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Message-Id: <1373483963-19277-7-git-send-email-acme@infradead.org> Date: Wed, 10 Jul 2013 16:19:06 -0300 From: Arnaldo Carvalho de Melo <acme@...radead.org> To: Ingo Molnar <mingo@...e.hu> Cc: linux-kernel@...r.kernel.org, Joonsoo Kim <iamjoonsoo.kim@....com>, Ingo Molnar <mingo@...hat.com>, Namhyung Kim <namhyung@...nel.org>, Paul Mackerras <paulus@...ba.org>, Peter Zijlstra <a.p.zijlstra@...llo.nl>, Arnaldo Carvalho de Melo <acme@...hat.com> Subject: [PATCH 06/23] tools lib lk: Fix for cross build From: Joonsoo Kim <iamjoonsoo.kim@....com> 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@....com> Cc: Ingo Molnar <mingo@...hat.com> Cc: Namhyung Kim <namhyung@...nel.org> Cc: Paul Mackerras <paulus@...ba.org> Cc: Peter Zijlstra <a.p.zijlstra@...llo.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@...hat.com> --- tools/lib/lk/Makefile | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/tools/lib/lk/Makefile b/tools/lib/lk/Makefile index 2c5a197..f0ecc0a 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= -- 1.8.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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