2008-04-10 Benjamin Kosnik <bkoz@redhat.com>

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

diff --git a/libstdc++-v3/configure b/libstdc++-v3/configure
index 9a6ec52..6e6e199 100755 (executable)
--- a/libstdc++-v3/configure
+++ b/libstdc++-v3/configure
@@ -17947,6 +17947,106 @@ _ACEOF
   fi
 
 
+
+  echo "$as_me:$LINENO: checking for ISO C++200x standard layout type support" >&5
+echo $ECHO_N "checking for ISO C++200x standard layout type support... $ECHO_C" >&6
+  if test "${ac_standard_layout+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+
+
+
+  ac_ext=cc
+ac_cpp='$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_test_CXXFLAGS="${CXXFLAGS+set}"
+  ac_save_CXXFLAGS="$CXXFLAGS"
+  CXXFLAGS='-std=gnu++0x'
+
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+struct b
+                  {
+                   bool t;
+
+                   // Need standard layout relaxation from POD
+                   private:
+                   b& operator=(const b&);
+                   b(const b&);
+                   };
+
+                   int main()
+                   {
+                     b tst1 = { false };
+                      return 0;
+                   }
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$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 $ac_status); }; }; then
+  ac_standard_layout=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_standard_layout=no
+fi
+rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
+
+  CXXFLAGS="$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
+
+
+fi
+
+  echo "$as_me:$LINENO: result: $ac_standard_layout" >&5
+echo "${ECHO_T}$ac_standard_layout" >&6
+  if test x"$ac_standard_layout" = x"yes"; then
+
+cat >>confdefs.h <<\_ACEOF
+#define _GLIBCXX_USE_STANDARD_LAYOUT 1
+_ACEOF
+
+  fi
+
+
 # No surprises, no surprises...
 
   echo "$as_me:$LINENO: checking for thread model used by GCC" >&5
@@ -17988,7 +18088,7 @@ ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
 
   # Fake what AC_TRY_COMPILE does.  XXX Look at redoing this new-style.
     cat > conftest.$ac_ext << EOF
-#line 17991 "configure"
+#line 18091 "configure"
 int main()
 {
   // NB: _Atomic_word not necessarily int.