From af5cd05de5dd38cf25d14ea4d30ae9b791d2420b Mon Sep 17 00:00:00 2001 From: Michael Ellerman Date: Thu, 7 Feb 2019 16:16:52 +1100 Subject: [PATCH] powerpc: Fix defconfig choice logic when cross compiling 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 --- arch/powerpc/Makefile | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile index a1b17bcd0b62..64b8a5ae3b75 100644 --- a/arch/powerpc/Makefile +++ b/arch/powerpc/Makefile @@ -34,11 +34,10 @@ ifdef CONFIG_PPC_BOOK3S_32 KBUILD_CFLAGS += -mcpu=powerpc endif -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 ifdef CONFIG_PPC64 new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi)