j for signed int i does not extend the sign bit when i < 0]) fi # check for getc_unlocked and related locking functions AC_CACHE_CHECK([for getc_unlocked() and friends], [ac_cv_have_getc_unlocked], [ AC_LINK_IFELSE([AC_LANG_PROGRAM([[@%:@include ]], [[ FILE *f = fopen("/dev/null", "r"); flockfile(f); getc_unlocked(f); funlockfile(f); ]])],[ac_cv_have_getc_unlocked=yes],[ac_cv_have_getc_unlocked=no])]) if test "$ac_cv_have_getc_unlocked" = yes then AC_DEFINE([HAVE_GETC_UNLOCKED], [1], [Define this if you have flockfile(), getc_unlocked(), and funlockfile()]) fi dnl Check for libreadline and libedit dnl - libreadline provides "readline/readline.h" header and "libreadline" dnl shared library. pkg-config file is readline.pc dnl - libedit provides "editline/readline.h" header and "libedit" shared dnl library. pkg-config file ins libedit.pc dnl - editline is not supported ("readline.h" and "libeditline" shared library) dnl dnl NOTE: In the past we checked if readline needs an additional termcap dnl library (tinfo ncursesw ncurses termcap). We now assume that libreadline dnl or readline.pc provide correct linker information. AH_TEMPLATE([WITH_EDITLINE], [Define to build the readline module against libedit.]) AC_ARG_WITH( [readline], [AS_HELP_STRING([--with(out)-readline@<:@=editline|readline|no@:>@], [use libedit for backend or disable readline module])], [ AS_CASE([$with_readline], [editline|edit], [with_readline=edit], [yes|readline], [with_readline=readline], [no], [], [AC_MSG_ERROR([proper usage is --with(out)-readline@<:@=editline|readline|no@:>@])] ) ], [with_readline=readline] ) AS_VAR_IF([with_readline], [readline], [ PKG_CHECK_MODULES([LIBREADLINE], [readline], [ LIBREADLINE=readline READLINE_CFLAGS=$LIBREADLINE_CFLAGS READLINE_LIBS=$LIBREADLINE_LIBS ], [ WITH_SAVE_ENV([ CPPFLAGS="$CPPFLAGS $LIBREADLINE_CFLAGS" LDFLAGS="$LDFLAGS $LIBREADLINE_LIBS" AC_CHECK_HEADERS([readline/readline.h], [ AC_CHECK_LIB([readline], [readline], [ LIBREADLINE=readline READLINE_CFLAGS=${LIBREADLINE_CFLAGS-""} READLINE_LIBS=${LIBREADLINE_LIBS-"-lreadline"} ], [with_readline=no]) ], [with_readline=no]) ]) ]) ]) AS_VAR_IF([with_readline], [edit], [ PKG_CHECK_MODULES([LIBEDIT], [libedit], [ AC_DEFINE([WITH_EDITLINE], [1]) LIBREADLINE=edit READLINE_CFLAGS=$LIBEDIT_CFLAGS READLINE_LIBS=$LIBEDIT_LIBS ], [ WITH_SAVE_ENV([ CPPFLAGS="$CPPFLAGS $LIBEDIT_CFLAGS" LDFLAGS="$LDFLAGS $LIBEDIT_LIBS" AC_CHECK_HEADERS([editline/readline.h], [ AC_CHECK_LIB([edit], [readline], [ LIBREADLINE=edit AC_DEFINE([WITH_EDITLINE], [1]) READLINE_CFLAGS=${LIBEDIT_CFLAGS-""} READLINE_LIBS=${LIBEDIT_LIBS-"-ledit"} ], [with_readline=no]) ], [with_readline=no]) ]) ]) ]) dnl pyconfig.h defines _XOPEN_SOURCE=700 READLINE_CFLAGS=$(echo $READLINE_CFLAGS | sed 's/-D_XOPEN_SOURCE=600//g') AC_MSG_CHECKING([how to link readline]) AS_VAR_IF([with_readline], [no], [ AC_MSG_RESULT([no]) ], [ AC_MSG_RESULT([$with_readline (CFLAGS: $READLINE_CFLAGS, LIBS: $READLINE_LIBS)]) WITH_SAVE_ENV([ CPPFLAGS="$CPPFLAGS $READLINE_CFLAGS" LIBS="$READLINE_LIBS $LIBS" LIBS_SAVE=$LIBS m4_define([readline_includes], [ #include /* Must be first for Gnu Readline */ #ifdef WITH_EDITLINE # include #else # include # include #endif ]) # check for readline 2.2 AC_CHECK_DECL([rl_completion_append_character], [ AC_DEFINE([HAVE_RL_COMPLETION_APPEND_CHARACTER], [1], [Define if you have readline 2.2]) ], [], [readline_includes]) AC_CHECK_DECL([rl_completion_suppress_append], [ AC_DEFINE([HAVE_RL_COMPLETION_SUPPRESS_APPEND], [1], [Define if you have rl_completion_suppress_append]) ], [], [readline_includes]) # check for readline 4.0 AC_CACHE_CHECK([for rl_pre_input_hook in -l$LIBREADLINE], [ac_cv_readline_rl_pre_input_hook], [ AC_LINK_IFELSE( [AC_LANG_PROGRAM([readline_includes], [void *x = rl_pre_input_hook])], [ac_cv_readline_rl_pre_input_hook=yes], [ac_cv_readline_rl_pre_input_hook=no] ) ]) AS_VAR_IF([ac_cv_readline_rl_pre_input_hook], [yes], [ AC_DEFINE([HAVE_RL_PRE_INPUT_HOOK], [1], [Define if you have readline 4.0]) ]) # also in 4.0 AC_CACHE_CHECK([for rl_completion_display_matches_hook in -l$LIBREADLINE], [ac_cv_readline_rl_completion_display_matches_hook], [ AC_LINK_IFELSE( [AC_LANG_PROGRAM([readline_includes], [void *x = rl_completion_display_matches_hook])], [ac_cv_readline_rl_completion_display_matches_hook=yes], [ac_cv_readline_rl_completion_display_matches_hook=no] ) ]) AS_VAR_IF([ac_cv_readline_rl_completion_display_matches_hook], [yes], [ AC_DEFINE([HAVE_RL_COMPLETION_DISPLAY_MATCHES_HOOK], [1], [Define if you have readline 4.0]) ]) # also in 4.0, but not in editline AC_CACHE_CHECK([for rl_resize_terminal in -l$LIBREADLINE], [ac_cv_readline_rl_resize_terminal], [ AC_LINK_IFELSE( [AC_LANG_PROGRAM([readline_includes], [void *x = rl_resize_terminal])], [ac_cv_readline_rl_resize_terminal=yes], [ac_cv_readline_rl_resize_terminal=no] ) ]) AS_VAR_IF([ac_cv_readline_rl_resize_terminal], [yes], [ AC_DEFINE([HAVE_RL_RESIZE_TERMINAL], [1], [Define if you have readline 4.0]) ]) # check for readline 4.2 AC_CACHE_CHECK([for rl_completion_matches in -l$LIBREADLINE], [ac_cv_readline_rl_completion_matches], [ AC_LINK_IFELSE( [AC_LANG_PROGRAM([readline_includes], [void *x = rl_completion_matches])], [ac_cv_readline_rl_completion_matches=yes], [ac_cv_readline_rl_completion_matches=no] ) ]) AS_VAR_IF([ac_cv_readline_rl_completion_matches], [yes], [ AC_DEFINE([HAVE_RL_COMPLETION_MATCHES], [1], [Define if you have readline 4.2]) ]) # also in readline 4.2 AC_CHECK_DECL([rl_catch_signals], [ AC_DEFINE([HAVE_RL_CATCH_SIGNAL], [1], [Define if you can turn off readline's signal handling.]) ], [], [readline_includes]) AC_CACHE_CHECK([for append_history in -l$LIBREADLINE], [ac_cv_readline_append_history], [ AC_LINK_IFELSE( [AC_LANG_PROGRAM([readline_includes], [void *x = append_history])], [ac_cv_readline_append_history=yes], [ac_cv_readline_append_history=no] ) ]) AS_VAR_IF([ac_cv_readline_append_history], [yes], [ AC_DEFINE([HAVE_RL_APPEND_HISTORY], [1], [Define if readline supports append_history]) ]) # in readline as well as newer editline (April 2023) AC_CHECK_TYPES([rl_compdisp_func_t], [], [], [readline_includes]) # Some editline versions declare rl_startup_hook as taking no args, others # declare it as taking 2. AC_CACHE_CHECK([if rl_startup_hook takes arguments], [ac_cv_readline_rl_startup_hook_takes_args], [ AC_COMPILE_IFELSE( [AC_LANG_PROGRAM([readline_includes] [extern int test_hook_func(const char *text, int state);], [rl_startup_hook=test_hook_func;])], [ac_cv_readline_rl_startup_hook_takes_args=yes], [ac_cv_readline_rl_startup_hook_takes_args=no] ) ]) AS_VAR_IF([ac_cv_readline_rl_startup_hook_takes_args], [yes], [ AC_DEFINE([Py_RL_STARTUP_HOOK_TAKES_ARGS], [1], [Define if rl_startup_hook takes arguments]) ]) m4_undefine([readline_includes]) ])dnl WITH_SAVE_ENV() ]) AC_CACHE_CHECK([for broken nice()], [ac_cv_broken_nice], [ AC_RUN_IFELSE([AC_LANG_SOURCE([[ #include #include int main(void) { int val1 = nice(1); if (val1 != -1 && val1 == nice(2)) exit(0); exit(1); } ]])], [ac_cv_broken_nice=yes], [ac_cv_broken_nice=no], [ac_cv_broken_nice=no])]) if test "$ac_cv_broken_nice" = yes then AC_DEFINE([HAVE_BROKEN_NICE], [1], [Define if nice() returns success/failure instead of the new priority.]) fi AC_CACHE_CHECK([for broken poll()], [ac_cv_broken_poll], AC_RUN_IFELSE([AC_LANG_SOURCE([[ #include #include int main(void) { struct pollfd poll_struct = { 42, POLLIN|POLLPRI|POLLOUT, 0 }; int poll_test; close (42); poll_test = poll(&poll_struct, 1, 0); if (poll_test < 0) return 0; else if (poll_test == 0 && poll_struct.revents != POLLNVAL) return 0; else return 1; } ]])], [ac_cv_broken_poll=yes], [ac_cv_broken_poll=no], [ac_cv_broken_poll=no])) if test "$ac_cv_broken_poll" = yes then AC_DEFINE([HAVE_BROKEN_POLL], [1], [Define if poll() sets errno on invalid file descriptors.]) fi # check tzset(3) exists and works like we expect it to AC_CACHE_CHECK([for working tzset()], [ac_cv_working_tzset], [ AC_RUN_IFELSE([AC_LANG_SOURCE([[ #include #include #include #if HAVE_TZNAME extern char *tzname[]; #endif int main(void) { /* Note that we need to ensure that not only does tzset(3) do 'something' with localtime, but it works as documented in the library reference and as expected by the test suite. This includes making sure that tzname is set properly if tm->tm_zone does not exist since it is the alternative way of getting timezone info. Red Hat 6.2 doesn't understand the southern hemisphere after New Year's Day. */ time_t groundhogday = 1044144000; /* GMT-based */ time_t midyear = groundhogday + (365 * 24 * 3600 / 2); putenv("TZ=UTC+0"); tzset(); if (localtime(&groundhogday)->tm_hour != 0) exit(1); #if HAVE_TZNAME /* For UTC, tzname[1] is sometimes "", sometimes " " */ if (strcmp(tzname[0], "UTC") || (tzname[1][0] != 0 && tzname[1][0] != ' ')) exit(1); #endif putenv("TZ=EST+5EDT,M4.1.0,M10.5.0"); tzset(); if (localtime(&groundhogday)->tm_hour != 19) exit(1); #if HAVE_TZNAME if (strcmp(tzname[0], "EST") || strcmp(tzname[1], "EDT")) exit(1); #endif putenv("TZ=AEST-10AEDT-11,M10.5.0,M3.5.0"); tzset(); if (localtime(&groundhogday)->tm_hour != 11) exit(1); #if HAVE_TZNAME if (strcmp(tzname[0], "AEST") || strcmp(tzname[1], "AEDT")) exit(1); #endif #if HAVE_STRUCT_TM_TM_ZONE if (strcmp(localtime(&groundhogday)->tm_zone, "AEDT")) exit(1); if (strcmp(localtime(&midyear)->tm_zone, "AEST")) exit(1); #endif exit(0); } ]])], [ac_cv_working_tzset=yes], [ac_cv_working_tzset=no], [ac_cv_working_tzset=no])]) if test "$ac_cv_working_tzset" = yes then AC_DEFINE([HAVE_WORKING_TZSET], [1], [Define if tzset() actually switches the local timezone in a meaningful way.]) fi # Look for subsecond timestamps in struct stat AC_CACHE_CHECK([for tv_nsec in struct stat], [ac_cv_stat_tv_nsec], AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[@%:@include ]], [[ struct stat st; st.st_mtim.tv_nsec = 1; ]])], [ac_cv_stat_tv_nsec=yes], [ac_cv_stat_tv_nsec=no])) if test "$ac_cv_stat_tv_nsec" = yes then AC_DEFINE([HAVE_STAT_TV_NSEC], [1], [Define if you have struct stat.st_mtim.tv_nsec]) fi # Look for BSD style subsecond timestamps in struct stat AC_CACHE_CHECK([for tv_nsec2 in struct stat], [ac_cv_stat_tv_nsec2], AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[@%:@include ]], [[ struct stat st; st.st_mtimespec.tv_nsec = 1; ]])], [ac_cv_stat_tv_nsec2=yes], [ac_cv_stat_tv_nsec2=no])) if test "$ac_cv_stat_tv_nsec2" = yes then AC_DEFINE([HAVE_STAT_TV_NSEC2], [1], [Define if you have struct stat.st_mtimensec]) fi AC_CACHE_CHECK([whether year with century should be normalized for strftime], [ac_cv_normalize_century], [ AC_RUN_IFELSE([AC_LANG_SOURCE([[ #include #include int main(void) { char year[5]; struct tm date = { .tm_year = -1801, .tm_mon = 0, .tm_mday = 1 }; if (strftime(year, sizeof(year), "%Y", &date) && !strcmp(year, "0099")) { return 1; } return 0; } ]])], [ac_cv_normalize_century=yes], [ac_cv_normalize_century=no], [ac_cv_normalize_century=yes])]) if test "$ac_cv_normalize_century" = yes then AC_DEFINE([Py_NORMALIZE_CENTURY], [1], [Define if year with century should be normalized for strftime.]) fi AC_CACHE_CHECK([whether C99-specific strftime specifiers are supported], [ac_cv_strftime_c99_support], [ AC_RUN_IFELSE([AC_LANG_SOURCE([[ #include #include int main(void) { char full_date[11]; struct tm date = { .tm_year = 0, .tm_mon = 0, .tm_mday = 1 }; if (strftime(full_date, sizeof(full_date), "%F", &date) && !strcmp(full_date, "1900-01-01")) { return 0; } return 1; } ]])], [ac_cv_strftime_c99_support=yes], [ac_cv_strftime_c99_support=no], [ac_cv_strftime_c99_support=no])]) if test "$ac_cv_strftime_c99_support" = yes then AC_DEFINE([Py_STRFTIME_C99_SUPPORT], [1], [Define if C99-specific strftime specifiers are supported.]) fi dnl check for ncursesw/ncurses and panelw/panel dnl NOTE: old curses is not detected. dnl have_curses=[no, yes] dnl have_panel=[no, yes] have_curses=no have_panel=no dnl PY_CHECK_CURSES(LIBCURSES, LIBPANEL) dnl Sets 'have_curses' and 'have_panel'. dnl For the PKG_CHECK_MODULES() calls, we can safely reuse the first variable dnl here, since we're only calling the macro a second time if the first call dnl fails. AC_DEFUN([PY_CHECK_CURSES], [dnl AS_VAR_PUSHDEF([curses_var], [m4_toupper([$1])]) AS_VAR_PUSHDEF([panel_var], [m4_toupper([$2])]) PKG_CHECK_MODULES([CURSES], [$1], [AC_DEFINE([HAVE_]curses_var, [1], [Define if you have the '$1' library]) AS_VAR_SET([have_curses], [yes]) PKG_CHECK_MODULES([PANEL], [$2], [AC_DEFINE([HAVE_]panel_var, [1], [Define if you have the '$2' library]) AS_VAR_SET([have_panel], [yes])], [AS_VAR_SET([have_panel], [no])])], [AS_VAR_SET([have_curses], [no])]) AS_VAR_POPDEF([curses_var]) AS_VAR_POPDEF([panel_var])]) # Check for ncursesw/panelw first. If that fails, try ncurses/panel. PY_CHECK_CURSES([ncursesw], [panelw]) AS_VAR_IF([have_curses], [no], [PY_CHECK_CURSES([ncurses], [panel])]) WITH_SAVE_ENV([ # Make sure we've got the header defines. AS_VAR_APPEND([CPPFLAGS], [" $CURSES_CFLAGS $PANEL_CFLAGS"]) AC_CHECK_HEADERS(m4_normalize([ ncursesw/curses.h ncursesw/ncurses.h ncursesw/panel.h ncurses/curses.h ncurses/ncurses.h ncurses/panel.h curses.h ncurses.h panel.h ])) # Check that we're able to link with crucial curses/panel functions. This # also serves as a fallback in case pkg-config failed. AS_VAR_APPEND([LIBS], [" $CURSES_LIBS $PANEL_LIBS"]) AC_SEARCH_LIBS([initscr], [ncursesw ncurses], [AS_VAR_IF([have_curses], [no], [AS_VAR_SET([have_curses], [yes]) CURSES_LIBS=${CURSES_LIBS-"$ac_cv_search_initscr"}])], [AS_VAR_SET([have_curses], [no])]) AC_SEARCH_LIBS([update_panels], [panelw panel], [AS_VAR_IF([have_panel], [no], [AS_VAR_SET([have_panel], [yes]) PANEL_LIBS=${PANEL_LIBS-"$ac_cv_search_update_panels"}])], [AS_VAR_SET([have_panel], [no])]) dnl Issue #25720: ncurses has introduced the NCURSES_OPAQUE symbol making opaque dnl structs since version 5.7. If the macro is defined as zero before including dnl [n]curses.h, ncurses will expose fields of the structs regardless of the dnl configuration. AC_DEFUN([_CURSES_INCLUDES],dnl [ #define NCURSES_OPAQUE 0 #if defined(HAVE_NCURSESW_NCURSES_H) # include #elif defined(HAVE_NCURSESW_CURSES_H) # include #elif defined(HAVE_NCURSES_NCURSES_H) # include #elif defined(HAVE_NCURSES_CURSES_H) # include #elif defined(HAVE_NCURSES_H) # include #elif defined(HAVE_CURSES_H) # include #endif ]) AS_IF([test "have_curses" != "no"], [ dnl remove _XOPEN_SOURCE macro from curses cflags. pyconfig.h sets dnl the macro to 700. CURSES_CFLAGS=$(echo $CURSES_CFLAGS | sed 's/-D_XOPEN_SOURCE=600//g') AS_VAR_IF([ac_sys_system], [Darwin], [ dnl On macOS, there is no separate /usr/lib/libncursesw nor libpanelw. dnl System-supplied ncurses combines libncurses/libpanel and supports wide dnl characters, so we can use it like ncursesw. dnl If a locally-supplied version of libncursesw is found, we will use that. dnl There should also be a libpanelw. dnl _XOPEN_SOURCE defines are usually excluded for macOS, but we need dnl _XOPEN_SOURCE_EXTENDED here for ncurses wide char support. AS_VAR_APPEND([CURSES_CFLAGS], [" -D_XOPEN_SOURCE_EXTENDED=1"]) ]) dnl pyconfig.h defines _XOPEN_SOURCE=700 PANEL_CFLAGS=$(echo $PANEL_CFLAGS | sed 's/-D_XOPEN_SOURCE=600//g') # On Solaris, term.h requires curses.h AC_CHECK_HEADERS([term.h], [], [], _CURSES_INCLUDES) # On HP/UX 11.0, mvwdelch is a block with a return statement AC_CACHE_CHECK([whether mvwdelch is an expression], [ac_cv_mvwdelch_is_expression], AC_COMPILE_IFELSE([AC_LANG_PROGRAM(_CURSES_INCLUDES, [[ int rtn; rtn = mvwdelch(0,0,0); ]])], [ac_cv_mvwdelch_is_expression=yes], [ac_cv_mvwdelch_is_expression=no])) if test "$ac_cv_mvwdelch_is_expression" = yes then AC_DEFINE([MVWDELCH_IS_EXPRESSION], [1], [Define if mvwdelch in curses.h is an expression.]) fi AC_CACHE_CHECK([whether WINDOW has _flags], [ac_cv_window_has_flags], AC_COMPILE_IFELSE([AC_LANG_PROGRAM(_CURSES_INCLUDES, [[ WINDOW *w; w->_flags = 0; ]])], [ac_cv_window_has_flags=yes], [ac_cv_window_has_flags=no])) if test "$ac_cv_window_has_flags" = yes then AC_DEFINE([WINDOW_HAS_FLAGS], [1], [Define if WINDOW in curses.h offers a field _flags.]) fi dnl PY_CHECK_CURSES_FUNC(FUNCTION) AC_DEFUN([PY_CHECK_CURSES_FUNC], [ AS_VAR_PUSHDEF([py_var], [ac_cv_lib_curses_$1]) AS_VAR_PUSHDEF([py_define], [HAVE_CURSES_]m4_toupper($1)) AC_CACHE_CHECK( [for curses function $1], [py_var], [AC_COMPILE_IFELSE( [AC_LANG_PROGRAM(_CURSES_INCLUDES, [ #ifndef $1 void *x=$1 #endif ])], [AS_VAR_SET([py_var], [yes])], [AS_VAR_SET([py_var], [no])])] ) AS_VAR_IF( [py_var], [yes], [AC_DEFINE([py_define], [1], [Define if you have the '$1' function.])]) AS_VAR_POPDEF([py_var]) AS_VAR_POPDEF([py_define]) ]) PY_CHECK_CURSES_FUNC([is_pad]) PY_CHECK_CURSES_FUNC([is_term_resized]) PY_CHECK_CURSES_FUNC([resize_term]) PY_CHECK_CURSES_FUNC([resizeterm]) PY_CHECK_CURSES_FUNC([immedok]) PY_CHECK_CURSES_FUNC([syncok]) PY_CHECK_CURSES_FUNC([wchgat]) PY_CHECK_CURSES_FUNC([filter]) PY_CHECK_CURSES_FUNC([has_key]) PY_CHECK_CURSES_FUNC([typeahead]) PY_CHECK_CURSES_FUNC([use_env]) CPPFLAGS=$ac_save_cppflags ])dnl have_curses != no ])dnl save env AC_MSG_NOTICE([checking for device files]) dnl NOTE: Inform user how to proceed with files when cross compiling. dnl Some cross-compile builds are predictable; they won't ever dnl have /dev/ptmx or /dev/ptc, so we can set them explicitly. if test "$ac_sys_system" = "Linux-android" || test "$ac_sys_system" = "iOS"; then ac_cv_file__dev_ptmx=no ac_cv_file__dev_ptc=no else if test "x$cross_compiling" = xyes; then if test "${ac_cv_file__dev_ptmx+set}" != set; then AC_MSG_CHECKING([for /dev/ptmx]) AC_MSG_RESULT([not set]) AC_MSG_ERROR([set ac_cv_file__dev_ptmx to yes/no in your CONFIG_SITE file when cross compiling]) fi if test "${ac_cv_file__dev_ptc+set}" != set; then AC_MSG_CHECKING([for /dev/ptc]) AC_MSG_RESULT([not set]) AC_MSG_ERROR([set ac_cv_file__dev_ptc to yes/no in your CONFIG_SITE file when cross compiling]) fi fi AC_CHECK_FILE([/dev/ptmx], [], []) if test "x$ac_cv_file__dev_ptmx" = xyes; then AC_DEFINE([HAVE_DEV_PTMX], [1], [Define to 1 if you have the /dev/ptmx device file.]) fi AC_CHECK_FILE([/dev/ptc], [], []) if test "x$ac_cv_file__dev_ptc" = xyes; then AC_DEFINE([HAVE_DEV_PTC], [1], [Define to 1 if you have the /dev/ptc device file.]) fi fi if test $ac_sys_system = Darwin then LIBS="$LIBS -framework CoreFoundation" fi AC_CHECK_TYPES([socklen_t], [], [AC_DEFINE([socklen_t], [int], [Define to 'int' if does not define.])], [ #ifdef HAVE_SYS_TYPES_H #include #endif #ifdef HAVE_SYS_SOCKET_H #include #endif ]) AC_CACHE_CHECK([for broken mbstowcs], [ac_cv_broken_mbstowcs], AC_RUN_IFELSE([AC_LANG_SOURCE([[ #include #include #include int