Backported from mainline

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

diff --git a/libstdc++-v3/acinclude.m4 b/libstdc++-v3/acinclude.m4
index b832527..87d3b8a 100644 (file)
--- a/libstdc++-v3/acinclude.m4
+++ b/libstdc++-v3/acinclude.m4
@@ -1132,6 +1132,11 @@ dnl --enable-libstdcxx-time=no
 dnl --disable-libstdcxx-time
 dnl        disables the checks completely
 dnl
+dnl N.B. Darwin provides nanosleep but doesn't support the whole POSIX
+dnl Timers option, so doesn't define _POSIX_TIMERS. Because the test
+dnl below fails Darwin unconditionally defines _GLIBCXX_USE_NANOSLEEP in
+dnl os_defines.h and also defines _GLIBCXX_USE_SCHED_YIELD.
+dnl
 AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_TIME], [
 
   AC_MSG_CHECKING([for clock_gettime, nanosleep and sched_yield])
@@ -1809,6 +1814,35 @@ AC_DEFUN([GLIBCXX_CHECK_STDLIB_PROTO], [
 ])
 
 dnl
+dnl Check whether required C++ overloads are present in <stdio.h>.
+dnl
+AC_DEFUN([GLIBCXX_CHECK_STDIO_PROTO], [
+
+  AC_LANG_SAVE
+  AC_LANG_CPLUSPLUS
+
+  AC_MSG_CHECKING([for gets declaration])
+  AC_CACHE_VAL(glibcxx_cv_gets, [
+  AC_COMPILE_IFELSE([AC_LANG_SOURCE(
+         [#include <stdio.h>
+          namespace test 
+          {
+              using ::gets;
+          }
+       ])],
+       [glibcxx_cv_gets=yes],
+       [glibcxx_cv_gets=no]
+      )])
+
+  if test $glibcxx_cv_gets = yes; then
+    AC_DEFINE(HAVE_GETS, 1, [Define if gets is available in <stdio.h>.])
+  fi
+  AC_MSG_RESULT($glibcxx_cv_gets)
+
+  AC_LANG_RESTORE
+])
+
+dnl
 dnl Check whether macros, etc are present for <system_error>
 dnl
 AC_DEFUN([GLIBCXX_CHECK_SYSTEM_ERROR], [
@@ -2926,11 +2960,10 @@ EOF
   CXXFLAGS="$old_CXXFLAGS"
   AC_LANG_RESTORE
 
-  # Set atomicity_dir to builtins if all of above tests pass.
+  # Set atomicity_dir to builtins if all but the long long test above passes.
   if test $glibcxx_cv_atomic_bool = yes \
      && test $glibcxx_cv_atomic_short = yes \
-     && test $glibcxx_cv_atomic_int = yes \
-     && test $glibcxx_cv_atomic_long_long = yes ; then
+     && test $glibcxx_cv_atomic_int = yes; then
     AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS, 1,
     [Define if the compiler supports C++11 atomics.])
     atomicity_dir=cpu/generic/atomicity_builtins
@@ -3264,17 +3297,14 @@ if test $enable_symvers != no ; then
      # The Solaris 2 runtime linker doesn't support the GNU extension of
      # binding the same symbol to different versions
      solaris2*)
-       symvers_renaming=no  ;;
+       ;;
      # Other platforms with GNU symbol versioning (GNU/Linux, more?) do.
      *)
        AC_DEFINE(HAVE_SYMVER_SYMBOL_RENAMING_RUNTIME_SUPPORT, 1,
         [Define to 1 if the target runtime linker supports binding the same symbol to different versions.])
-       symvers_renaming=yes  ;;
+       ;;
     esac
-else
-    symvers_renaming=no
 fi
-GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_SOL2, test $symvers_renaming = no)
 
 # Now, set up compatibility support, if any.
 # In addition, need this to deal with std::size_t mangling in