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Message-Id: <2780d43e9d0a1e0e39e98b111766503eab01f4d7.1690916314.git.falcon@tinylab.org>
Date: Wed, 2 Aug 2023 03:49:02 +0800
From: Zhangjin Wu <falcon@...ylab.org>
To: thomas@...ch.de
Cc: falcon@...ylab.org, arnd@...db.de, linux-kernel@...r.kernel.org,
linux-kselftest@...r.kernel.org, w@....eu
Subject: [PATCH v4 12/12] selftests/nolibc: customize CROSS_COMPILE for 32/64-bit powerpc
The little-endian powerpc64le compilers provided by Ubuntu and Fedora
are able to compile big endian kernel and big endian nolibc-test [1].
These default CROSS_COMPILE settings allow to test target architectures
with:
$ cd /path/to/tools/testing/selftests/nolibc/
$ for arch in ppc ppc64 ppc64le; do \
make run-user ARCH=$arch | grep "status: "; \
done
If want to use another cross compiler, please simply pass CROSS_COMPILE
or CC as before.
For example, it is able to build 64-bit nolibc-test with the big endian
powerpc64-linux-gcc crosstool from [2]:
$ wget -c https://mirrors.edge.kernel.org/pub/tools/crosstool/files/bin/x86_64/13.1.0/x86_64-gcc-13.1.0-nolibc-powerpc64-linux.tar.xz
$ tar xvf x86_64-gcc-13.1.0-nolibc-powerpc64-linux.tar.xz
$ export PATH=$PWD/gcc-13.1.0-nolibc/powerpc64-linux/bin/:$PATH
$ export CROSS_COMPILE_ppc64=powerpc64-linux-
$ export CROSS_COMPILE_ppc64le=powerpc64-linux-
$ for arch in ppc64 ppc64le; do \
make run-user ARCH=$arch | grep "status: "; \
done
Or specify CC directly with full path:
$ export CC=$PWD/gcc-13.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc
$ for arch in ppc64 ppc64le; do \
make run-user ARCH=$arch | grep "status: "; \
done
[1]: https://github.com/open-power/skiboot
[2]: https://mirrors.edge.kernel.org/pub/tools/crosstool/
Signed-off-by: Zhangjin Wu <falcon@...ylab.org>
---
tools/testing/selftests/nolibc/Makefile | 3 +++
1 file changed, 3 insertions(+)
diff --git a/tools/testing/selftests/nolibc/Makefile b/tools/testing/selftests/nolibc/Makefile
index 822cc4bae619..f44a09c39235 100644
--- a/tools/testing/selftests/nolibc/Makefile
+++ b/tools/testing/selftests/nolibc/Makefile
@@ -59,6 +59,9 @@ IMAGE = $(IMAGE_$(XARCH))
IMAGE_NAME = $(notdir $(IMAGE))
# CROSS_COMPILE: cross toolchain prefix by architecture
+CROSS_COMPILE_ppc ?= powerpc-linux-gnu-
+CROSS_COMPILE_ppc64 ?= powerpc64le-linux-gnu-
+CROSS_COMPILE_ppc64le ?= powerpc64le-linux-gnu-
CROSS_COMPILE ?= $(CROSS_COMPILE_$(XARCH))
# make sure CC is prefixed with CROSS_COMPILE
--
2.25.1
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