$OpenBSD: patch-config_h_in,v 1.2 2011/04/26 18:50:46 shadchin Exp $
--- config.h.in.orig	Mon Aug  9 18:30:50 2010
+++ config.h.in	Thu Mar  3 21:36:48 2011
@@ -558,7 +558,9 @@
        #pragma alloca
 #  else
 #    ifndef alloca /* predefined by HP cc +Olibcalls */
+#	ifndef __OpenBSD__
 	 char *alloca ();
+#	endif
 #    endif
 #  endif
 #endif
