re PR bootstrap/54820 (ada: cannot find -lstdc++ since 4.8.0 20121002)

	PR bootstrap/54820
	* configure.ac (have_static_libs): Force 'no' for GCC version < 4.5.
	* configure: Regenerate.

From-SVN: r192748

ChangeLog

+2012-10-23  Eric Botcazou  <ebotcazou@adacore.com>
+
+	PR bootstrap/54820
+	* configure.ac (have_static_libs): Force 'no' for GCC version < 4.5.
+	* configure: Regenerate.
+
 2012-10-23  Richard Earnshaw  <rearnsha@arm.com>
 
 	* MAINTAINERS (aarch64): Add Marcus and myself.

configure

@@ -4892,6 +4892,10 @@ ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
 
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
+
+#if (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 5)
+#error -static-libstdc++ not implemented
+#endif
 int main() {}
 _ACEOF
 if ac_fn_cxx_try_link "$LINENO"; then :

configure.ac

@@ -1190,7 +1190,11 @@ if test "$GCC" = yes; then
   LDFLAGS="$LDFLAGS -static-libstdc++ -static-libgcc"
   AC_MSG_CHECKING([whether g++ accepts -static-libstdc++ -static-libgcc])
   AC_LANG_PUSH(C++)
-  AC_LINK_IFELSE([int main() {}],
+  AC_LINK_IFELSE([
+#if (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 5)
+#error -static-libstdc++ not implemented
+#endif
+int main() {}],
     [AC_MSG_RESULT([yes]); have_static_libs=yes],
     [AC_MSG_RESULT([no])])
   AC_LANG_POP(C++)