From bec2c48c2045ca467d07bba54783318b8672bda7 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Tue, 23 Oct 2007 22:37:23 +0200 Subject: x86: Add BITS to allow simple Makefile sharing 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 Signed-off-by: Ingo Molnar diff --git a/arch/i386/Makefile b/arch/i386/Makefile index b81cb64..f5b9a37 100644 --- a/arch/i386/Makefile +++ b/arch/i386/Makefile @@ -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 := $(AS) --32 diff --git a/arch/x86_64/Makefile b/arch/x86_64/Makefile index 6d89ab7..20eb69b 100644 --- a/arch/x86_64/Makefile +++ b/arch/x86_64/Makefile @@ -24,6 +24,12 @@ # Fill in SRCARCH SRCARCH := x86 +# BITS is used as extension for files which are available in a 32 bit +# and a 64 bit version to simplify shared Makefiles. +# e.g.: obj-y += foo_$(BITS).o +BITS := 64 +export BITS + LDFLAGS := -m elf_x86_64 OBJCOPYFLAGS := -O binary -R .note -R .comment -S LDFLAGS_vmlinux := -- cgit v0.10.2