From: Thomas Gleixner <tglx@linutronix.de>
Date: Tue, 23 Oct 2007 20:37:23 +0000 (+0200)
Subject: x86: Add BITS to allow simple Makefile sharing
X-Git-Tag: v2.6.24-rc1~18^2~23
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bec2c48c2045ca467d07bba54783318b8672bda7;p=linux-2.6

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 <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

diff --git a/arch/i386/Makefile b/arch/i386/Makefile
index b81cb64d48..f5b9a37def 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 6d89ab762f..20eb69bd5a 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 :=