--- libstdc++/config/openbsd.mt.orig	Mon Mar 29 22:33:00 1999
+++ libstdc++/config/openbsd.mt	Mon Mar 29 22:33:10 1999
@@ -1,3 +1,3 @@
 # tell we want the mt-safe version
-MT_CFLAGS = -D_IO_MTSAFE_IO -D_PTHREADS
+MT_CFLAGS = -D_IO_MTSAFE_IO -D_PTHREADS -pthread