From: Tiago Maluta <tiago.maluta@xxxxxxxxx>
Linux has an recent option to define CROSS_COMPILE in menuconfig.
Typically, one of the options when building for another target is
('arm' is just an example):
# make ARCH=arm CROSS_COMPILE=arm-cc O=../build
If I omit CROSS_COMPILE and use the new way in .config:
CONFIG_CROSS_COMPILE="arm-cc"
I got:
cc1: error: unrecognized command line option "-mlittle-endian"
cc1: error: unrecognized command line option "-mabi=aapcs-linux"
cc1: error: unrecognized command line option "-mno-thumb-interwork"
/usr/src/linux/kernel/bounds.c:1: error: bad value (armv5t) for -march= switch
/usr/src/linux/kernel/bounds.c:1: error: bad value (armv5t) for -mtune= switch
make[2]: *** [kernel/bounds.s] Error 1
make[1]: *** [prepare0] Error 2
make: *** [sub-make] Error 2
Verbose output clearly says that I'm using the host compiler instead cross
compiler. This patch fixed my problem.
Cc: Michal Marek <mmarek@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
Makefile | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN Makefile~kbuild-fix-config_cross_compile-issue-in-config Makefile
--- a/Makefile~kbuild-fix-config_cross_compile-issue-in-config
+++ a/Makefile
@@ -190,7 +190,7 @@ SUBARCH := $(shell uname -m | sed -e s/i
export KBUILD_BUILDHOST := $(SUBARCH)
ARCH ?= $(SUBARCH)
CROSS_COMPILE ?=
-CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%)
+CROSS_COMPILE := $(shell grep CONFIG_CROSS_COMPILE .config | cut -d'"' -f2)
# Architecture as present in compile.h
UTS_MACHINE := $(ARCH)
_
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