Improve the test for dirfd(). Some systems #define it rather than
have it as a library function.
This commit is contained in:
Gregory P. Smith
commit
1577cf758b
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@ -2242,6 +2242,52 @@ $as_echo "$ac_res" >&6; }
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} # ac_fn_c_check_func
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# ac_fn_c_check_decl LINENO SYMBOL VAR INCLUDES
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# ---------------------------------------------
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# Tests whether SYMBOL is declared in INCLUDES, setting cache variable VAR
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# accordingly.
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ac_fn_c_check_decl ()
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{
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as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
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as_decl_name=`echo $2|sed 's/ *(.*//'`
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as_decl_use=`echo $2|sed -e 's/(/((/' -e 's/)/) 0&/' -e 's/,/) 0& (/g'`
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $as_decl_name is declared" >&5
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$as_echo_n "checking whether $as_decl_name is declared... " >&6; }
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if eval \${$3+:} false; then :
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$as_echo_n "(cached) " >&6
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else
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cat confdefs.h - <<_ACEOF >conftest.$ac_ext
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/* end confdefs.h. */
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$4
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int
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main ()
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{
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#ifndef $as_decl_name
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#ifdef __cplusplus
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(void) $as_decl_use;
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#else
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(void) $as_decl_name;
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#endif
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#endif
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;
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return 0;
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}
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_ACEOF
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if ac_fn_c_try_compile "$LINENO"; then :
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eval "$3=yes"
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else
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eval "$3=no"
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fi
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rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
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fi
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eval ac_res=\$$3
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
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$as_echo "$ac_res" >&6; }
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eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
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} # ac_fn_c_check_decl
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# ac_fn_c_check_member LINENO AGGR MEMBER VAR INCLUDES
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# ----------------------------------------------------
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# Tries to find if the field MEMBER exists in type AGGR, after including
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@ -2298,52 +2344,6 @@ $as_echo "$ac_res" >&6; }
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eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
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} # ac_fn_c_check_member
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# ac_fn_c_check_decl LINENO SYMBOL VAR INCLUDES
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# ---------------------------------------------
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# Tests whether SYMBOL is declared in INCLUDES, setting cache variable VAR
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# accordingly.
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ac_fn_c_check_decl ()
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{
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as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
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as_decl_name=`echo $2|sed 's/ *(.*//'`
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as_decl_use=`echo $2|sed -e 's/(/((/' -e 's/)/) 0&/' -e 's/,/) 0& (/g'`
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $as_decl_name is declared" >&5
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$as_echo_n "checking whether $as_decl_name is declared... " >&6; }
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if eval \${$3+:} false; then :
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$as_echo_n "(cached) " >&6
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else
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cat confdefs.h - <<_ACEOF >conftest.$ac_ext
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/* end confdefs.h. */
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$4
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int
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main ()
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{
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#ifndef $as_decl_name
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#ifdef __cplusplus
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(void) $as_decl_use;
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#else
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(void) $as_decl_name;
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#endif
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#endif
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;
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return 0;
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}
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_ACEOF
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if ac_fn_c_try_compile "$LINENO"; then :
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eval "$3=yes"
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else
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eval "$3=no"
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fi
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rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
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fi
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eval ac_res=\$$3
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
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$as_echo "$ac_res" >&6; }
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eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
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} # ac_fn_c_check_decl
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cat >config.log <<_ACEOF
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This file contains any messages produced by compilers while
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running configure, to aid debugging if configure makes a mistake.
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@ -9396,7 +9396,7 @@ $as_echo "MACHDEP_OBJS" >&6; }
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# checks for library functions
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for ac_func in alarm accept4 setitimer getitimer bind_textdomain_codeset chown \
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clock confstr ctermid dirfd execv faccessat fchmod fchmodat fchown fchownat \
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clock confstr ctermid execv faccessat fchmod fchmodat fchown fchownat \
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fexecve fdopendir fork fpathconf fstatat ftime ftruncate futimesat \
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futimens futimes gai_strerror \
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getgrouplist getgroups getlogin getloadavg getpeername getpgid getpid \
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@ -9429,6 +9429,16 @@ fi
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done
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ac_fn_c_check_decl "$LINENO" "dirfd" "ac_cv_have_decl_dirfd" "#include <sys/types.h>
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#include <dirent.h>
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"
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if test "x$ac_cv_have_decl_dirfd" = xyes; then :
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$as_echo "#define HAVE_DIRFD 1" >>confdefs.h
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fi
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# For some functions, having a definition is not sufficient, since
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# we want to take their address.
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for chroot" >&5
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@ -2562,7 +2562,7 @@ AC_MSG_RESULT(MACHDEP_OBJS)
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# checks for library functions
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AC_CHECK_FUNCS(alarm accept4 setitimer getitimer bind_textdomain_codeset chown \
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clock confstr ctermid dirfd execv faccessat fchmod fchmodat fchown fchownat \
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clock confstr ctermid execv faccessat fchmod fchmodat fchown fchownat \
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fexecve fdopendir fork fpathconf fstatat ftime ftruncate futimesat \
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futimens futimes gai_strerror \
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getgrouplist getgroups getlogin getloadavg getpeername getpgid getpid \
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@ -2584,6 +2584,12 @@ AC_CHECK_FUNCS(alarm accept4 setitimer getitimer bind_textdomain_codeset chown \
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truncate uname unlinkat unsetenv utimensat utimes waitid waitpid wait3 wait4 \
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wcscoll wcsftime wcsxfrm writev _getpty)
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AC_CHECK_DECL(dirfd,
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AC_DEFINE(HAVE_DIRFD, 1,
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Define if you have the 'dirfd' function or macro.), ,
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[#include <sys/types.h>
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#include <dirent.h>])
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# For some functions, having a definition is not sufficient, since
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# we want to take their address.
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AC_MSG_CHECKING(for chroot)
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@ -181,7 +181,7 @@
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*/
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#undef HAVE_DIRENT_H
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/* Define to 1 if you have the `dirfd' function. */
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/* Define if you have the 'dirfd' function or macro. */
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#undef HAVE_DIRFD
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/* Define to 1 if you have the <dlfcn.h> header file. */
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