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# Copyright (C) 2012 Modelon AB
# This program is free software: you can redistribute it and/or modify
# it under the terms of the BSD style license.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# FMILIB_License.txt file for more details.
# You should have received a copy of the FMILIB_License.txt file
# along with this program. If not, contact Modelon AB <http://www.modelon.com>.
# 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)
list(REMOVE_DUPLICATES libs) # just in case
# First get the file names of the libraries to be merged
foreach(lib ${libs})
get_target_property(libtype ${lib} TYPE)
if(NOT libtype STREQUAL "STATIC_LIBRARY")
message(FATAL_ERROR "merge_static_libs can only process static libraries")
endif()
set(libfiles "${libfiles} $<TARGET_FILE:${lib}>")
endforeach()
if(MSVC) # lib.exe does the merging of given a list
set_target_properties(${outlib} PROPERTIES STATIC_LIBRARY_FLAGS "${libfiles}")
elseif(APPLE) # Use OSX's libtool to merge archives
add_custom_command(TARGET ${outlib} POST_BUILD
COMMAND rm "$<TARGET_FILE:${outlib}>"
COMMAND /usr/bin/libtool -static -o "$<TARGET_FILE:${outlib}>" ${libfiles})
else() # general UNIX: use "ar" to extract objects and re-add to a common lib
foreach(lib ${libs})
set(objlistfile ${lib}.objlist) # list of objects in the input library
set(objdir ${lib}.objdir)
add_custom_command(OUTPUT ${objdir}
COMMAND ${CMAKE_COMMAND} -E make_directory ${objdir})
add_custom_command(OUTPUT ${objlistfile}
COMMAND ${CMAKE_AR} -x "$<TARGET_FILE:${lib}>"
COMMAND ${CMAKE_AR} -t "$<TARGET_FILE:${lib}>" > ../${objlistfile}
DEPENDS ${lib} ${objdir}
WORKING_DIRECTORY ${objdir})
# Empty dummy source file that goes into merged library
set(mergebase ${lib}.mergebase.c)
add_custom_command(OUTPUT ${mergebase}
COMMAND ${CMAKE_COMMAND} -E touch ${mergebase}
DEPENDS ${objlistfile})
list(APPEND mergebases "${mergebase}")
endforeach()
# We need a target for the output merged library
add_library(${outlib} STATIC ${mergebases})
set(outlibfile "$<TARGET_FILE:${outlib}>")
foreach(lib ${libs})
add_custom_command(TARGET ${outlib} POST_BUILD
COMMAND ${CMAKE_AR} ru ${outlibfile} @"../${objlistfile}"
WORKING_DIRECTORY ${objdir})
endforeach()
add_custom_command(TARGET ${outlib} POST_BUILD
COMMAND ${CMAKE_RANLIB} ${outlibfile})
endif()
endfunction()
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