From: Michael Ellerman mpe@ellerman.id.au
commit af5cd05de5dd38cf25d14ea4d30ae9b791d2420b upstream.
Our logic for choosing defconfig doesn't work well in some situations.
For example if you're on a ppc64le machine but you specify a non-empty CROSS_COMPILE, in order to use a non-default toolchain, then defconfig will give you ppc64_defconfig (big endian):
$ make CROSS_COMPILE=~/toolchains/gcc-8/bin/powerpc-linux- defconfig *** Default configuration is based on 'ppc64_defconfig'
This is because we assume that CROSS_COMPILE being set means we can't be on a ppc machine and rather than checking we just default to ppc64_defconfig.
We should just ignore CROSS_COMPILE, instead check the machine with uname and if it's one of ppc, ppc64 or ppc64le then use that defconfig. If it's none of those then we fall back to ppc64_defconfig.
Signed-off-by: Michael Ellerman mpe@ellerman.id.au Signed-off-by: Alyssa Ross hi@alyssa.is Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/powerpc/Makefile | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-)
--- a/arch/powerpc/Makefile +++ b/arch/powerpc/Makefile @@ -29,11 +29,10 @@ endif
export CROSS32CC CROSS32AR
-ifeq ($(CROSS_COMPILE),) -KBUILD_DEFCONFIG := $(shell uname -m)_defconfig -else -KBUILD_DEFCONFIG := ppc64_defconfig -endif +# If we're on a ppc/ppc64/ppc64le machine use that defconfig, otherwise just use +# ppc64_defconfig because we have nothing better to go on. +uname := $(shell uname -m) +KBUILD_DEFCONFIG := $(if $(filter ppc%,$(uname)),$(uname),ppc64)_defconfig
ifeq ($(CONFIG_PPC64),y) new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi)