diff -Naur gcc-2.95.3/libstdc++/stl/stl_config.h gcc-2.95.3-pldas2/libstdc++/stl/stl_config.h
--- gcc-2.95.3/libstdc++/stl/stl_config.h	Mon May 17 16:03:48 1999
+++ gcc-2.95.3-pldas2/libstdc++/stl/stl_config.h	Tue Sep 12 12:46:28 2000
@@ -86,6 +86,9 @@
 // * _PTHREADS: if defined, use Posix threads for multithreading support.
 // * _NOTHREADS: if defined, don't use any multithreading support.
 
+#ifndef __USE_MALLOC
+#define __USE_MALLOC
+#endif
 
 // Other macros defined by this file: