Since commit ("selftests: error out if kernel header files are not yet built") got merged, the kselftest build correctly because the KBUILD_OUTPUT isn't set when building out-of-tree and specifying 'O=' This is the error message that pops up.
make --silent --keep-going --jobs=32 O=/home/anders/.cache/tuxmake/builds/1482/build INSTALL_PATH=/home/anders/.cache/tuxmake/builds/1482/build/kselftest_install ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- V=1 CROSS_COMPILE_COMPAT=arm-linux-gnueabihf- kselftest-install make[3]: Entering directory '/home/anders/src/kernel/next/tools/testing/selftests/alsa'
-e [1;31merror[0m: missing kernel header files. Please run this and try again:
cd /home/anders/src/kernel/next/tools/testing/selftests/../../.. make headers
make[3]: Leaving directory '/home/anders/src/kernel/next/tools/testing/selftests/alsa' make[3]: *** [../lib.mk:77: kernel_header_files] Error 1
Fixing the issue by assigning KBUILD_OUTPUT the same way how its done in kselftest's Makefile. By adding 'KBUILD_OUTPUT := $(O)' 'if $(origin O)' is set to 'command line'. This will set the the BUILD dir to KBUILD_OUTPUT/kselftest when doing out-of-tree builds which makes them in its own separete output directory.
Signed-off-by: Anders Roxell anders.roxell@linaro.org --- tools/testing/selftests/lib.mk | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk index b8ea03b9a015..d17854285f2b 100644 --- a/tools/testing/selftests/lib.mk +++ b/tools/testing/selftests/lib.mk @@ -44,6 +44,10 @@ endif selfdir = $(realpath $(dir $(filter %/lib.mk,$(MAKEFILE_LIST)))) top_srcdir = $(selfdir)/../../..
+ifeq ("$(origin O)", "command line") + KBUILD_OUTPUT := $(O) +endif + ifneq ($(KBUILD_OUTPUT),) # Make's built-in functions such as $(abspath ...), $(realpath ...) cannot # expand a shell special character '~'. We use a somewhat tedious way here.