[LTP] [PATCH 1/2] testcases.mk: Fix libs/ path for out-of-tree build

[Petr Vorel]

Hi,

> The path to the Makefile was not correct for the out-of-tree build
> because it was pointing to the build directory rather than to the source
> directory.

> Apparently this also caused random failures for out-of-tree build. For
> some reason when building syscalls/set_mempolicy/ testcases the rebuild
> of the libltpnuma.a library is triggered for out-of-tree build for about
> 10% of the cases on massively parallel build. Which as far as I can tell
> shouldn't happen since we build everything in the libs/ directory as a
> prerequisite of the testcases/ directory. So there is likely some
> strange race condition happening and while this does not fix the actual
> race it makes it quite harmless since the target was already build and
> the make in the libs/libltpnuma/ directory will be no-op.

> Signed-off-by: Cyril Hrubis <chrubis@suse.cz>
> CC: Petr Vorel <pvorel@suse.cz>
> CC: Jan Stancek <jstancek@redhat.com>
> ---
Tested-by: Petr Vorel <pvorel@suse.cz>
On 32 core machine, running for several hours (now 66 builds without failure).


Kind regards,
Petr

>  include/mk/testcases.mk | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

> diff --git a/include/mk/testcases.mk b/include/mk/testcases.mk
> index 131854ec7..684655fbf 100644
> --- a/include/mk/testcases.mk
> +++ b/include/mk/testcases.mk
> @@ -49,7 +49,7 @@ LTPLIBS_FILES = $(addsuffix .a, $(addprefix $(abs_top_builddir)/libs/, $(foreach
>  MAKE_DEPS += $(LTPLIBS_FILES)

>  $(LTPLIBS_FILES): $(LTPLIBS_DIRS)
> -	$(MAKE) -C "$^" -f "$^/Makefile" all
> +	$(MAKE) -C "$^" -f "$(subst $(abs_top_builddir),$(abs_top_srcdir),$^)/Makefile" all

>  LDFLAGS += $(addprefix -L$(top_builddir)/libs/lib, $(LTPLIBS))