add BLOCK_PCH to gbuild, allowing partial non-PCH rebuilds

Desktop / LibreOffice - Luboš Luňák [collabora.com] - 10 February 2020 09:10 EST

Both MSVC and Clang (with -building-pch-with-obj) generate one extra object file for code from the PCH, saving repeated generating of this code for every object using the PCH. This causes problems when temporarily disabling PCH by doing 'make ENABLE_PCH=' (e.g. when checking #include's are correct), as this object would no longer be linked in, and objects not rebuilt with PCH disabled would still need it. This patch allows doing 'make BLOCK_PCH=1' instead, which will disable PCH with the exception of this object file still getting linked in.

Change-Id: I8fcb150ef27ebb34118d62739a1a1558aa1a6f3d Reviewed-on: https://gerrit.libreoffice.org/c/core/+/88341

396d1019413e add BLOCK_PCH to gbuild, allowing partial non-PCH rebuilds
solenv/gbuild/LinkTarget.mk | 37 +++++++++++++++++++++++++---------
solenv/gbuild/PrecompiledHeaders.mk | 22 ++++++++++----------
solenv/gbuild/gbuild.mk | 7 +++++++
solenv/gbuild/platform/com_GCC_defs.mk | 4 ++--
4 files changed, 47 insertions(+), 23 deletions(-)

Upstream: cgit.freedesktop.org


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