From 402928b58ec62b42b11992a7b51ff2f56ed65a18 Mon Sep 17 00:00:00 2001 From: Michael Ellerman Date: Wed, 6 Dec 2023 22:55:48 +1100 Subject: [PATCH] powerpc/Makefile: Auto detect cross compiler If no cross compiler is specified, try to auto detect one. Look for various combinations, matching: powerpc(64(le)?)?(-unknown)?-linux(-gnu)?- There are more possibilities, but the above is known to find a compiler on Fedora and Ubuntu (which use linux-gnu-), and also detects the kernel.org cross compilers (which use linux-). This allows cross compiling with simply: # Ubuntu $ sudo apt install gcc-powerpc-linux-gnu # Fedora $ sudo dnf install gcc-powerpc64-linux-gnu $ make ARCH=powerpc defconfig $ make ARCH=powerpc -j 4 Inspired by arch/parisc/Makefile. Acked-by: Segher Boessenkool Signed-off-by: Michael Ellerman Link: https://msgid.link/20231206115548.1466874-4-mpe@ellerman.id.au --- arch/powerpc/Makefile | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile index 48c06f5a0dc1d..051247027da0b 100644 --- a/arch/powerpc/Makefile +++ b/arch/powerpc/Makefile @@ -10,6 +10,17 @@ # Rewritten by Cort Dougan and Paul Mackerras # +ifdef cross_compiling + ifeq ($(CROSS_COMPILE),) + # Auto detect cross compiler prefix. + # Look for: (powerpc(64(le)?)?)(-unknown)?-linux(-gnu)?- + CC_ARCHES := powerpc powerpc64 powerpc64le + CC_SUFFIXES := linux linux-gnu unknown-linux-gnu + CROSS_COMPILE := $(call cc-cross-prefix, $(foreach a,$(CC_ARCHES), \ + $(foreach s,$(CC_SUFFIXES),$(a)-$(s)-))) + endif +endif + HAS_BIARCH := $(call cc-option-yn, -m32) # Set default 32 bits cross compilers for vdso and boot wrapper -- 2.30.2