path: root/arch/x86_64
diff options
authorThomas Gleixner <tglx@linutronix.de>2007-10-23 22:37:23 +0200
committerThomas Gleixner <tglx@linutronix.de>2007-10-23 22:37:23 +0200
commitbec2c48c2045ca467d07bba54783318b8672bda7 (patch)
tree69eb8e5051feb08235fd1a0cd7bba202e967e2e0 /arch/x86_64
parent428c5a2339f6d59e3b2d59e9b878b95e6f7a09d7 (diff)
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>
Diffstat (limited to 'arch/x86_64')
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/x86_64/Makefile b/arch/x86_64/Makefile
index 6d89ab762ffc..20eb69bd5a6d 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 :=