From: Michael Ellerman <mpe@ellerman.id.au>
To: <linuxppc-dev@lists.ozlabs.org>
Subject: [PATCH 4/4] powerpc/Makefile: Auto detect cross compiler
Date: Wed, 6 Dec 2023 22:55:48 +1100 [thread overview]
Message-ID: <20231206115548.1466874-4-mpe@ellerman.id.au> (raw)
In-Reply-To: <20231206115548.1466874-1-mpe@ellerman.id.au>
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.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
---
arch/powerpc/Makefile | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
index 48c06f5a0dc1..051247027da0 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
--
2.43.0
next prev parent reply other threads:[~2023-12-06 11:59 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-12-06 11:55 [PATCH 1/4] powerpc/Makefile: Don't use $(ARCH) unnecessarily Michael Ellerman
2023-12-06 11:55 ` [PATCH 2/4] powerpc/vdso: No need to undef powerpc for 64-bit build Michael Ellerman
2023-12-06 16:18 ` Segher Boessenkool
2023-12-06 11:55 ` [PATCH 3/4] powerpc/Makefile: Default to ppc64le_defconfig when cross building Michael Ellerman
2023-12-06 11:55 ` Michael Ellerman [this message]
2023-12-06 16:25 ` [PATCH 4/4] powerpc/Makefile: Auto detect cross compiler Segher Boessenkool
2023-12-07 4:48 ` Michael Ellerman
2023-12-21 10:38 ` [PATCH 1/4] powerpc/Makefile: Don't use $(ARCH) unnecessarily Michael Ellerman
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