[PATCH] selftests/powerpc: Fix build issue with output directory

[Michael Ellerman]

Harish <harish at linux.ibm.com> writes:
> We use OUTPUT directory as TMPOUT for checking no-pie option. When
> building powerpc/ from selftests directory, the OUTPUT directory
> eventually points to powerpc/pmu/ebb/ and gets removed when
> checking for -no-pie option in try-run routine, subsequently build
> fails with the following

It worked fine until:
  f2f02ebd8f38 ("kbuild: improve cc-option to clean up all temporary files") when building powerpc/ from selftests directory, the

I updated the change log to mention that.

cheers


> $ make -C powerpc
> ...
> ...
> TARGET=ebb; BUILD_TARGET=$OUTPUT/$TARGET; mkdir -p $BUILD_TARGET; make OUTPUT=$BUILD_TARGET -k -C $TARGET all
> make[2]: Entering directory '/home/linux-master/tools/testing/selftests/powerpc/pmu/ebb'
> make[2]: *** No rule to make target 'Makefile'.
> make[2]: Failed to remake makefile 'Makefile'.
> make[2]: *** No rule to make target 'ebb.c', needed by '/home/linux-master/tools/testing/selftests/powerpc/pmu/ebb/reg_access_test'.
> make[2]: *** No rule to make target 'ebb_handler.S', needed by '/home/linux-master/tools/testing/selftests/powerpc/pmu/ebb/reg_access_test'.
> make[2]: *** No rule to make target 'trace.c', needed by '/home/linux-master/tools/testing/selftests/powerpc/pmu/ebb/reg_access_test'.
> make[2]: *** No rule to make target 'busy_loop.S', needed by '/home/linux-master/tools/testing/selftests/powerpc/pmu/ebb/reg_access_test'.
> make[2]: Target 'all' not remade because of errors.
>
> Fix this by adding a suffix to the OUTPUT directory so that the
> failure is avoided
>
> Fixes: 9686813f6e9d ("selftests/powerpc: Fix try-run when source tree is not writable")
> Signed-off-by: Harish <harish at linux.ibm.com>