c++config: Revert _GLIBCXX_LONG_DOUBLE_COMPAT change.

2008-05-01  Benjamin Kosnik  <bkoz@redhat.com>

	* include/bits/c++config: Revert _GLIBCXX_LONG_DOUBLE_COMPAT change.

From-SVN: r134883

libstdc++-v3/ChangeLog

+2008-05-01  Benjamin Kosnik  <bkoz@redhat.com>
+
+	* include/bits/c++config: Revert _GLIBCXX_LONG_DOUBLE_COMPAT change.
+
 2008-04-30  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>
 
 	* include/Makefile.am (install-headers): Cope with empty

libstdc++-v3/include/bits/c++config

@@ -212,12 +212,11 @@ namespace std
 
 // XXX GLIBCXX_ABI Deprecated
 // Define if compatibility should be provided for -mlong-double-64
-#if defined __cplusplus && defined __LONG_DOUBLE_128__ 
 #undef _GLIBCXX_LONG_DOUBLE_COMPAT
-#endif
 
 // Namespace associations for long double 128 mode.
-#ifdef _GLIBCXX_LONG_DOUBLE_COMPAT
+#if defined _GLIBCXX_LONG_DOUBLE_COMPAT && defined __LONG_DOUBLE_128__ \
+  && defined __cplusplus
 namespace std
 {
   inline namespace __gnu_cxx_ldbl128 { }