more granular configure checks for clock_* functions (closes #28081)

Modules/timemodule.c

@@ -160,7 +160,9 @@ PyDoc_STRVAR(clock_gettime_doc,
 "clock_gettime(clk_id) -> floating point number\n\
 \n\
 Return the time of the specified clock clk_id.");
+#endif   /* HAVE_CLOCK_GETTIME */
 
+#ifdef HAVE_CLOCK_SETTIME
 static PyObject *
 time_clock_settime(PyObject *self, PyObject *args)
 {
@@ -191,7 +193,9 @@ PyDoc_STRVAR(clock_settime_doc,
 "clock_settime(clk_id, time)\n\
 \n\
 Set the time of the specified clock clk_id.");
+#endif   /* HAVE_CLOCK_SETTIME */
 
+#ifdef HAVE_CLOCK_GETRES
 static PyObject *
 time_clock_getres(PyObject *self, PyObject *args)
 {
@@ -215,7 +219,7 @@ PyDoc_STRVAR(clock_getres_doc,
 "clock_getres(clk_id) -> floating point number\n\
 \n\
 Return the resolution (precision) of the specified clock clk_id.");
-#endif   /* HAVE_CLOCK_GETTIME */
+#endif   /* HAVE_CLOCK_GETRES */
 
 static PyObject *
 time_sleep(PyObject *self, PyObject *obj)
@@ -1287,7 +1291,11 @@ static PyMethodDef time_methods[] = {
 #endif
 #ifdef HAVE_CLOCK_GETTIME
     {"clock_gettime",   time_clock_gettime, METH_VARARGS, clock_gettime_doc},
+#endif
+#ifdef HAVE_CLOCK_SETTIME
     {"clock_settime",   time_clock_settime, METH_VARARGS, clock_settime_doc},
+#endif
+#ifdef HAVE_CLOCK_GETRES
     {"clock_getres",    time_clock_getres, METH_VARARGS, clock_getres_doc},
 #endif
     {"sleep",           time_sleep, METH_O, sleep_doc},
@@ -1383,8 +1391,9 @@ PyInit_time(void)
     /* Set, or reset, module variables like time.timezone */
     PyInit_timezone(m);
 
-#if defined(HAVE_CLOCK_GETTIME)
+#ifdef CLOCK_REALTIME
     PyModule_AddIntMacro(m, CLOCK_REALTIME);
+#endif
 #ifdef CLOCK_MONOTONIC
     PyModule_AddIntMacro(m, CLOCK_MONOTONIC);
 #endif
@@ -1400,7 +1409,6 @@ PyInit_time(void)
 #ifdef CLOCK_THREAD_CPUTIME_ID
     PyModule_AddIntMacro(m, CLOCK_THREAD_CPUTIME_ID);
 #endif
-#endif /* HAVE_CLOCK_GETTIME */
 
     if (!initialized) {
         if (PyStructSequence_InitType2(&StructTimeType,

configure

@@ -784,6 +784,7 @@ infodir
 docdir
 oldincludedir
 includedir
+runstatedir
 localstatedir
 sharedstatedir
 sysconfdir
@@ -894,6 +895,7 @@ datadir='${datarootdir}'
 sysconfdir='${prefix}/etc'
 sharedstatedir='${prefix}/com'
 localstatedir='${prefix}/var'
+runstatedir='${localstatedir}/run'
 includedir='${prefix}/include'
 oldincludedir='/usr/include'
 docdir='${datarootdir}/doc/${PACKAGE_TARNAME}'
@@ -1146,6 +1148,15 @@ do
   | -silent | --silent | --silen | --sile | --sil)
     silent=yes ;;
 
+  -runstatedir | --runstatedir | --runstatedi | --runstated \
+  | --runstate | --runstat | --runsta | --runst | --runs \
+  | --run | --ru | --r)
+    ac_prev=runstatedir ;;
+  -runstatedir=* | --runstatedir=* | --runstatedi=* | --runstated=* \
+  | --runstate=* | --runstat=* | --runsta=* | --runst=* | --runs=* \
+  | --run=* | --ru=* | --r=*)
+    runstatedir=$ac_optarg ;;
+
   -sbindir | --sbindir | --sbindi | --sbind | --sbin | --sbi | --sb)
     ac_prev=sbindir ;;
   -sbindir=* | --sbindir=* | --sbindi=* | --sbind=* | --sbin=* \
@@ -1283,7 +1294,7 @@ fi
 for ac_var in	exec_prefix prefix bindir sbindir libexecdir datarootdir \
 		datadir sysconfdir sharedstatedir localstatedir includedir \
 		oldincludedir docdir infodir htmldir dvidir pdfdir psdir \
-		libdir localedir mandir
+		libdir localedir mandir runstatedir
 do
   eval ac_val=\$$ac_var
   # Remove trailing slashes.
@@ -1436,6 +1447,7 @@ Fine tuning of the installation directories:
   --sysconfdir=DIR        read-only single-machine data [PREFIX/etc]
   --sharedstatedir=DIR    modifiable architecture-independent data [PREFIX/com]
   --localstatedir=DIR     modifiable single-machine data [PREFIX/var]
+  --runstatedir=DIR       modifiable per-process data [LOCALSTATEDIR/run]
   --libdir=DIR            object code libraries [EPREFIX/lib]
   --includedir=DIR        C header files [PREFIX/include]
   --oldincludedir=DIR     C header files for non-gcc [/usr/include]
@@ -12571,6 +12583,64 @@ fi
 done
 
 
+for ac_func in clock_settime
+do :
+  ac_fn_c_check_func "$LINENO" "clock_settime" "ac_cv_func_clock_settime"
+if test "x$ac_cv_func_clock_settime" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_CLOCK_SETTIME 1
+_ACEOF
+
+else
+
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for clock_settime in -lrt" >&5
+$as_echo_n "checking for clock_settime in -lrt... " >&6; }
+if ${ac_cv_lib_rt_clock_settime+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lrt  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char clock_settime ();
+int
+main ()
+{
+return clock_settime ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_rt_clock_settime=yes
+else
+  ac_cv_lib_rt_clock_settime=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_rt_clock_settime" >&5
+$as_echo "$ac_cv_lib_rt_clock_settime" >&6; }
+if test "x$ac_cv_lib_rt_clock_settime" = xyes; then :
+
+        $as_echo "#define HAVE_CLOCK_SETTIME 1" >>confdefs.h
+
+
+fi
+
+
+fi
+done
+
+
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for major" >&5
 $as_echo_n "checking for major... " >&6; }
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext

configure.ac

@@ -3734,6 +3734,12 @@ AC_CHECK_FUNCS(clock_getres, [], [
     ])
 ])
 
+AC_CHECK_FUNCS(clock_settime, [], [
+    AC_CHECK_LIB(rt, clock_settime, [
+        AC_DEFINE(HAVE_CLOCK_SETTIME, 1)
+    ])
+])
+
 AC_MSG_CHECKING(for major, minor, and makedev)
 AC_LINK_IFELSE([AC_LANG_PROGRAM([[
 #if defined(MAJOR_IN_MKDEV)

pyconfig.h.in

@@ -125,6 +125,9 @@
 /* Define to 1 if you have the `clock_gettime' function. */
 #undef HAVE_CLOCK_GETTIME
 
+/* Define to 1 if you have the `clock_settime' function. */
+#undef HAVE_CLOCK_SETTIME
+
 /* Define if the C compiler supports computed gotos. */
 #undef HAVE_COMPUTED_GOTOS