On Fri, Jul 28, 2023 at 04:28:17AM +0800, Zhangjin Wu wrote: > 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@xxxxxxxxxxx> > --- > 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 3f15c7f7ef76..6385915d16c9 100644 > --- a/tools/testing/selftests/nolibc/Makefile > +++ b/tools/testing/selftests/nolibc/Makefile > @@ -46,6 +46,9 @@ 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)) It seems to me that this patch and the previous one were rather for the PPC series as I'm not seeing the relation with the tiny config here. Willy
