acinclude.m4 ([GLIBCXX_CHECK_GTHREADS]): New.

2008-08-28  Chris Fairles  <chris.fairles@gmail.com>

        * acinclude.m4 ([GLIBCXX_CHECK_GTHREADS]): New. Checks for gthread
	support used by c++0x thread library.
	* configure.ac: Test unconditionally.
	* configure: Regenerate.
	* config.h.in: Regenerate.

From-SVN: r139705

5 files changed, 150 insertions, 4 deletions

diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 43a027c..c9ca0a8 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,11 @@
+2008-08-28  Chris Fairles  <chris.fairles@gmail.com>
+
+        * acinclude.m4 ([GLIBCXX_CHECK_GTHREADS]): New. Checks for gthread
+	support used by c++0x thread library.
+	* configure.ac: Test unconditionally.
+	* configure: Regenerate.
+	* config.h.in: Regenerate.
+
 2008-08-27  Benjamin Kosnik  <bkoz@redhat.com>
 
 	* doc/Makefile.am: Edit xml file list.
diff --git a/libstdc++-v3/acinclude.m4 b/libstdc++-v3/acinclude.m4
index 8ea21ce..052515b 100644
--- a/libstdc++-v3/acinclude.m4
+++ b/libstdc++-v3/acinclude.m4
@@ -2816,6 +2816,45 @@ AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
 ])
 
 
+dnl
+dnl Check if gthread implementation defines the types and functions
+dnl required by the c++0x thread library.  Conforming gthread
+dnl implementations can define __GTHREADS_CXX0X to enable use with c++0x.
+dnl
+AC_DEFUN([GLIBCXX_CHECK_GTHREADS], [
+  AC_LANG_SAVE
+  AC_LANG_CPLUSPLUS
+
+  ac_save_CXXFLAGS="$CXXFLAGS"
+  CXXFLAGS="$CXXFLAGS -fno-exceptions -I${toplevel_srcdir}/gcc"
+
+  target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
+  case $target_thread_file in
+    posix)
+      CXXFLAGS="$CXXFLAGS -DSUPPORTS_WEAK -DGTHREAD_USE_WEAK -D_PTHREADS"
+  esac
+
+  AC_MSG_CHECKING([for gthreads library])
+
+  AC_TRY_COMPILE([#include "gthr.h"],
+    [
+     	#ifndef __GTHREADS_CXX0X
+	#error
+	#endif
+    ], [ac_has_gthreads=yes], [ac_has_gthreads=no])
+
+  AC_MSG_RESULT([$ac_has_gthreads])
+
+  if test x"$ac_has_gthreads" = x"yes"; then
+    AC_DEFINE(_GLIBCXX_HAS_GTHREADS, 1,
+              [Define if gthreads library is available.])
+  fi
+
+  CXXFLAGS="$ac_save_CXXFLAGS"
+  AC_LANG_RESTORE
+])
+
+
 # Check whether LC_MESSAGES is available in <locale.h>.
 # Ulrich Drepper <drepper@cygnus.com>, 1995.
 #
diff --git a/libstdc++-v3/config.h.in b/libstdc++-v3/config.h.in
index 0074772..91e6cb8 100644
--- a/libstdc++-v3/config.h.in
+++ b/libstdc++-v3/config.h.in
@@ -698,6 +698,9 @@
 /* Define if a fully dynamic basic_string is wanted. */
 #undef _GLIBCXX_FULLY_DYNAMIC_STRING
 
+/* Define if gthreads library is available. */
+#undef _GLIBCXX_HAS_GTHREADS
+
 /* Define to 1 if a full hosted library is built, or 0 if freestanding. */
 #undef _GLIBCXX_HOSTED
 
diff --git a/libstdc++-v3/configure b/libstdc++-v3/configure
index bbeb6f3..4287de5 100755
--- a/libstdc++-v3/configure
+++ b/libstdc++-v3/configure
@@ -14157,7 +14157,7 @@ _ACEOF
 
 
 
-# Checks for compiler support that don't require linking.
+# Checks for compiler support that doesn't require linking.
 
   # All these tests are for C++; save the language and the compiler flags.
   # The CXXFLAGS thing is suspicious, but based on similar bits previously
@@ -17363,7 +17363,7 @@ _ACEOF
   fi
 
 
-# Checks for operating systems support that don't require linking.
+# Checks for operating systems support that doesn't require linking.
 
 
 echo "$as_me:$LINENO: checking for EOWNERDEAD" >&5
@@ -21576,6 +21576,99 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 
 
+# For gthread support
+
+
+
+  ac_ext=cc
+ac_cpp='$CXXCPP $CPPFLAGS'
+ac_compile='$CXX -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
+
+
+  ac_save_CXXFLAGS="$CXXFLAGS"
+  CXXFLAGS="$CXXFLAGS -fno-exceptions -I${toplevel_srcdir}/gcc"
+
+  target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
+  case $target_thread_file in
+    posix)
+      CXXFLAGS="$CXXFLAGS -DSUPPORTS_WEAK -DGTHREAD_USE_WEAK -D_PTHREADS"
+  esac
+
+  echo "$as_me:$LINENO: checking for gthreads library" >&5
+echo $ECHO_N "checking for gthreads library... $ECHO_C" >&6
+
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include "gthr.h"
+int
+main ()
+{
+
+     	#ifndef __GTHREADS_CXX0X
+	#error
+	#endif
+
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_cxx_werror_flag"
+			 || test ! -s conftest.err'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest.$ac_objext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_has_gthreads=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_has_gthreads=no
+fi
+rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
+
+  echo "$as_me:$LINENO: result: $ac_has_gthreads" >&5
+echo "${ECHO_T}$ac_has_gthreads" >&6
+
+  if test x"$ac_has_gthreads" = x"yes"; then
+
+cat >>confdefs.h <<\_ACEOF
+#define _GLIBCXX_HAS_GTHREADS 1
+_ACEOF
+
+  fi
+
+  CXXFLAGS="$ac_save_CXXFLAGS"
+  ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+
+
 
   if test "${ac_cv_header_locale_h+set}" = set; then
   echo "$as_me:$LINENO: checking for locale.h" >&5
diff --git a/libstdc++-v3/configure.ac b/libstdc++-v3/configure.ac
index 5704b4b..ff388ab 100644
--- a/libstdc++-v3/configure.ac
+++ b/libstdc++-v3/configure.ac
@@ -100,7 +100,7 @@ GLIBCXX_ENABLE_PCH($is_hosted)
 GLIBCXX_ENABLE_ATOMIC_BUILTINS
 GLIBCXX_ENABLE_THREADS
 
-# Checks for compiler support that don't require linking.
+# Checks for compiler support that doesn't require linking.
 GLIBCXX_CHECK_COMPILER_FEATURES
 GLIBCXX_CHECK_STANDARD_LAYOUT
 
@@ -119,7 +119,7 @@ GLIBCXX_ENABLE_PARALLEL([yes])
 GLIBCXX_ENABLE_CXX_FLAGS
 GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING([no])
 
-# Checks for operating systems support that don't require linking.
+# Checks for operating systems support that doesn't require linking.
 GLIBCXX_CHECK_SYSTEM_ERROR
 
 # For the streamoff typedef.
@@ -150,6 +150,9 @@ GLIBCXX_CHECK_GETTIMEOFDAY
 # NB: The default is [no], because otherwise it requires linking.
 GLIBCXX_ENABLE_CLOCK_GETTIME([no])
 
+# For gthread support
+GLIBCXX_CHECK_GTHREADS
+
 AC_LC_MESSAGES
 
 # Check for available headers.