linux-kernel - [PATCH 04/19] powerpc: Refuse to build 64-bit with GCC-4.2.0 and CONFIG

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Message-ID: <20070603204527.GD9240@uranus.ravnborg.org>
Date:	Sun, 3 Jun 2007 22:45:27 +0200
From:	Sam Ravnborg <sam@...nborg.org>
To:	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	kbuild-devel@...ts.sourceforge.net
Subject: [PATCH 04/19] powerpc: Refuse to build 64-bit with GCC-4.2.0 and CONFIG_MODULES

Subject: [PATCH 04/19] powerpc: Refuse to build 64-bit with GCC-4.2.0 and CONFIG_MODULES
From: Segher Boessenkool <segher@...nel.crashing.org>
Date: Sat, 19 May 2007 18:49:08 +0200

...since this won't work (compiler bug, see <http://gcc.gnu.org/PR31490>).

Signed-off-by: Segher Boessenkool <segher@...nel.crashing.org>
Signed-off-by: Sam Ravnborg <sam@...nborg.org>
---
 arch/powerpc/Makefile |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
index 6238b58..1447c83 100644
--- a/arch/powerpc/Makefile
+++ b/arch/powerpc/Makefile
@@ -202,6 +202,14 @@ checkbin:
 			false; \
 		fi ; \
 	fi
+	@if test "$(call cc-fullversion)" = "040200" \
+	    && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \
+		echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \
+		echo 'kernel with modules enabled.' ; \
+		echo -n '*** Please use a different GCC version or ' ; \
+		echo 'disable kernel modules' ; \
+		false ; \
+	fi
 	@if ! /bin/echo dssall | $(AS) -many -o $(TOUT) >/dev/null 2>&1 ; then \
 		echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build ' ; \
 		echo 'correctly with old versions of binutils.' ; \
-- 
1.5.1.rc3.1544.g8a923


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