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authorJoonsoo Kim <iamjoonsoo.kim@lge.com>2013-06-19 10:02:29 +0900
committerArnaldo Carvalho de Melo <acme@redhat.com>2013-07-08 17:36:17 -0300
commit079787f209416416383c74ea5d5044be2d586f5e (patch)
tree17847ff50d6560fc66136cae8b6dd7dfeb2cc6f7
parent756bbc84e30b57ca1010b550ea30594fd0b0494f (diff)
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tools lib lk: Fix for cross build
Currently, lib lk doesn't use CROSS_COMPILE environment variable, so cross build always fails. This is a quick fix for this problem. Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1371603750-15053-2-git-send-email-iamjoonsoo.kim@lge.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
-rw-r--r--tools/lib/lk/Makefile15
1 files changed, 15 insertions, 0 deletions
diff --git a/tools/lib/lk/Makefile b/tools/lib/lk/Makefile
index 2c5a19733357..f0ecc0a13300 100644
--- a/tools/lib/lk/Makefile
+++ b/tools/lib/lk/Makefile
@@ -3,6 +3,21 @@ include ../../scripts/Makefile.include
CC = $(CROSS_COMPILE)gcc
AR = $(CROSS_COMPILE)ar
+# Makefiles suck: This macro sets a default value of $(2) for the
+# variable named by $(1), unless the variable has been set by
+# environment or command line. This is necessary for CC and AR
+# because make sets default values, so the simpler ?= approach
+# won't work as expected.
+define allow-override
+ $(if $(or $(findstring environment,$(origin $(1))),\
+ $(findstring command line,$(origin $(1)))),,\
+ $(eval $(1) = $(2)))
+endef
+
+# Allow setting CC and AR, or setting CROSS_COMPILE as a prefix.
+$(call allow-override,CC,$(CROSS_COMPILE)gcc)
+$(call allow-override,AR,$(CROSS_COMPILE)ar)
+
# guard against environment variables
LIB_H=
LIB_OBJS=
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