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[PATCH] uml: fix biarch gcc build on x86_64

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I run an x86_64 kernel with i386 userspace (Ubuntu Dapper) and decided to try
out UML today.  I found that UML wasn't quite aware of biarch compilers (which
Ubuntu i386 ships).  A fix similar to what was done for x86_64 should probably
be committed (see
http://marc.theaimsgroup.com/?l=linux-kernel&m=113425940204010&w=2).  Without
the FLAGS changes, the build will fail at a number of places and without the
LINK change, the final link will fail.

Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Cc: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Jeff Dike 2006-06-30 01:55:58 -07:00 committed by Linus Torvalds
parent d115ec0f0f
commit ff23db5373
2 changed files with 7 additions and 2 deletions
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7
arch/um/Makefile-x86_64
View file

@ -6,9 +6,11 @@ START := 0x60000000
#We #undef __x86_64__ for kernelspace, not for userspace where
#it's needed for headers to work!
CFLAGS += -U__$(SUBARCH)__ -fno-builtin
USER_CFLAGS += -fno-builtin
CFLAGS += -U__$(SUBARCH)__ -fno-builtin -m64
USER_CFLAGS += -fno-builtin -m64
CHECKFLAGS += -m64
AFLAGS += -m64
LDFLAGS += -m elf_x86_64
ELF_ARCH := i386:x86-64
ELF_FORMAT := elf64-x86-64
@ -16,3 +18,4 @@ ELF_FORMAT := elf64-x86-64
# Not on all 64-bit distros /lib is a symlink to /lib64. PLD is an example.
LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib64
LINK-y += -m64

2
arch/um/kernel/vmlinux.lds.S
View file

@ -1,4 +1,6 @@
#include <linux/config.h>
/* in case the preprocessor is a 32bit one */
#undef i386
#ifdef CONFIG_LD_SCRIPT_STATIC
#include "uml.lds.S"
#else