Fix boot code head.S warning From: Paolo 'Blaisorblade' Giarrusso When compiling a 64-bit kernel on an Ubuntu 6.06 32bit system (whose GCC is also a cross-compiler for x86_64) I've seen that head.o is compiled as a 64-bit file (while it should not) and ld complaining about this during linking: [AK: it happens on all systems with new binutils] ld: warning: i386:x86-64 architecture of input file `arch/x86_64/boot/compressed/head.o' is incompatible with i386 output I've verified that removing -m64 from compilation flags to turn "-m64 -traditional -m32" into "-traditional -m32" fixes the issue. Signed-off-by: Paolo 'Blaisorblade' Giarrusso Signed-off-by: Andi Kleen --- arch/x86_64/boot/compressed/Makefile | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) Index: linux/arch/x86_64/boot/compressed/Makefile =================================================================== --- linux.orig/arch/x86_64/boot/compressed/Makefile +++ linux/arch/x86_64/boot/compressed/Makefile @@ -7,7 +7,8 @@ # targets := vmlinux vmlinux.bin vmlinux.bin.gz head.o misc.o piggy.o -EXTRA_AFLAGS := -traditional -m32 +EXTRA_AFLAGS := -traditional +AFLAGS := $(subst -m64,-m32,$(AFLAGS)) # cannot use EXTRA_CFLAGS because base CFLAGS contains -mkernel which conflicts with # -m32