[PATCH] biarch compiler support for i386

[PATCH] biarch compiler support for i386

[H. Peter Anvin]

[-- Attachment #1: Type: text/plain, Size: 267 bytes --]

This allows the i386 architecture to be built on a system with a biarch 
compiler that defaults to x86-64, merely by specifying ARCH=i386.

As previously discussed, this uses the equivalent logic to the ppc port.

	-hpa

Signed-Off-By: H. Peter Anvin <hpa@zytor.com>

[-- Attachment #2: i386-biarch.patch --]
[-- Type: text/x-patch, Size: 738 bytes --]

Index: linux-2.5/arch/i386/Makefile
===================================================================
RCS file: /home/hpa/kernel/bkcvs/linux-2.5/arch/i386/Makefile,v
retrieving revision 1.75
diff -u -r1.75 Makefile
--- linux-2.5/arch/i386/Makefile	12 Mar 2005 22:03:27 -0000	1.75
+++ linux-2.5/arch/i386/Makefile	5 Apr 2005 05:29:20 -0000
@@ -17,6 +17,13 @@
 #           Kianusch Sayah Karadji <kianusch@sk-tech.net>
 #           Added support for GEODE CPU
 
+HAS_BIARCH      := $(call cc-option-yn, -m32)
+ifeq ($(HAS_BIARCH),y)
+AS              := $(AS) --32
+LD              := $(LD) -m elf_i386
+CC              := $(CC) -m32
+endif
+
 LDFLAGS		:= -m elf_i386
 OBJCOPYFLAGS	:= -O binary -R .note -R .comment -S
 LDFLAGS_vmlinux :=

Re: [PATCH] biarch compiler support for i386

[Christoph Hellwig]

On Mon, Apr 04, 2005 at 11:14:16PM -0700, H. Peter Anvin wrote:
> This allows the i386 architecture to be built on a system with a biarch 
> compiler that defaults to x86-64, merely by specifying ARCH=i386.
> 
> As previously discussed, this uses the equivalent logic to the ppc port.

Given that the same logic applies to various other ports maybe it should
go into a common Makefile fragment?

Re: [PATCH] biarch compiler support for i386

[H. Peter Anvin]

Christoph Hellwig wrote:
> Given that the same logic applies to various other ports maybe it should
> go into a common Makefile fragment?

Alas, the *details* are different for each architecture.

	-hpa