2008-04-14  Benjamin Kosnik  <bkoz@redhat.com>

	    PR libstdc++/35816
	    * acinclude.m4 (GLIBCXX_ENABLE_ATOMIC_BUILTINS): Set CXXFLAGS to
	    -O0 when checking for atomic builtins.
	    * configure: Regenerate.

Index: acinclude.m4
===================================================================
--- acinclude.m4	(revision 134289)
+++ acinclude.m4	(working copy)
@@ -2292,7 +2292,7 @@
 }
 EOF
     old_CXXFLAGS="$CXXFLAGS"
-    CXXFLAGS=-S
+    CXXFLAGS="-O0 -S"
     if AC_TRY_EVAL(ac_compile); then
       if grep __sync_fetch_and_add conftest.s >/dev/null 2>&1 ; then
         enable_atomic_builtins=no