Commit ff23db53 authored by Jeff Dike's avatar Jeff Dike Committed by Linus Torvalds
Browse files

[PATCH] uml: fix biarch gcc build on x86_64

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

).  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: default avatarNishanth Aravamudan <>
Cc: Paolo 'Blaisorblade' Giarrusso <>
Cc: Sam Ravnborg <>
Signed-off-by: default avatarAndrew Morton <>
Signed-off-by: default avatarLinus Torvalds <>
parent d115ec0f
......@@ -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
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
#include <linux/config.h>
/* in case the preprocessor is a 32bit one */
#undef i386
#include ""
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