diff -udr work.origin/csw/asm.c work/csw/asm.c
--- csw/asm.c.orig	Mon Nov 22 23:18:14 1993
+++ csw/asm.c	Wed May 12 05:05:46 1999
@@ -8,7 +8,17 @@
 
 #include "../arch.h"
 
-#ifdef __svr4__		/* if SVR4 (including Solaris 2.x) */
+#ifdef __FreeBSD__
+#if __FreeBSD__ >= 2
+#include <osreldate.h>
+#if __FreeBSD_version >= 300004
+#define __elf__
+#endif
+#endif
+#endif
+
+	/* if SVR4 (including Solaris 2.x)  or FreeBSD-elf */
+#if defined(__svr4__) || defined (__elf__)
 #define SR_BUILD_CONTEXT	sr_build_context
 #define SR_CHG_CONTEXT		sr_chg_context
 #define SR_CHECK_STK		sr_check_stk