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authorPaolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>2005-07-14 00:33:43 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2005-07-14 09:00:25 -0700
commit20d0021394c1b070bf04b22c5bc8fdb437edd4c5 (patch)
tree283d0cd3bfdaec49ed2b29d568f5ceca5e3f1d2a /arch/um/Makefile-x86_64
parentecc354a90af90a80dcaccc750f5f3e5e7c83112d (diff)
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[PATCH] uml: allow building as 32-bit binary on 64bit host
This patch makes the command: make ARCH=um SUBARCH=i386 work on x86_64 hosts (with support for building 32-bit binaries). This is especially needed since 64-bit UMLs don't support 32-bit emulation for guest binaries, currently. This has been tested in all possible cases and works. Only exception is that I've built but not tested a 64-bit binary, because I hadn't a 64-bit filesystem available. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/um/Makefile-x86_64')
-rw-r--r--arch/um/Makefile-x86_646
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/um/Makefile-x86_64 b/arch/um/Makefile-x86_64
index d80bd0052e6b..aa2f7174ebca 100644
--- a/arch/um/Makefile-x86_64
+++ b/arch/um/Makefile-x86_64
@@ -1,11 +1,13 @@
# Copyright 2003 - 2004 Pathscale, Inc
# Released under the GPL
-SUBARCH_LIBS := arch/um/sys-x86_64/
+libs-y += arch/um/sys-x86_64/
START := 0x60000000
+#We #undef __x86_64__ for kernelspace, not for userspace where
+#it's needed for headers to work!
CFLAGS += -U__$(SUBARCH)__ -fno-builtin $(STUB_CFLAGS)
-ARCH_USER_CFLAGS := -D__x86_64__
+USER_CFLAGS += -fno-builtin
ELF_ARCH := i386:x86-64
ELF_FORMAT := elf64-x86-64
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