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libutils: merge static libraries only once

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Because of common dependencies between the
static libraries list can contain duplicates.

We reduce these down to the single last one in
the list.

This reduces the relative time of a rebuild from:

$ (cd builddir/; time make -j)
...
real	0m30.789s
user	1m33.477s
sys	0m19.678s

and the LIB entries
$ grep ADDLIB builddir/libmysqld/mysqlserver-\$\<CONFIG\>.mri.tpl  | wc -l
179

$ du -h builddir/libmysqld/libmariadbd.a
4.1G	builddir/libmysqld/libmariadbd.a

To:

$ (cd builddir/; time make -j)
...
real	0m20.139s
user	1m32.423s
sys	0m12.208s

$ grep ADDLIB builddir/libmysqld/mysqlserver-\$\<CONFIG\>.mri.tpl  | wc -l
25

$ du -h builddir/libmysqld/libmariadbd.a
688M	builddir/libmysqld/libmariadbd.a
This commit is contained in:
Daniel Black 2020-06-17 22:01:57 +10:00 committed by Marko Mäkelä
parent c515b1d092
commit 38774f8dcb
1 changed files with 10 additions and 0 deletions
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10
cmake/libutils.cmake
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@ -165,8 +165,18 @@ MACRO(MERGE_STATIC_LIBS TARGET OUTPUT_NAME LIBS_TO_MERGE)
ENDIF()
ENDIF()
ENDFOREACH()
# With static libraries the order matter to some linkers.
# REMOVE_DUPLICATES will keep the first entry and because
# the linker requirement we want to keep the last.
IF(STATIC_LIBS)
LIST(REVERSE STATIC_LIBS)
LIST(REMOVE_DUPLICATES STATIC_LIBS)
LIST(REVERSE STATIC_LIBS)
ENDIF()
IF(OSLIBS)
LIST(REVERSE OSLIBS)
LIST(REMOVE_DUPLICATES OSLIBS)
LIST(REVERSE OSLIBS)
TARGET_LINK_LIBRARIES(${TARGET} ${OSLIBS})
ENDIF()