On Tue, Dec 12, 2023 at 04:27:12PM +0100, David Hildenbrand wrote:

> I usually build my stuff in-tree, so I don't really have a lot of experience
> with out-of-tree selftest builds and the whole kernel header inclusion (and
> how we could avoid the "make headers" and place the headers somewhere else).

It's generally something along the lines of (from tuxmake):

   make --silent --keep-going --jobs=15 O=/build/stage/build-work INSTALL_PATH=/build/stage/build-work/kselftest_install ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- CROSS_COMPILE_COMPAT=arm-linux-gnueabihf- kselftest-install

possibly with a -C in there to find the kernel source (from KernelCI):

   make KBUILD_BUILD_USER=KernelCI FORMAT=.xz ARCH=arm64 HOSTCC=gcc CROSS_COMPILE=aarch64-linux-gnu- CROSS_COMPILE_COMPAT=arm-linux-gnueabihf- CC="ccache aarch64-linux-gnu-gcc" O=/tmp/kci/linux/build -C/tmp/kci/linux -j10 kselftest-gen_tar