diff --git a/Build.sh b/Build.sh
index c9d511f..aab5f63 100644
--- a/Build.sh
+++ b/Build.sh
@@ -1,5 +1,5 @@
 #!/bin/sh
-srcversion='$MirOS: src/bin/mksh/Build.sh,v 1.631 2013/05/05 13:38:00 tg Exp $'
+srcversion='$MirOS: src/bin/mksh/Build.sh,v 1.632 2013/05/08 11:16:17 tg Exp $'
 #-
 # Copyright (c) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,
 #		2011, 2012, 2013
@@ -190,6 +190,7 @@ ac_testn() {
 ac_ifcpp() {
 	expr=$1; shift
 	ac_testn "$@" <<-EOF
+		extern void thiswillneverbedefinedIhope(void);
 		int main(void) { return (
 		#$expr
 		    0
@@ -1290,6 +1291,7 @@ test $ct = pcc && phase=u
 #
 ac_test attribute_bounded '' 'for __attribute__((__bounded__))' <<-'EOF'
 	#if defined(__TenDRA__) || (defined(__GNUC__) && (__GNUC__ < 2))
+	extern void thiswillneverbedefinedIhope(void);
 	/* force a failure: TenDRA and gcc 1.42 have false positive here */
 	int main(void) { return (thiswillneverbedefinedIhope()); }
 	#else
@@ -1310,6 +1312,7 @@ ac_test attribute_bounded '' 'for __attribute__((__bounded__))' <<-'EOF'
 EOF
 ac_test attribute_format '' 'for __attribute__((__format__))' <<-'EOF'
 	#if defined(__TenDRA__) || (defined(__GNUC__) && (__GNUC__ < 2))
+	extern void thiswillneverbedefinedIhope(void);
 	/* force a failure: TenDRA and gcc 1.42 have false positive here */
 	int main(void) { return (thiswillneverbedefinedIhope()); }
 	#else
@@ -1324,6 +1327,7 @@ ac_test attribute_format '' 'for __attribute__((__format__))' <<-'EOF'
 EOF
 ac_test attribute_noreturn '' 'for __attribute__((__noreturn__))' <<-'EOF'
 	#if defined(__TenDRA__) || (defined(__GNUC__) && (__GNUC__ < 2))
+	extern void thiswillneverbedefinedIhope(void);
 	/* force a failure: TenDRA and gcc 1.42 have false positive here */
 	int main(void) { return (thiswillneverbedefinedIhope()); }
 	#else
@@ -1336,6 +1340,7 @@ ac_test attribute_noreturn '' 'for __attribute__((__noreturn__))' <<-'EOF'
 EOF
 ac_test attribute_unused '' 'for __attribute__((__unused__))' <<-'EOF'
 	#if defined(__TenDRA__) || (defined(__GNUC__) && (__GNUC__ < 2))
+	extern void thiswillneverbedefinedIhope(void);
 	/* force a failure: TenDRA and gcc 1.42 have false positive here */
 	int main(void) { return (thiswillneverbedefinedIhope()); }
 	#else
@@ -1345,6 +1350,7 @@ ac_test attribute_unused '' 'for __attribute__((__unused__))' <<-'EOF'
 EOF
 ac_test attribute_used '' 'for __attribute__((__used__))' <<-'EOF'
 	#if defined(__TenDRA__) || (defined(__GNUC__) && (__GNUC__ < 2))
+	extern void thiswillneverbedefinedIhope(void);
 	/* force a failure: TenDRA and gcc 1.42 have false positive here */
 	int main(void) { return (thiswillneverbedefinedIhope()); }
 	#else
@@ -1531,7 +1537,7 @@ else
 		#define EXTERN
 		#define MKSH_INCLUDES_ONLY
 		#include "sh.h"
-		__RCSID("$MirOS: src/bin/mksh/Build.sh,v 1.631 2013/05/05 13:38:00 tg Exp $");
+		__RCSID("$MirOS: src/bin/mksh/Build.sh,v 1.632 2013/05/08 11:16:17 tg Exp $");
 		int main(void) { printf("Hello, World!\n"); return (0); }
 EOF
 	case $cm in
diff --git a/sh.h b/sh.h
index 569d33b..1fa935f 100644
--- a/sh.h
+++ b/sh.h
@@ -164,7 +164,7 @@
 #endif
 
 #ifdef EXTERN
-__RCSID("$MirOS: src/bin/mksh/sh.h,v 1.654 2013/05/02 21:59:52 tg Exp $");
+__RCSID("$MirOS: src/bin/mksh/sh.h,v 1.655 2013/05/08 11:16:19 tg Exp $");
 #endif
 #define MKSH_VERSION "R46 2013/05/02"
 
@@ -522,6 +522,7 @@ char *ucstrstr(char *, const char *);
 
 #if (!defined(MKSH_BUILDMAKEFILE4BSD) && !defined(MKSH_BUILDSH)) || (MKSH_BUILD_R != 461)
 #error Must run Build.sh to compile this.
+extern void thiswillneverbedefinedIhope(void);
 int
 im_sorry_dave(void)
 {