main(void) { size_t len = -1; const char *str = "text"; len = mbstowcs(NULL, str, 0); return (len != 4); } ]])], [ac_cv_broken_mbstowcs=no], [ac_cv_broken_mbstowcs=yes], [ac_cv_broken_mbstowcs=no])) if test "$ac_cv_broken_mbstowcs" = yes then AC_DEFINE([HAVE_BROKEN_MBSTOWCS], [1], [Define if mbstowcs(NULL, "text", 0) does not return the number of wide chars that would be converted.]) fi # Check for --with-computed-gotos AC_MSG_CHECKING([for --with-computed-gotos]) AC_ARG_WITH( [computed-gotos], [AS_HELP_STRING( [--with-computed-gotos], [enable computed gotos in evaluation loop (enabled by default on supported compilers)] )], [ if test "$withval" = yes then AC_DEFINE([USE_COMPUTED_GOTOS], [1], [Define if you want to use computed gotos in ceval.c.]) AC_MSG_RESULT([yes]) fi if test "$withval" = no then AC_DEFINE([USE_COMPUTED_GOTOS], [0], [Define if you want to use computed gotos in ceval.c.]) AC_MSG_RESULT([no]) fi ], [AC_MSG_RESULT([no value specified])]) AC_CACHE_CHECK([whether $CC supports computed gotos], [ac_cv_computed_gotos], AC_RUN_IFELSE([AC_LANG_SOURCE([[[ int main(int argc, char **argv) { static void *targets[1] = { &&LABEL1 }; goto LABEL2; LABEL1: return 0; LABEL2: goto *targets[0]; return 1; } ]]])], [ac_cv_computed_gotos=yes], [ac_cv_computed_gotos=no], [if test "${with_computed_gotos+set}" = set; then ac_cv_computed_gotos="$with_computed_gotos -- configured --with(out)-computed-gotos" else ac_cv_computed_gotos=no fi])) case "$ac_cv_computed_gotos" in yes*) AC_DEFINE([HAVE_COMPUTED_GOTOS], [1], [Define if the C compiler supports computed gotos.]) esac case $ac_sys_system in AIX*) AC_DEFINE([HAVE_BROKEN_PIPE_BUF], [1], [Define if the system reports an invalid PIPE_BUF value.]) ;; esac AC_SUBST([THREADHEADERS]) for h in `(cd $srcdir;echo Python/thread_*.h)` do THREADHEADERS="$THREADHEADERS \$(srcdir)/$h" done AC_SUBST([SRCDIRS]) SRCDIRS="\ Modules \ Modules/_blake2 \ Modules/_ctypes \ Modules/_decimal \ Modules/_decimal/libmpdec \ Modules/_hacl \ Modules/_io \ Modules/_multiprocessing \ Modules/_sqlite \ Modules/_sre \ Modules/_testcapi \ Modules/_testinternalcapi \ Modules/_testlimitedcapi \ Modules/_xxtestfuzz \ Modules/cjkcodecs \ Modules/expat \ Objects \ Objects/mimalloc \ Objects/mimalloc/prim \ Parser \ Parser/tokenizer \ Parser/lexer \ Programs \ Python \ Python/frozen_modules" AC_MSG_CHECKING([for build directories]) for dir in $SRCDIRS; do if test ! -d $dir; then mkdir $dir fi done AC_MSG_RESULT([done]) # Availability of -O2: AC_CACHE_CHECK([for -O2], [ac_cv_compile_o2], [ saved_cflags="$CFLAGS" CFLAGS="-O2" AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])], [ac_cv_compile_o2=yes], [ac_cv_compile_o2=no]) CFLAGS="$saved_cflags" ]) # _FORTIFY_SOURCE wrappers for memmove and bcopy are incorrect: # http://sourceware.org/ml/libc-alpha/2010-12/msg00009.html AC_MSG_CHECKING([for glibc _FORTIFY_SOURCE/memmove bug]) saved_cflags="$CFLAGS" CFLAGS="-O2 -D_FORTIFY_SOURCE=2" if test "$ac_cv_compile_o2" = no; then CFLAGS="" fi AC_RUN_IFELSE([AC_LANG_SOURCE([[ #include #include #include void foo(void *p, void *q) { memmove(p, q, 19); } int main(void) { char a[32] = "123456789000000000"; foo(&a[9], a); if (strcmp(a, "123456789123456789000000000") != 0) return 1; foo(a, &a[9]); if (strcmp(a, "123456789000000000") != 0) return 1; return 0; } ]])], [have_glibc_memmove_bug=no], [have_glibc_memmove_bug=yes], [have_glibc_memmove_bug=undefined]) CFLAGS="$saved_cflags" AC_MSG_RESULT([$have_glibc_memmove_bug]) if test "$have_glibc_memmove_bug" = yes; then AC_DEFINE([HAVE_GLIBC_MEMMOVE_BUG], [1], [Define if glibc has incorrect _FORTIFY_SOURCE wrappers for memmove and bcopy.]) fi if test "$ac_cv_gcc_asm_for_x87" = yes; then # Some versions of gcc miscompile inline asm: # http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46491 # http://gcc.gnu.org/ml/gcc/2010-11/msg00366.html case $CC in *gcc*) AC_MSG_CHECKING([for gcc ipa-pure-const bug]) saved_cflags="$CFLAGS" CFLAGS="-O2" AC_RUN_IFELSE([AC_LANG_SOURCE([[ __attribute__((noinline)) int foo(int *p) { int r; asm ( "movl \$6, (%1)\n\t" "xorl %0, %0\n\t" : "=r" (r) : "r" (p) : "memory" ); return r; } int main(void) { int p = 8; if ((foo(&p) ? : p) != 6) return 1; return 0; } ]])], [have_ipa_pure_const_bug=no], [have_ipa_pure_const_bug=yes], [have_ipa_pure_const_bug=undefined]) CFLAGS="$saved_cflags" AC_MSG_RESULT([$have_ipa_pure_const_bug]) if test "$have_ipa_pure_const_bug" = yes; then AC_DEFINE([HAVE_IPA_PURE_CONST_BUG], [1], [Define if gcc has the ipa-pure-const bug.]) fi ;; esac fi # ensurepip option AC_MSG_CHECKING([for ensurepip]) AC_ARG_WITH([ensurepip], [AS_HELP_STRING([--with-ensurepip@<:@=install|upgrade|no@:>@], ["install" or "upgrade" using bundled pip (default is upgrade)])], [], [ AS_CASE([$ac_sys_system], [Emscripten], [with_ensurepip=no], [WASI], [with_ensurepip=no], [iOS], [with_ensurepip=no], [with_ensurepip=upgrade] ) ]) AS_CASE([$with_ensurepip], [yes|upgrade],[ENSUREPIP=upgrade], [install],[ENSUREPIP=install], [no],[ENSUREPIP=no], [AC_MSG_ERROR([--with-ensurepip=upgrade|install|no])]) AC_MSG_RESULT([$ENSUREPIP]) AC_SUBST([ENSUREPIP]) # check if the dirent structure of a d_type field and DT_UNKNOWN is defined AC_CACHE_CHECK([if the dirent structure of a d_type field], [ac_cv_dirent_d_type], [ AC_LINK_IFELSE( [ AC_LANG_SOURCE([[ #include int main(void) { struct dirent entry; return entry.d_type == DT_UNKNOWN; } ]]) ],[ac_cv_dirent_d_type=yes],[ac_cv_dirent_d_type=no]) ]) AS_VAR_IF([ac_cv_dirent_d_type], [yes], [ AC_DEFINE([HAVE_DIRENT_D_TYPE], [1], [Define to 1 if the dirent structure has a d_type field]) ]) # check if the Linux getrandom() syscall is available AC_CACHE_CHECK([for the Linux getrandom() syscall], [ac_cv_getrandom_syscall], [ AC_LINK_IFELSE( [ AC_LANG_SOURCE([[ #include #include #include #include int main(void) { char buffer[1]; const size_t buflen = sizeof(buffer); const int flags = GRND_NONBLOCK; /* ignore the result, Python checks for ENOSYS and EAGAIN at runtime */ (void)syscall(SYS_getrandom, buffer, buflen, flags); return 0; } ]]) ],[ac_cv_getrandom_syscall=yes],[ac_cv_getrandom_syscall=no]) ]) AS_VAR_IF([ac_cv_getrandom_syscall], [yes], [ AC_DEFINE([HAVE_GETRANDOM_SYSCALL], [1], [Define to 1 if the Linux getrandom() syscall is available]) ]) # check if the getrandom() function is available # the test was written for the Solaris function of AC_CACHE_CHECK([for the getrandom() function], [ac_cv_func_getrandom], [ AC_LINK_IFELSE( [ AC_LANG_SOURCE([[ #include #include int main(void) { char buffer[1]; const size_t buflen = sizeof(buffer); const int flags = 0; /* ignore the result, Python checks for ENOSYS at runtime */ (void)getrandom(buffer, buflen, flags); return 0; } ]]) ],[ac_cv_func_getrandom=yes],[ac_cv_func_getrandom=no]) ]) AS_VAR_IF([ac_cv_func_getrandom], [yes], [ AC_DEFINE([HAVE_GETRANDOM], [1], [Define to 1 if the getrandom() function is available]) ]) # checks for POSIX shared memory, used by Modules/_multiprocessing/posixshmem.c # shm_* may only be available if linking against librt POSIXSHMEM_CFLAGS='-I$(srcdir)/Modules/_multiprocessing' WITH_SAVE_ENV([ AC_SEARCH_LIBS([shm_open], [rt]) AS_VAR_IF([ac_cv_search_shm_open], [-lrt], [POSIXSHMEM_LIBS="-lrt"]) dnl Temporarily override ac_includes_default for AC_CHECK_FUNCS below. _SAVE_VAR([ac_includes_default]) ac_includes_default="\ ${ac_includes_default} #ifndef __cplusplus # ifdef HAVE_SYS_MMAN_H # include # endif #endif " AC_CHECK_FUNCS([shm_open shm_unlink], [have_posix_shmem=yes], [have_posix_shmem=no]) _RESTORE_VAR([ac_includes_default]) ]) # Check for usable OpenSSL AX_CHECK_OPENSSL([have_openssl=yes],[have_openssl=no]) # rpath to libssl and libcrypto AS_VAR_IF([GNULD], [yes], [ rpath_arg="-Wl,--enable-new-dtags,-rpath=" ], [ if test "$ac_sys_system" = "Darwin" then rpath_arg="-Wl,-rpath," else rpath_arg="-Wl,-rpath=" fi ]) AC_MSG_CHECKING([for --with-openssl-rpath]) AC_ARG_WITH([openssl-rpath], AS_HELP_STRING([--with-openssl-rpath=@<:@DIR|auto|no@:>@], [Set runtime library directory (rpath) for OpenSSL libraries, no (default): don't set rpath, auto: auto-detect rpath from --with-openssl and pkg-config, DIR: set an explicit rpath ]), [], [with_openssl_rpath=no] ) AS_CASE([$with_openssl_rpath], [auto|yes], [ OPENSSL_RPATH=auto dnl look for linker directories for arg in "$OPENSSL_LDFLAGS"; do AS_CASE([$arg], [-L*], [OPENSSL_LDFLAGS_RPATH="$OPENSSL_LDFLAGS_RPATH ${rpath_arg}$(echo $arg | cut -c3-)"] ) done ], [no], [OPENSSL_RPATH=], [AS_IF( [test -d "$with_openssl_rpath"], [ OPENSSL_RPATH="$with_openssl_rpath" OPENSSL_LDFLAGS_RPATH="${rpath_arg}$with_openssl_rpath" ], AC_MSG_ERROR([--with-openssl-rpath "$with_openssl_rpath" is not a directory])) ] ) AC_MSG_RESULT([$OPENSSL_RPATH]) # This static linking is NOT OFFICIALLY SUPPORTED and not advertised. # Requires static OpenSSL build with position-independent code. Some features # like DSO engines or external OSSL providers don't work. Only tested with GCC # and clang on X86_64. AS_VAR_IF([PY_UNSUPPORTED_OPENSSL_BUILD], [static], [ AC_MSG_CHECKING([for unsupported static openssl build]) new_OPENSSL_LIBS= for arg in $OPENSSL_LIBS; do AS_CASE([$arg], [-l*], [ libname=$(echo $arg | cut -c3-) new_OPENSSL_LIBS="$new_OPENSSL_LIBS -l:lib${libname}.a -Wl,--exclude-libs,lib${libname}.a" ], [new_OPENSSL_LIBS="$new_OPENSSL_LIBS $arg"] ) done dnl include libz for OpenSSL build flavors with compression support OPENSSL_LIBS="$new_OPENSSL_LIBS $ZLIB_LIBS" AC_MSG_RESULT([$OPENSSL_LIBS]) ]) dnl AX_CHECK_OPENSSL does not export libcrypto-only libs LIBCRYPTO_LIBS= for arg in $OPENSSL_LIBS; do AS_CASE([$arg], [-l*ssl*|-Wl*ssl*], [], [LIBCRYPTO_LIBS="$LIBCRYPTO_LIBS $arg"] ) done # check if OpenSSL libraries work as expected WITH_SAVE_ENV([ LIBS="$LIBS $OPENSSL_LIBS" CFLAGS="$CFLAGS $OPENSSL_INCLUDES" LDFLAGS="$LDFLAGS $OPENSSL_LDFLAGS $OPENSSL_LDFLAGS_RPATH" AC_CACHE_CHECK([whether OpenSSL provides required ssl module APIs], [ac_cv_working_openssl_ssl], [ AC_LINK_IFELSE([AC_LANG_PROGRAM([ #include #include #if OPENSSL_VERSION_NUMBER < 0x10101000L #error "OpenSSL >= 1.1.1 is required" #endif static void keylog_cb(const SSL *ssl, const char *line) {} ], [ SSL_CTX *ctx = SSL_CTX_new(TLS_client_method()); SSL_CTX_set_keylog_callback(ctx, keylog_cb); SSL *ssl = SSL_new(ctx); X509_VERIFY_PARAM *param = SSL_get0_param(ssl); X509_VERIFY_PARAM_set1_host(param, "python.org", 0); SSL_free(ssl); SSL_CTX_free(ctx); ])], [ac_cv_working_openssl_ssl=yes], [ac_cv_working_openssl_ssl=no]) ]) ]) WITH_SAVE_ENV([ LIBS="$LIBS $LIBCRYPTO_LIBS" CFLAGS="$CFLAGS $OPENSSL_INCLUDES" LDFLAGS="$LDFLAGS $OPENSSL_LDFLAGS $OPENSSL_LDFLAGS_RPATH" AC_CACHE_CHECK([whether OpenSSL provides required hashlib module APIs], [ac_cv_working_openssl_hashlib], [ AC_LINK_IFELSE([AC_LANG_PROGRAM([ #include #include #if OPENSSL_VERSION_NUMBER < 0x10101000L #error "OpenSSL >= 1.1.1 is required" #endif ], [ OBJ_nid2sn(NID_md5); OBJ_nid2sn(NID_sha1); OBJ_nid2sn(NID_sha3_512); OBJ_nid2sn(NID_blake2b512); EVP_PBE_scrypt(NULL, 0, NULL, 0, 2, 8, 1, 0, NULL, 0); ])], [ac_cv_working_openssl_hashlib=yes], [ac_cv_working_openssl_hashlib=no]) ]) ]) # ssl module default cipher suite string AH_TEMPLATE([PY_SSL_DEFAULT_CIPHERS], [Default cipher suites list for ssl module. 1: Python's preferred selection, 2: leave OpenSSL defaults untouched, 0: custom string]) AH_TEMPLATE([PY_SSL_DEFAULT_CIPHER_STRING], [Cipher suite string for PY_SSL_DEFAULT_CIPHERS=0] ) AC_MSG_CHECKING([for --with-ssl-default-suites]) AC_ARG_WITH( [ssl-default-suites], [AS_HELP_STRING( [--with-ssl-default-suites=@<:@python|openssl|STRING@:>@], [override default cipher suites string, python: use Python's preferred selection (default), openssl: leave OpenSSL's defaults untouched, STRING: use a custom string, python and STRING also set TLS 1.2 as minimum TLS version] )], [ AC_MSG_RESULT([$withval]) case "$withval" in python) AC_DEFINE([PY_SSL_DEFAULT_CIPHERS], [1]) ;; openssl) AC_DEFINE([PY_SSL_DEFAULT_CIPHERS], [2]) ;; *) AC_DEFINE([PY_SSL_DEFAULT_CIPHERS], [0]) AC_DEFINE_UNQUOTED([PY_SSL_DEFAULT_CIPHER_STRING], ["$withval"]) ;; esac ], [ AC_MSG_RESULT([python]) AC_DEFINE([PY_SSL_DEFAULT_CIPHERS], [1]) ]) # builtin hash modules default_hashlib_hashes="md5,sha1,sha2,sha3,blake2" AC_MSG_CHECKING([for --with-builtin-hashlib-hashes]) AC_ARG_WITH( [builtin-hashlib-hashes], [AS_HELP_STRING( [--with-builtin-hashlib-hashes=md5,sha1,sha2,sha3,blake2], [builtin hash modules, md5, sha1, sha2, sha3 (with shake), blake2] )], [ AS_CASE([$with_builtin_hashlib_hashes], [yes], [with_builtin_hashlib_hashes=$default_hashlib_hashes], [no], [with_builtin_hashlib_hashes=""] ) ], [with_builtin_hashlib_hashes=$default_hashlib_hashes]) AC_MSG_RESULT([$with_builtin_hashlib_hashes]) AC_DEFINE_UNQUOTED([PY_BUILTIN_HASHLIB_HASHES], ["$with_builtin_hashlib_hashes"], [enabled builtin hash modules]) as_save_IFS=$IFS IFS=, for builtin_hash in $with_builtin_hashlib_hashes; do AS_CASE([$builtin_hash], [md5], [with_builtin_md5=yes], [sha1], [with_builtin_sha1=yes], [sha2], [with_builtin_sha2=yes], [sha3], [with_builtin_sha3=yes], [blake2], [with_builtin_blake2=yes] ) done IFS=$as_save_IFS # Check whether to disable test modules. Once set, setup.py will not build # test extension modules and "make install" will not install test suites. AC_MSG_CHECKING([for --disable-test-modules]) AC_ARG_ENABLE([test-modules], [AS_HELP_STRING([--disable-test-modules], [don't build nor install test modules])], [ AS_VAR_IF([enable_test_modules], [yes], [TEST_MODULES=yes], [TEST_MODULES=no]) ], [ AS_CASE([$ac_sys_system/$ac_sys_emscripten_target], [Emscripten/browser*], [TEST_MODULES=no], [TEST_MODULES=yes] ) ]) AC_MSG_RESULT([$TEST_MODULES]) AC_SUBST([TEST_MODULES]) # gh-109054: Check if -latomic is needed to get atomic functions. # On Linux aarch64, GCC may require programs and libraries to be linked # explicitly to libatomic. Call _Py_atomic_or_uint64() which may require # libatomic __atomic_fetch_or_8(), or not, depending on the C compiler and the # compiler flags. # # gh-112779: On RISC-V, GCC 12 and earlier require libatomic support for 1-byte # and 2-byte operations, but not for 8-byte operations. # # Avoid #include or #include . The header # requires header which is only written below by AC_OUTPUT below. # If the check is done after AC_OUTPUT, modifying LIBS has no effect # anymore. cannot be included alone, it's designed to be included # by : it expects other includes and macros to be defined. _SAVE_VAR([CPPFLAGS]) CPPFLAGS="${BASECPPFLAGS} -I. -I${srcdir}/Include ${CPPFLAGS}" AC_CACHE_CHECK([whether libatomic is needed by ], [ac_cv_libatomic_needed], [AC_RUN_IFELSE([AC_LANG_SOURCE([[ // pyatomic.h needs uint64_t and Py_ssize_t types #include // int64_t, intptr_t #ifdef HAVE_SYS_TYPES_H # include // ssize_t #endif // Code adapted from Include/pyport.h #if HAVE_SSIZE_T typedef ssize_t Py_ssize_t; #elif SIZEOF_VOID_P == SIZEOF_SIZE_T typedef intptr_t Py_ssize_t; #else # error "unable to define Py_ssize_t" #endif #include "pyatomic.h" int main() { uint64_t value; _Py_atomic_store_uint64(&value, 2); if (_Py_atomic_or_uint64(&value, 8) != 2) { return 1; // error } if (_Py_atomic_load_uint64(&value) != 10) { return 1; // error } uint8_t byte = 0xb8; if (_Py_atomic_or_uint8(&byte, 0x2d) != 0xb8) { return 1; // error } if (_Py_atomic_load_uint8(&byte) != 0xbd) { return 1; // error } return 0; // all good } ]])], [ac_cv_libatomic_needed=no], dnl build succeeded [ac_cv_libatomic_needed=yes], dnl build failed [ac_cv_libatomic_needed=no]) dnl cross compilation ]) AS_VAR_IF([ac_cv_libatomic_needed], [yes], [LIBS="${LIBS} -latomic" LIBATOMIC=${LIBATOMIC-"-latomic"}]) _RESTORE_VAR([CPPFLAGS]) # stdlib AC_DEFUN([PY_STDLIB_MOD_SET_NA], [ m4_foreach([mod], [$@], [ AS_VAR_SET([py_cv_module_]mod, [n/a])]) ]) # stdlib not available dnl Modules that are not available on some platforms AS_CASE([$ac_sys_system], [AIX], [PY_STDLIB_MOD_SET_NA([_scproxy])], [VxWorks*], [PY_STDLIB_MOD_SET_NA([_scproxy], [termios], [grp])], dnl The _scproxy module is available on macOS [Darwin], [], [iOS], [ dnl subprocess and multiprocessing are not supported (no fork syscall). dnl curses and tkinter user interface are not available. dnl gdbm and nis aren't available dnl Stub implementations are provided for pwd, grp etc APIs PY_STDLIB_MOD_SET_NA( [_curses], [_curses_panel], [_gdbm], [_multiprocessing], [_posixshmem], [_posixsubprocess], [_scproxy], [_tkinter], [grp], [nis], [readline], [pwd], [spwd], [syslog], ) ], [CYGWIN*], [PY_STDLIB_MOD_SET_NA([_scproxy])], [QNX*], [PY_STDLIB_MOD_SET_NA([_scproxy])], [FreeBSD*], [PY_STDLIB_MOD_SET_NA([_scproxy])], [Emscripten|WASI], [ dnl subprocess and multiprocessing are not supported (no fork syscall). dnl curses and tkinter user interface are not available. dnl dbm and gdbm aren't available, too. dnl Emscripten and WASI provide only stubs for pwd, grp APIs. dnl resource functions (get/setrusage) are stubs, too. PY_STDLIB_MOD_SET_NA( [_curses], [_curses_panel], [_dbm], [_gdbm], [_multiprocessing], [_posixshmem], [_posixsubprocess], [_scproxy], [_tkinter], [_interpreters], [_interpchannels], [_interpqueues], [grp], [pwd], [resource], [syslog], ) AS_CASE([$ac_sys_system/$ac_sys_emscripten_target], [Emscripten/browser*], [ dnl These modules are not particularly useful in browsers. PY_STDLIB_MOD_SET_NA( [fcntl], [readline], [termios], ) ], [Emscripten/node*], [], [WASI/*], [ dnl WASI SDK 15.0 does not support file locking, mmap, and more. dnl Test modules that must be compiled as shared libraries are not supported dnl (see Modules/Setup.stdlib.in). PY_STDLIB_MOD_SET_NA( [_ctypes_test], [_testexternalinspection], [_testimportmultiple], [_testmultiphase], [_testsinglephase], [fcntl], [mmap], [termios], [xxlimited], [xxlimited_35], ) ] ) ], [PY_STDLIB_MOD_SET_NA([_scproxy])] ) dnl AC_MSG_NOTICE([m4_set_list([_PY_STDLIB_MOD_SET_NA])]) dnl Default value for Modules/Setup.stdlib build type AS_CASE([$host_cpu], [wasm32|wasm64], [MODULE_BUILDTYPE=static], [MODULE_BUILDTYPE=${MODULE_BUILDTYPE:-shared}] ) AC_SUBST([MODULE_BUILDTYPE]) dnl _MODULE_BLOCK_ADD([VAR], [VALUE]) dnl internal: adds $1=quote($2) to MODULE_BLOCK AC_DEFUN([_MODULE_BLOCK_ADD], [AS_VAR_APPEND([MODULE_BLOCK], ["$1=_AS_QUOTE([$2])$as_nl"])]) MODULE_BLOCK= dnl Check for stdlib extension modules dnl PY_STDLIB_MOD([NAME], [ENABLED-TEST], [SUPPORTED-TEST], [CFLAGS], [LDFLAGS]) dnl sets MODULE_$NAME_STATE based on PY_STDLIB_MOD_SET_NA(), ENABLED-TEST, dnl and SUPPORTED_TEST. ENABLED-TEST and SUPPORTED-TEST default to true if dnl empty. dnl n/a: marked unavailable on platform by PY_STDLIB_MOD_SET_NA() dnl yes: enabled and supported dnl missing: enabled and not supported