PR tree-optimization/51247

[pf3gnuchains/gcc-fork.git] / libstdc++-v3 / acinclude.m4

diff --git a/libstdc++-v3/acinclude.m4 b/libstdc++-v3/acinclude.m4
index 684a295..fee5c6f 100644 (file)
--- a/libstdc++-v3/acinclude.m4
+++ b/libstdc++-v3/acinclude.m4
@@ -1641,6 +1641,9 @@ AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [
   # Check for the existence of the <stdbool.h> header.
   AC_CHECK_HEADERS(stdbool.h)
 
+  # Check for the existence of the <stdalign.h> header.
+  AC_CHECK_HEADERS(stdalign.h)
+
   CXXFLAGS="$ac_save_CXXFLAGS"
   AC_LANG_RESTORE
 ])
@@ -3028,15 +3031,15 @@ EOF
 dnl
 dnl Allow visibility attributes to be used on namespaces, objects, etc.
 dnl
-dnl --enable-visibility enables attempt to use visibility attributes.
-dnl --disable-visibility turns off all use of visibility attributes.
-dnl  +  Usage:  GLIBCXX_ENABLE_VISIBILITY[(DEFAULT)]
+dnl --enable-libstdcxx-visibility enables attempt to use visibility attributes.
+dnl --disable-libstdcxx-visibility turns off all use of visibility attributes.
+dnl  +  Usage:  GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY[(DEFAULT)]
 dnl       Where DEFAULT is 'yes'.
 dnl
-AC_DEFUN([GLIBCXX_ENABLE_VISIBILITY], [
-GLIBCXX_ENABLE(visibility,$1,,[enables visibility safe usage])
+AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY], [
+GLIBCXX_ENABLE(libstdcxx-visibility,$1,,[enables visibility safe usage])
 
-if test x$enable_visibility = xyes ; then
+if test x$enable_libstdcxx_visibility = xyes ; then
   dnl all hail libgfortran
   dnl Check whether the target supports hidden visibility.
   AC_CACHE_CHECK([whether the target supports hidden visibility],
@@ -3048,12 +3051,12 @@ if test x$enable_visibility = xyes ; then
                 glibcxx_cv_have_attribute_visibility=no)
   CFLAGS="$save_CFLAGS"])
   if test $glibcxx_cv_have_attribute_visibility = no; then
-    enable_visibility=no
+    enable_libstdcxx_visibility=no
   fi
 fi
 
-GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_visibility = yes)
-AC_MSG_NOTICE([visibility supported: $enable_visibility])
+GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_libstdcxx_visibility = yes)
+AC_MSG_NOTICE([visibility supported: $enable_libstdcxx_visibility])
 ])
 
 
@@ -3456,6 +3459,94 @@ AC_DEFUN([GLIBCXX_CHECK_SC_NPROCESSORS_ONLN], [
   AC_LANG_RESTORE
 ])
 
+dnl
+dnl Check whether sysconf(_SC_NPROC_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROC_ONLN.
+dnl
+AC_DEFUN([GLIBCXX_CHECK_SC_NPROC_ONLN], [
+
+  AC_LANG_SAVE
+  AC_LANG_CPLUSPLUS
+  ac_save_CXXFLAGS="$CXXFLAGS"
+  CXXFLAGS="$CXXFLAGS -fno-exceptions"
+
+  AC_MSG_CHECKING([for _SC_NPROC_ONLN])
+  AC_CACHE_VAL(glibcxx_cv_SC_NPROC_ONLN, [
+    GCC_TRY_COMPILE_OR_LINK(
+      [#include <unistd.h>],
+      [int n = sysconf(_SC_NPROC_ONLN);],
+      [glibcxx_cv_SC_NPROC_ONLN=yes],
+      [glibcxx_cv_SC_NPROC_ONLN=no])
+  ])
+  if test $glibcxx_cv_SC_NPROC_ONLN = yes; then
+    AC_DEFINE(_GLIBCXX_USE_SC_NPROC_ONLN, 1, [Define if _SC_NPROC_ONLN  is available in <unistd.h>.])
+  fi
+  AC_MSG_RESULT($glibcxx_cv_SC_NPROC_ONLN)
+
+  CXXFLAGS="$ac_save_CXXFLAGS"
+  AC_LANG_RESTORE
+])
+
+dnl
+dnl Check whether pthread_num_processors_np is available in <pthread.h>, and define _GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP.
+dnl
+AC_DEFUN([GLIBCXX_CHECK_PTHREADS_NUM_PROCESSORS_NP], [
+
+  AC_LANG_SAVE
+  AC_LANG_CPLUSPLUS
+  ac_save_CXXFLAGS="$CXXFLAGS"
+  CXXFLAGS="$CXXFLAGS -fno-exceptions"
+
+  AC_MSG_CHECKING([for pthreads_num_processors_np])
+  AC_CACHE_VAL(glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP, [
+    GCC_TRY_COMPILE_OR_LINK(
+      [#include <pthread.h>],
+      [int n = pthread_num_processors_np();],
+      [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=yes],
+      [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=no])
+  ])
+  if test $glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP = yes; then
+    AC_DEFINE(_GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP, 1, [Define if pthreads_num_processors_np is available in <pthread.h>.])
+  fi
+  AC_MSG_RESULT($glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP)
+
+  CXXFLAGS="$ac_save_CXXFLAGS"
+  AC_LANG_RESTORE
+])
+
+dnl
+dnl Check whether sysctl is available in <pthread.h>, and define _GLIBCXX_USE_SYSCTL_HW_NCPU.
+dnl
+AC_DEFUN([GLIBCXX_CHECK_SYSCTL_HW_NCPU], [
+
+  AC_LANG_SAVE
+  AC_LANG_CPLUSPLUS
+  ac_save_CXXFLAGS="$CXXFLAGS"
+  CXXFLAGS="$CXXFLAGS -fno-exceptions"
+
+  AC_MSG_CHECKING([for hw.ncpu sysctl])
+  AC_CACHE_VAL(glibcxx_cv_SYSCTL_HW_NCPU, [
+    GCC_TRY_COMPILE_OR_LINK(
+      [
+       #include <stddef.h>
+       #include <sys/sysctl.h>
+       ],
+      [
+       int count;
+       size_t size = sizeof(count);
+       int mib[] = { CTL_HW, HW_NCPU };
+       sysctl(mib, 2, &count, &size, NULL, 0);
+      ],
+      [glibcxx_cv_SYSCTL_HW_NCPU=yes],
+      [glibcxx_cv_SYSCTL_HW_NCPU=no])
+  ])
+  if test $glibcxx_cv_SYSCTL_HW_NCPU = yes; then
+    AC_DEFINE(_GLIBCXX_USE_SYSCTL_HW_NCPU, 1, [Define if sysctl(), CTL_HW and HW_NCPU are available in <sys/sysctl.h>.])
+  fi
+  AC_MSG_RESULT($glibcxx_cv_SYSCTL_HW_NCPU)
+
+  CXXFLAGS="$ac_save_CXXFLAGS"
+  AC_LANG_RESTORE
+])
 
 # Macros from the top-level gcc directory.
 m4_include([../config/gc++filt.m4])