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qmake: Add support for a custom cache launcher like sccache 

qmake has a feature to prepend 'ccache' to each compiler and linker
command.

Add a new feature to allow customizing the cache launcher prefix,
to be able to use other cache launchers like 'sccache'.

Can be done by running:
  qmake CONFIG+=ccache QMAKE_CACHE_LAUNCHER_PREFIX=sccache

Pick-to: 6.8 6.9 6.10
Task-number: QTBUG-139139
Change-Id: Ic14caa7796ac6fca8eb85dbeb51ce8c13a3cfa3f
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>
This commit is contained in:
Alexandru Croitor 2025-08-14 14:43:41 +02:00
parent 038ccd24f8
commit 4b56619614
1 changed files with 9 additions and 5 deletions
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14
mkspecs/features/unix/ccache.prf
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@ -2,18 +2,22 @@ macx-xcode: return()
darwin: load(sdk) darwin: load(sdk)
ccache_prefix = ccache launcher_prefix = ccache
precompile_header { !isEmpty(QMAKE_CACHE_LAUNCHER_PREFIX) {
launcher_prefix = $$QMAKE_CACHE_LAUNCHER_PREFIX
}
precompile_header:contains(launcher_prefix, ccache) {
CCACHE_SLOPPINESS += pch_defines time_macros CCACHE_SLOPPINESS += pch_defines time_macros
ccache_prefix = \ launcher_prefix = \
CCACHE_SLOPPINESS=\"$$join(CCACHE_SLOPPINESS, ',')\$${CCACHE_SLOPPINESS+,\$$CCACHE_SLOPPINESS}\" \ CCACHE_SLOPPINESS=\"$$join(CCACHE_SLOPPINESS, ',')\$${CCACHE_SLOPPINESS+,\$$CCACHE_SLOPPINESS}\" \
# Make sure we build sources directly, not from their preprocessed version, # Make sure we build sources directly, not from their preprocessed version,
# otherwise precompiled headers will not be used during cache misses. # otherwise precompiled headers will not be used during cache misses.
CCACHE_CPP2=true \ CCACHE_CPP2=true \
$$ccache_prefix $$launcher_prefix
} }
for(tool, $$list(QMAKE_CC QMAKE_CXX QMAKE_LINK QMAKE_LINK_SHLIB QMAKE_LINK_C)): \ for(tool, $$list(QMAKE_CC QMAKE_CXX QMAKE_LINK QMAKE_LINK_SHLIB QMAKE_LINK_C)): \
$$tool = $$ccache_prefix $$eval($$tool) $$tool = $$launcher_prefix $$eval($$tool)