dnl disabled: not enabled dnl sets MODULE_$NAME_CFLAGS and MODULE_$NAME_LDFLAGS AC_DEFUN([PY_STDLIB_MOD], [ AC_MSG_CHECKING([for stdlib extension module $1]) m4_pushdef([modcond], [MODULE_]m4_toupper([$1]))dnl m4_pushdef([modstate], [py_cv_module_$1])dnl dnl Check if module has been disabled by PY_STDLIB_MOD_SET_NA() AS_IF([test "$modstate" != "n/a"], [ AS_IF([m4_ifblank([$2], [true], [$2])], [AS_IF([m4_ifblank([$3], [true], [$3])], [modstate=yes], [modstate=missing])], [modstate=disabled]) ]) _MODULE_BLOCK_ADD(modcond[_STATE], [$modstate]) AS_VAR_IF([modstate], [yes], [ m4_ifblank([$4], [], [_MODULE_BLOCK_ADD([MODULE_]m4_toupper([$1])[_CFLAGS], [$4])]) m4_ifblank([$5], [], [_MODULE_BLOCK_ADD([MODULE_]m4_toupper([$1])[_LDFLAGS], [$5])]) ]) AM_CONDITIONAL(modcond, [test "$modstate" = yes]) AC_MSG_RESULT([$modstate]) m4_popdef([modcond])dnl m4_popdef([modstate])dnl ]) dnl Define simple stdlib extension module dnl Always enable unless the module is disabled by PY_STDLIB_MOD_SET_NA dnl PY_STDLIB_MOD_SIMPLE([NAME], [CFLAGS], [LDFLAGS]) dnl cflags and ldflags are optional AC_DEFUN([PY_STDLIB_MOD_SIMPLE], [ m4_pushdef([modcond], [MODULE_]m4_toupper([$1]))dnl m4_pushdef([modstate], [py_cv_module_$1])dnl dnl Check if module has been disabled by PY_STDLIB_MOD_SET_NA() AS_IF([test "$modstate" != "n/a"], [modstate=yes]) AM_CONDITIONAL(modcond, [test "$modstate" = yes]) _MODULE_BLOCK_ADD(modcond[_STATE], [$modstate]) AS_VAR_IF([modstate], [yes], [ m4_ifblank([$2], [], [_MODULE_BLOCK_ADD([MODULE_]m4_toupper([$1])[_CFLAGS], [$2])]) m4_ifblank([$3], [], [_MODULE_BLOCK_ADD([MODULE_]m4_toupper([$1])[_LDFLAGS], [$3])]) ]) m4_popdef([modcond])dnl m4_popdef([modstate])dnl ]) dnl static modules in Modules/Setup.bootstrap PY_STDLIB_MOD_SIMPLE([_io], [-I\$(srcdir)/Modules/_io], []) PY_STDLIB_MOD_SIMPLE([time], [], [$TIMEMODULE_LIB]) dnl always enabled extension modules PY_STDLIB_MOD_SIMPLE([array]) PY_STDLIB_MOD_SIMPLE([_asyncio]) PY_STDLIB_MOD_SIMPLE([_bisect]) PY_STDLIB_MOD_SIMPLE([_contextvars]) PY_STDLIB_MOD_SIMPLE([_csv]) PY_STDLIB_MOD_SIMPLE([_heapq]) PY_STDLIB_MOD_SIMPLE([_json]) PY_STDLIB_MOD_SIMPLE([_lsprof]) PY_STDLIB_MOD_SIMPLE([_pickle]) PY_STDLIB_MOD_SIMPLE([_posixsubprocess]) PY_STDLIB_MOD_SIMPLE([_queue]) PY_STDLIB_MOD_SIMPLE([_random]) PY_STDLIB_MOD_SIMPLE([select]) PY_STDLIB_MOD_SIMPLE([_struct]) PY_STDLIB_MOD_SIMPLE([_typing]) PY_STDLIB_MOD_SIMPLE([_interpreters]) PY_STDLIB_MOD_SIMPLE([_interpchannels]) PY_STDLIB_MOD_SIMPLE([_interpqueues]) PY_STDLIB_MOD_SIMPLE([_zoneinfo]) dnl multiprocessing modules PY_STDLIB_MOD([_multiprocessing], [], [test "$ac_cv_func_sem_unlink" = "yes"], [-I\$(srcdir)/Modules/_multiprocessing]) PY_STDLIB_MOD([_posixshmem], [], [test "$have_posix_shmem" = "yes"], [$POSIXSHMEM_CFLAGS], [$POSIXSHMEM_LIBS]) dnl needs libm PY_STDLIB_MOD_SIMPLE([_statistics], [], [$LIBM]) PY_STDLIB_MOD_SIMPLE([cmath], [], [$LIBM]) PY_STDLIB_MOD_SIMPLE([math], [], [$LIBM]) dnl needs libm and on some platforms librt PY_STDLIB_MOD_SIMPLE([_datetime], [], [$TIMEMODULE_LIB $LIBM]) dnl modules with some unix dependencies PY_STDLIB_MOD([fcntl], [], [test "$ac_cv_header_sys_ioctl_h" = "yes" -a "$ac_cv_header_fcntl_h" = "yes"], [], [$FCNTL_LIBS]) PY_STDLIB_MOD([mmap], [], [test "$ac_cv_header_sys_mman_h" = "yes" -a "$ac_cv_header_sys_stat_h" = "yes"]) PY_STDLIB_MOD([_socket], [], m4_flatten([test "$ac_cv_header_sys_socket_h" = "yes" -a "$ac_cv_header_sys_types_h" = "yes" -a "$ac_cv_header_netinet_in_h" = "yes"])) dnl platform specific extensions PY_STDLIB_MOD([grp], [], [test "$ac_cv_func_getgrent" = "yes" && { test "$ac_cv_func_getgrgid" = "yes" || test "$ac_cv_func_getgrgid_r" = "yes"; }]) PY_STDLIB_MOD([pwd], [], [test "$ac_cv_func_getpwuid" = yes -o "$ac_cv_func_getpwuid_r" = yes]) PY_STDLIB_MOD([resource], [], [test "$ac_cv_header_sys_resource_h" = yes]) PY_STDLIB_MOD([_scproxy], [test "$ac_sys_system" = "Darwin"], [], [], [-framework SystemConfiguration -framework CoreFoundation]) PY_STDLIB_MOD([syslog], [], [test "$ac_cv_header_syslog_h" = yes]) PY_STDLIB_MOD([termios], [], [test "$ac_cv_header_termios_h" = yes]) dnl _elementtree loads libexpat via CAPI hook in pyexpat PY_STDLIB_MOD([pyexpat], [], [test "$ac_cv_header_sys_time_h" = "yes"], [$LIBEXPAT_CFLAGS], [$LIBEXPAT_LDFLAGS]) PY_STDLIB_MOD([_elementtree], [], [], [$LIBEXPAT_CFLAGS], []) PY_STDLIB_MOD_SIMPLE([_codecs_cn]) PY_STDLIB_MOD_SIMPLE([_codecs_hk]) PY_STDLIB_MOD_SIMPLE([_codecs_iso2022]) PY_STDLIB_MOD_SIMPLE([_codecs_jp]) PY_STDLIB_MOD_SIMPLE([_codecs_kr]) PY_STDLIB_MOD_SIMPLE([_codecs_tw]) PY_STDLIB_MOD_SIMPLE([_multibytecodec]) PY_STDLIB_MOD_SIMPLE([unicodedata]) dnl By default we always compile these even when OpenSSL is available dnl (issue #14693). The modules are small. PY_STDLIB_MOD([_md5], [test "$with_builtin_md5" = yes]) PY_STDLIB_MOD([_sha1], [test "$with_builtin_sha1" = yes]) PY_STDLIB_MOD([_sha2], [test "$with_builtin_sha2" = yes]) PY_STDLIB_MOD([_sha3], [test "$with_builtin_sha3" = yes]) PY_STDLIB_MOD([_blake2], [test "$with_builtin_blake2" = yes]) LIBHACL_CFLAGS='-I$(srcdir)/Modules/_hacl -I$(srcdir)/Modules/_hacl/include -D_BSD_SOURCE -D_DEFAULT_SOURCE $(PY_STDMODULE_CFLAGS) $(CCSHARED)' case "$ac_sys_system" in Linux*) if test "$ac_cv_func_explicit_bzero" = "no"; then LIBHACL_CFLAGS="$LIBHACL_CFLAGS -DLINUX_NO_EXPLICIT_BZERO" fi ;; esac AC_SUBST([LIBHACL_CFLAGS]) # The SIMD files use aligned_alloc, which is not available on older versions of # Android. if test "$ac_sys_system" != "Linux-android" || test "$ANDROID_API_LEVEL" -ge 28; then dnl This can be extended here to detect e.g. Power8, which HACL* should also support. AX_CHECK_COMPILE_FLAG([-msse -msse2 -msse3 -msse4.1 -msse4.2],[ [LIBHACL_SIMD128_FLAGS="-msse -msse2 -msse3 -msse4.1 -msse4.2"] AC_DEFINE([HACL_CAN_COMPILE_SIMD128], [1], [HACL* library can compile SIMD128 implementations]) # macOS universal2 builds *support* the -msse etc flags because they're # available on x86_64. However, performance of the HACL SIMD128 implementation # isn't great, so it's disabled on ARM64. AC_MSG_CHECKING([for HACL* SIMD128 implementation]) if test "$UNIVERSAL_ARCHS" == "universal2"; then [LIBHACL_SIMD128_OBJS="Modules/_hacl/Hacl_Hash_Blake2s_Simd128_universal2.o"] AC_MSG_RESULT([universal2]) else [LIBHACL_SIMD128_OBJS="Modules/_hacl/Hacl_Hash_Blake2s_Simd128.o"] AC_MSG_RESULT([standard]) fi ], [], [-Werror]) fi AC_SUBST([LIBHACL_SIMD128_FLAGS]) AC_SUBST([LIBHACL_SIMD128_OBJS]) # The SIMD files use aligned_alloc, which is not available on older versions of # Android. # # Although AVX support is not guaranteed on Android # (https://developer.android.com/ndk/guides/abis#86-64), this is safe because we do a # runtime CPUID check. if test "$ac_sys_system" != "Linux-android" || test "$ANDROID_API_LEVEL" -ge 28; then AX_CHECK_COMPILE_FLAG([-mavx2],[ [LIBHACL_SIMD256_FLAGS="-mavx2"] AC_DEFINE([HACL_CAN_COMPILE_SIMD256], [1], [HACL* library can compile SIMD256 implementations]) # macOS universal2 builds *support* the -mavx2 compiler flag because it's # available on x86_64; but the HACL SIMD256 build then fails because the # implementation requires symbols that aren't available on ARM64. Use a # wrapped implementation if we're building for universal2. AC_MSG_CHECKING([for HACL* SIMD256 implementation]) if test "$UNIVERSAL_ARCHS" == "universal2"; then [LIBHACL_SIMD256_OBJS="Modules/_hacl/Hacl_Hash_Blake2b_Simd256_universal2.o"] AC_MSG_RESULT([universal2]) else [LIBHACL_SIMD256_OBJS="Modules/_hacl/Hacl_Hash_Blake2b_Simd256.o"] AC_MSG_RESULT([standard]) fi ], [], [-Werror]) fi AC_SUBST([LIBHACL_SIMD256_FLAGS]) AC_SUBST([LIBHACL_SIMD256_OBJS]) PY_STDLIB_MOD([_ctypes], [], [test "$have_libffi" = yes], [$NO_STRICT_OVERFLOW_CFLAGS $LIBFFI_CFLAGS], [$LIBFFI_LIBS]) PY_STDLIB_MOD([_curses], [], [test "$have_curses" = "yes"], [$CURSES_CFLAGS], [$CURSES_LIBS] ) PY_STDLIB_MOD([_curses_panel], [], [test "$have_curses" = "yes" && test "$have_panel" = "yes"], [$PANEL_CFLAGS $CURSES_CFLAGS], [$PANEL_LIBS $CURSES_LIBS] ) PY_STDLIB_MOD([_decimal], [], [test "$have_mpdec" = "yes"], [$LIBMPDEC_CFLAGS], [$LIBMPDEC_LIBS]) PY_STDLIB_MOD([_dbm], [test -n "$with_dbmliborder"], [test "$have_dbm" != "no"], [$DBM_CFLAGS], [$DBM_LIBS]) PY_STDLIB_MOD([_gdbm], [test "$have_gdbm_dbmliborder" = yes], [test "$have_gdbm" = yes], [$GDBM_CFLAGS], [$GDBM_LIBS]) PY_STDLIB_MOD([readline], [], [test "$with_readline" != "no"], [$READLINE_CFLAGS], [$READLINE_LIBS]) PY_STDLIB_MOD([_sqlite3], [test "$have_sqlite3" = "yes"], [test "$have_supported_sqlite3" = "yes"], [$LIBSQLITE3_CFLAGS], [$LIBSQLITE3_LIBS]) PY_STDLIB_MOD([_tkinter], [], [test "$have_tcltk" = "yes"], [$TCLTK_CFLAGS], [$TCLTK_LIBS]) PY_STDLIB_MOD([_uuid], [], [test "$have_uuid" = "yes"], [$LIBUUID_CFLAGS], [$LIBUUID_LIBS]) dnl compression libs PY_STDLIB_MOD([zlib], [], [test "$have_zlib" = yes], [$ZLIB_CFLAGS], [$ZLIB_LIBS]) dnl binascii can use zlib for optimized crc32. PY_STDLIB_MOD_SIMPLE([binascii], [$BINASCII_CFLAGS], [$BINASCII_LIBS]) PY_STDLIB_MOD([_bz2], [], [test "$have_bzip2" = yes], [$BZIP2_CFLAGS], [$BZIP2_LIBS]) PY_STDLIB_MOD([_lzma], [], [test "$have_liblzma" = yes], [$LIBLZMA_CFLAGS], [$LIBLZMA_LIBS]) dnl OpenSSL bindings PY_STDLIB_MOD([_ssl], [], [test "$ac_cv_working_openssl_ssl" = yes], [$OPENSSL_INCLUDES], [$OPENSSL_LDFLAGS $OPENSSL_LDFLAGS_RPATH $OPENSSL_LIBS]) PY_STDLIB_MOD([_hashlib], [], [test "$ac_cv_working_openssl_hashlib" = yes], [$OPENSSL_INCLUDES], [$OPENSSL_LDFLAGS $OPENSSL_LDFLAGS_RPATH $LIBCRYPTO_LIBS]) dnl test modules PY_STDLIB_MOD([_testcapi], [test "$TEST_MODULES" = yes], dnl Modules/_testcapi needs -latomic for 32bit AIX build [], [], [$LIBATOMIC]) PY_STDLIB_MOD([_testclinic], [test "$TEST_MODULES" = yes]) PY_STDLIB_MOD([_testclinic_limited], [test "$TEST_MODULES" = yes]) PY_STDLIB_MOD([_testlimitedcapi], [test "$TEST_MODULES" = yes]) PY_STDLIB_MOD([_testinternalcapi], [test "$TEST_MODULES" = yes]) PY_STDLIB_MOD([_testbuffer], [test "$TEST_MODULES" = yes]) PY_STDLIB_MOD([_testimportmultiple], [test "$TEST_MODULES" = yes], [test "$ac_cv_func_dlopen" = yes]) PY_STDLIB_MOD([_testmultiphase], [test "$TEST_MODULES" = yes], [test "$ac_cv_func_dlopen" = yes]) PY_STDLIB_MOD([_testsinglephase], [test "$TEST_MODULES" = yes], [test "$ac_cv_func_dlopen" = yes]) PY_STDLIB_MOD([_testexternalinspection], [test "$TEST_MODULES" = yes]) PY_STDLIB_MOD([xxsubtype], [test "$TEST_MODULES" = yes]) PY_STDLIB_MOD([_xxtestfuzz], [test "$TEST_MODULES" = yes]) PY_STDLIB_MOD([_ctypes_test], [test "$TEST_MODULES" = yes], [test "$have_libffi" = yes -a "$ac_cv_func_dlopen" = yes], [$LIBFFI_CFLAGS], [$LIBFFI_LIBS $LIBM]) dnl Limited API template modules. dnl Emscripten does not support shared libraries yet. PY_STDLIB_MOD([xxlimited], [test "$TEST_MODULES" = yes], [test "$ac_cv_func_dlopen" = yes]) PY_STDLIB_MOD([xxlimited_35], [test "$TEST_MODULES" = yes], [test "$ac_cv_func_dlopen" = yes]) # substitute multiline block, must come after last PY_STDLIB_MOD() AC_SUBST([MODULE_BLOCK]) # generate output files AC_CONFIG_FILES(m4_normalize([ Makefile.pre Misc/python.pc Misc/python-embed.pc Misc/python-config.sh ])) AC_CONFIG_FILES(m4_normalize([ Modules/Setup.bootstrap Modules/Setup.stdlib ])) AC_CONFIG_FILES([Modules/ld_so_aix], [chmod +x Modules/ld_so_aix]) # Generate files like pyconfig.h AC_OUTPUT AC_MSG_NOTICE([creating Modules/Setup.local]) if test ! -f Modules/Setup.local then echo "# Edit this file for local setup changes" >Modules/Setup.local fi AC_MSG_NOTICE([creating Makefile]) $SHELL $srcdir/Modules/makesetup -c $srcdir/Modules/config.c.in \ -s Modules \ Modules/Setup.local Modules/Setup.stdlib Modules/Setup.bootstrap $srcdir/Modules/Setup if test $? -ne 0; then AC_MSG_ERROR([makesetup failed]) fi mv config.c Modules if test -z "$PKG_CONFIG"; then AC_MSG_WARN([pkg-config is missing. Some dependencies may not be detected correctly.]) fi if test "$Py_OPT" = 'false' -a "$Py_DEBUG" != 'true'; then AC_MSG_NOTICE([ If you want a release build with all stable optimizations active (PGO, etc), please run ./configure --enable-optimizations ]) fi AS_VAR_IF([PY_SUPPORT_TIER], [0], [AC_MSG_WARN([ Platform "$host" with compiler "$ac_cv_cc_name" is not supported by the CPython core team, see https://peps.python.org/pep-0011/ for more information. ])]) if test "$ac_cv_header_stdatomic_h" != "yes"; then AC_MSG_NOTICE(m4_normalize([ Your compiler or platform does have a working C11 stdatomic.h. A future version of Python may require stdatomic.h. ])) fi