diff --git a/external/lgpl2/mpc/lib/libmpc/Makefile b/external/lgpl2/mpc/lib/libmpc/Makefile
index 48003b7b4ac9..3bb5c8731d12 100644
--- a/external/lgpl2/mpc/lib/libmpc/Makefile
+++ b/external/lgpl2/mpc/lib/libmpc/Makefile
@@ -1,9 +1,12 @@
-#	$NetBSD: Makefile,v 1.2 2011/06/23 04:39:24 mrg Exp $
+#	$NetBSD: Makefile,v 1.3 2011/07/06 19:52:05 drochner Exp $
 
 .include <bsd.init.mk>
 
 LIB=	mpc
 
+LIBDPLIBS+= gmp ${.CURDIR}/../../../../lgpl3/gmp/lib/libgmp
+LIBDPLIBS+= mpfr ${.CURDIR}/../../../../lgpl3/mpfr/lib/libmpfr
+
 SRCS=	\
 	abs.c \
 	acos.c \
diff --git a/external/lgpl3/gmp/lib/libgmp/arch/i386/Makefile.inc b/external/lgpl3/gmp/lib/libgmp/arch/i386/Makefile.inc
index 41a2c9ad2386..ec420f62e0ad 100644
--- a/external/lgpl3/gmp/lib/libgmp/arch/i386/Makefile.inc
+++ b/external/lgpl3/gmp/lib/libgmp/arch/i386/Makefile.inc
@@ -1,4 +1,4 @@
-#	$NetBSD: Makefile.inc,v 1.3 2011/07/03 06:43:16 mrg Exp $
+#	$NetBSD: Makefile.inc,v 1.4 2011/07/06 19:52:06 drochner Exp $
 
 SRCS+= \
 	random.c \
@@ -180,7 +180,12 @@ CLEANFILES+=	trialdivtab.h
 dummy:
 	mkdir dummy
 ${.OBJDIR}/config.m4: ${.CURDIR}/arch/${MACHINE_ARCH}/config.m4
-	cp ${.CURDIR}/arch/${MACHINE_ARCH}/config.m4 ${.TARGET}
+	cp ${.CURDIR}/arch/${MACHINE_ARCH}/config.m4 ${.OBJDIR}/config.m4
+
+CLEANFILES+=	config.m4
+clean: cleandummy
+cleandummy: .PHONY
+	rmdir dummy
 
 .for _build _src in ${ASM_SRCS_LIST}
 ${_build:R}.s: Makefile dummy ${.OBJDIR}/config.m4
diff --git a/external/lgpl3/mpfr/lib/libmpfr/Makefile b/external/lgpl3/mpfr/lib/libmpfr/Makefile
index dbc5f5f75ad9..e522dff085c6 100644
--- a/external/lgpl3/mpfr/lib/libmpfr/Makefile
+++ b/external/lgpl3/mpfr/lib/libmpfr/Makefile
@@ -1,4 +1,4 @@
-#	$NetBSD: Makefile,v 1.5 2011/07/04 12:38:29 mrg Exp $
+#	$NetBSD: Makefile,v 1.6 2011/07/06 19:52:06 drochner Exp $
 
 .include <bsd.init.mk>
 
@@ -7,6 +7,8 @@ MKLINT=no
 
 LIB=	mpfr
 
+LIBDPLIBS+= gmp ${.CURDIR}/../../../gmp/lib/libgmp
+
 SRCS=	\
 	abort_prec_max.c \
 	acos.c \
@@ -504,6 +506,7 @@ mparam.h: mparam_h.in
 	cp ${.ALLSRC} ${.TARGET}
 
 ${SRCS}: mparam.h
+CLEANFILES+= mparam.h
 
 .PATH: ${.CURDIR}/../../dist