diff --git a/external/lgpl3/gmp/lib/libgmp/Makefile b/external/lgpl3/gmp/lib/libgmp/Makefile
index 973716ced8e9..a7407e240162 100644
--- a/external/lgpl3/gmp/lib/libgmp/Makefile
+++ b/external/lgpl3/gmp/lib/libgmp/Makefile
@@ -1,4 +1,4 @@
-#	$NetBSD: Makefile,v 1.8 2011/07/04 12:00:15 mrg Exp $
+#	$NetBSD: Makefile,v 1.9 2011/07/18 16:55:49 tron Exp $
 
 .include <bsd.init.mk>
 
@@ -121,7 +121,6 @@ SRCS+=	tal-reent.c
 # these are generated
 SRCS+=	fib_table.c mp_bases.c
 
-
 # Build the files that may have multiple identical base names under
 # different names.
 .for _dir _srcfile in \
@@ -189,3 +188,9 @@ LIBGMP_MACHINE_ARCH?=${MACHINE_ARCH}
 	${.CURDIR}/arch/${LIBGMP_MACHINE_ARCH} \
 	${DIST}/mpf \
 	${DIST}/mpz
+
+# Don't warn about functions which cannot be stack smash protected as
+# there are a lot of them.
+.if defined(HAVE_GCC) || defined(HAVE_PCC)
+COPTS += -Wno-stack-protector
+.endif
diff --git a/external/lgpl3/mpfr/lib/libmpfr/Makefile b/external/lgpl3/mpfr/lib/libmpfr/Makefile
index e522dff085c6..d002b4ffb724 100644
--- a/external/lgpl3/mpfr/lib/libmpfr/Makefile
+++ b/external/lgpl3/mpfr/lib/libmpfr/Makefile
@@ -1,4 +1,4 @@
-#	$NetBSD: Makefile,v 1.6 2011/07/06 19:52:06 drochner Exp $
+#	$NetBSD: Makefile,v 1.7 2011/07/18 17:01:04 tron Exp $
 
 .include <bsd.init.mk>
 
@@ -513,3 +513,9 @@ CLEANFILES+= mparam.h
 .if ${LIBMPFR_MACHINE_ARCH} == "vax"
 COPTS.set_ld.c+=	-Wno-error
 .endif
+
+# Don't warn about functions which cannot be stack smash protected as
+# there are a lot of them.
+.if defined(HAVE_GCC) || defined(HAVE_PCC)
+COPTS += -Wno-stack-protector
+.endif