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Diffstat (limited to 'cmake/MergeStaticLibs.cmake')
| -rw-r--r-- | cmake/MergeStaticLibs.cmake | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/cmake/MergeStaticLibs.cmake b/cmake/MergeStaticLibs.cmake new file mode 100644 index 000000000..346687a72 --- /dev/null +++ b/cmake/MergeStaticLibs.cmake @@ -0,0 +1,118 @@ + + +# Merge_static_libs(outlib lib1 lib2 ... libn) merges a number of static +# libs into a single static library +function(merge_static_libs outlib ) + set(libs ${ARGV}) + list(REMOVE_AT libs 0) +# Create a dummy file that the target will depend on + set(dummyfile ${CMAKE_CURRENT_BINARY_DIR}/${outlib}_dummy.c) + file(WRITE ${dummyfile} "const char * dummy = \"${dummyfile}\";") + + add_library(${outlib} STATIC ${dummyfile}) + + if("${CMAKE_CFG_INTDIR}" STREQUAL ".") + set(multiconfig FALSE) + else() + set(multiconfig TRUE) + endif() + +# First get the file names of the libraries to be merged + foreach(lib ${libs}) + get_target_property(libtype ${lib} TYPE) + if(NOT libtype STREQUAL "STATIC_LIBRARY") + message(FATAL_ERROR "Merge_static_libs can only process static libraries") + endif() + if(multiconfig) + foreach(CONFIG_TYPE ${CMAKE_CONFIGURATION_TYPES}) + get_target_property("libfile_${CONFIG_TYPE}" ${lib} "LOCATION_${CONFIG_TYPE}") + list(APPEND libfiles_${CONFIG_TYPE} ${libfile_${CONFIG_TYPE}}) + endforeach() + else() + get_target_property(libfile ${lib} LOCATION) + list(APPEND libfiles "${libfile}") + endif(multiconfig) + endforeach() + message(STATUS "will be merging ${libfiles}") +# Just to be sure: cleanup from duplicates + if(multiconfig) + foreach(CONFIG_TYPE ${CMAKE_CONFIGURATION_TYPES}) + list(REMOVE_DUPLICATES libfiles_${CONFIG_TYPE}) + set(libfiles ${libfiles} ${libfiles_${CONFIG_TYPE}}) + endforeach() + endif() + list(REMOVE_DUPLICATES libfiles) + +# Now the easy part for MSVC and for MAC + if(MSVC) + # lib.exe does the merging of libraries just need to conver the list into string + foreach(CONFIG_TYPE ${CMAKE_CONFIGURATION_TYPES}) + set(flags "") + foreach(lib ${libfiles_${CONFIG_TYPE}}) + set(flags "${flags} ${lib}") + endforeach() + string(TOUPPER "STATIC_LIBRARY_FLAGS_${CONFIG_TYPE}" PROPNAME) + set_target_properties(${outlib} PROPERTIES ${PROPNAME} "${flags}") + endforeach() + + elseif(APPLE) + # Use OSX's libtool to merge archives + if(multiconfig) + message(FATAL_ERROR "Multiple configurations are not supported") + endif() + get_target_property(outfile ${outlib} LOCATION) + add_custom_command(TARGET ${outlib} POST_BUILD + COMMAND rm ${outfile} + COMMAND /usr/bin/libtool -static -o ${outfile} + ${libfiles} + ) + else() + # general UNIX - need to "ar -x" and then "ar -ru" + if(multiconfig) + message(FATAL_ERROR "Multiple configurations are not supported") + endif() + get_target_property(outfile ${outlib} LOCATION) + message(STATUS "outfile location is ${outfile}") + foreach(lib ${libfiles}) +# objlistfile will contain the list of object files for the library + set(objlistfile ${lib}.objlist) + set(objdir ${lib}.objdir) + set(objlistcmake ${objlistfile}.cmake) +# we only need to extract files once + if(${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/cmake.check_cache IS_NEWER_THAN ${objlistcmake}) +#--------------------------------- + FILE(WRITE ${objlistcmake} +"# Extract object files from the library +message(STATUS \"Extracting object files from ${lib}\") +EXECUTE_PROCESS(COMMAND ${CMAKE_AR} -x ${lib} + WORKING_DIRECTORY ${objdir}) +# save the list of object files +EXECUTE_PROCESS(COMMAND ls . + OUTPUT_FILE ${objlistfile} + WORKING_DIRECTORY ${objdir})") +#--------------------------------- + file(MAKE_DIRECTORY ${objdir}) + add_custom_command( + OUTPUT ${objlistfile} + COMMAND ${CMAKE_COMMAND} -P ${objlistcmake} + DEPENDS ${lib}) + endif() + list(APPEND extrafiles "${objlistfile}") + # relative path is needed by ar under MSYS + file(RELATIVE_PATH objlistfilerpath ${objdir} ${objlistfile}) + add_custom_command(TARGET ${outlib} POST_BUILD + COMMAND ${CMAKE_COMMAND} -E echo "Running: ${CMAKE_AR} ru ${outfile} @${objlistfilerpath}" + COMMAND ${CMAKE_AR} ru "${outfile}" @"${objlistfilerpath}" + WORKING_DIRECTORY ${objdir}) + endforeach() + add_custom_command(TARGET ${outlib} POST_BUILD + COMMAND ${CMAKE_COMMAND} -E echo "Running: ${CMAKE_RANLIB} ${outfile}" + COMMAND ${CMAKE_RANLIB} ${outfile}) + endif() + file(WRITE ${dummyfile}.base "const char* ${outlib}_sublibs=\"${libs}\";") + add_custom_command( + OUTPUT ${dummyfile} + COMMAND ${CMAKE_COMMAND} -E copy ${dummyfile}.base ${dummyfile} + DEPENDS ${libs} ${extrafiles}) + + endfunction() |