if ccache is enabled, by default also enable CCACHE_DEPEND

This avoids the preprocessing step normally done by ccache (see
ccache docs), which speeds up the build.
This way there may be incorrect ccache hits if a system header
(found using -isystem) changes, but that should be rare and such
headers generally should be backwards compatible, so the chance
of an actual breakage should be very low.
The patch also adds --enable-ccache=nodepend to allow enabling ccache
without the depend mode.

https://lists.freedesktop.org/archives/libreoffice/2019-May/082684.html

Change-Id: Id69ca43988a016a917beb75927b39d8bde719aa7
Reviewed-on: https://gerrit.libreoffice.org/71629
Tested-by: Jenkins
Reviewed-by: Luboš Luňák <l.lunak@collabora.com>

0 files changed, 0 insertions, 0 deletions