On Fri, Jul 12, 2019 at 6:57 AM Ilya Leoshkevich <iii@xxxxxxxxxxxxx> wrote: > > When directories are used as prerequisites in Makefiles, they can cause > a lot of unnecessary rebuilds, because a directory is considered changed > whenever a file in this directory is added, removed or modified. > > If the only thing a target is interested in is the existence of the > directory it depends on, which is the case for selftests/bpf, this > directory should be specified as an order-only prerequisite: it would > still be created in case it does not exist, but it would not trigger a > rebuild of a target in case it's considered changed. > > Signed-off-by: Ilya Leoshkevich <iii@xxxxxxxxxxxxx> > --- Thanks! Acked-by: Andrii Nakryiko <andriin@xxxxxx> > tools/testing/selftests/bpf/Makefile | 16 ++++++++-------- > 1 file changed, 8 insertions(+), 8 deletions(-) > [...]
