Messages in this thread Patch in this message | | | Date | Wed, 24 Nov 2004 08:22:05 -0800 | From | "H. Peter Anvin" <> | Subject | [PATCH] Allow compiling i386 with an x86-64 compiler |
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This patch adds -m32 if gcc supports it, thus making it easier to compile the i386 architecture with an x86-64 compiler.
Note that it adds the option to CC, since it also affects assembly code and linking. The extra level of indirection is because $(call cc-option) itself uses $(CC), so just doing CC += ... would cause $(CC) to be recursively defined.
-hpa
Signed-Off-By: H. Peter Anvin <hpa@zytor.com> Index: linux-2.5/arch/i386/Makefile =================================================================== RCS file: /home/hpa/kernel/bkcvs/linux-2.5/arch/i386/Makefile,v retrieving revision 1.72 diff -u -r1.72 Makefile --- linux-2.5/arch/i386/Makefile 27 Oct 2004 17:27:13 -0000 1.72 +++ linux-2.5/arch/i386/Makefile 23 Nov 2004 02:04:09 -0000 @@ -20,6 +20,10 @@ LDFLAGS_vmlinux := CHECKFLAGS += -D__i386__ +# This allows compilation with an x86-64 compiler +CC_M32 := $(call cc-option,-m32) +CC += $(CC_M32) + CFLAGS += -pipe -msoft-float # prevent gcc from keeping the stack 16 byte aligned | |