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x86: Add BITS to allow simple Makefile sharing

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Preperatory patch to simplify the sharing of Makefiles in
arch/x86.

Linus came up with this during a discussion about the ugliness of
ifeq($CONFIG_X86_32),y) and obj-$(CONFIG_X86_32) in the shared
Makefiles.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Thomas Gleixner 2007-10-23 22:37:23 +02:00
parent 428c5a2339
commit bec2c48c20
2 changed files with 12 additions and 0 deletions
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6
arch/i386/Makefile
View file

@ -20,6 +20,12 @@
# Fill in SRCARCH
SRCARCH := x86
# BITS is used as extension for files which are available in a 32 bit
# and a 64 bit version to simplify shared Makefiles.
# e.g.: obj-y += foo_$(BITS).o
BITS := 32
export BITS
HAS_BIARCH := $(call cc-option-yn, -m32)
ifeq ($(HAS_BIARCH),y)
AS := $(AS) --32

6
arch/x86_64/Makefile
View file

@ -24,6 +24,12 @@
# Fill in SRCARCH
SRCARCH := x86
# BITS is used as extension for files which are available in a 32 bit
# and a 64 bit version to simplify shared Makefiles.
# e.g.: obj-y += foo_$(BITS).o
BITS := 64
export BITS
LDFLAGS := -m elf_x86_64
OBJCOPYFLAGS := -O binary -R .note -R .comment -S
LDFLAGS_vmlinux :=