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CMake

# ***** BEGIN LICENSE BLOCK *****
#
# Copyright 2017 Yzena Tech
#
# Licensed under the Apache License, Version 2.0 (the "Apache License")
# with the following modification; you may not use this file except in
# compliance with the Apache License and the following modification to it:
# Section 6. Trademarks. is deleted and replaced with:
#
# 6. Trademarks. This License does not grant permission to use the trade
# names, trademarks, service marks, or product names of the Licensor
# and its affiliates, except as required to comply with Section 4(c) of
# the License and to reproduce the content of the NOTICE file.
#
# You may obtain a copy of the Apache License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the Apache License with the above modification is
# distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the Apache License for the specific
# language governing permissions and limitations under the Apache License.
#
# The function merge_static_libs is under the following copyright and license:
# 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 BSD license along with this program.
# If not, contact Modelon AB <http://www.modelon.com>.
#
# ****** END LICENSE BLOCK ******
# Make sure we save this.
set(SCRIPT_DIR "${CMAKE_CURRENT_SOURCE_DIR}" CACHE STRING "Directory of the merge script")
set(MERGE_LIBS "" CACHE STRING "List of libraries to merge")
# For some reason, we get stupid CMake warnings.
cmake_policy(SET CMP0026 NEW)
# 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} "// ${dummyfile}")
add_library(${outlib} STATIC ${dummyfile})
get_target_property(target_prefix "${outlib}" PREFIX)
get_target_property(target_suffix "${outlib}" SUFFIX)
set(outfile "${CMAKE_CURRENT_BINARY_DIR}/${target_prefix}${outlib}${target_suffix}")
# Make sure all libs are static.
foreach(lib ${MERGE_LIBS})
get_target_property(libtype ${lib} TYPE)
if(NOT libtype STREQUAL "STATIC_LIBRARY")
message(FATAL_ERROR "Merge_static_libs can only process static libraries")
endif()
endforeach()
# If we are on a multiconfig build system...
if(NOT"${CMAKE_CFG_INTDIR}" STREQUAL ".")
# Generate a list for each config type.
foreach(lib ${MERGE_LIBS})
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()
endforeach()
# Dedup the lists.
foreach(CONFIG_TYPE ${CMAKE_CONFIGURATION_TYPES})
list(REMOVE_DUPLICATES libfiles_${CONFIG_TYPE})
set(libfiles ${libfiles} ${libfiles_${CONFIG_TYPE}})
endforeach()
endif()
# Rename.
set(libfiles "${MERGE_LIBS}")
# Just to be sure: cleanup from duplicates
list(REMOVE_DUPLICATES libfiles)
message(STATUS "will be merging ${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.
# We can't handle multiconfigs.
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"
# We can't handle multiconfigs.
if(multiconfig)
message(FATAL_ERROR "Multiple configurations are not supported")
endif()
# Loop over the files.
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})
#---------------------------------
string(CONCAT file_content
"# 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(WRITE ${objlistcmake} "${file_content}")
#---------------------------------
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} ${extrafiles})
endfunction()
function(merge_lib name output)
get_target_property(target_prefix "${name}" PREFIX)
get_target_property(target_suffix "${name}" SUFFIX)
list(APPEND MERGE_LIBS
"${CMAKE_CURRENT_BINARY_DIR}/${target_prefix}${output}${target_suffix}")
endfunction(merge_lib)
function(create_test target)
add_executable("${target}" "${target}.c")
target_link_libraries("${target}" "${ARGN}")
add_test(NAME ${target} COMMAND "$<TARGET_FILE:${target}>")
endfunction(create_test)
function(create_shared_library name output_name src doinstall)
add_library("${name}" SHARED "${src}")
target_link_libraries("${name}" "${ARGN}")
set_target_properties("${name}"
PROPERTIES
OUTPUT_NAME "${output_name}")
if(doinstall)
install(TARGETS "${name}" LIBRARY DESTINATION lib/)
endif(doinstall)
endfunction(create_shared_library)
function(create_static_library name output_name src doinstall domerge)
add_library("${name}" STATIC "${src}")
target_link_libraries("${name}" "${ARGN}")
set_target_properties("${name}"
PROPERTIES
OUTPUT_NAME "${output_name}")
if(doinstall)
install(TARGETS "${name}" ARCHIVE DESTINATION lib/)
endif(doinstall)
if(domerge)
merge_lib("${name}" "${output_name}")
endif(domerge)
endfunction(create_static_library)
function(create_pic_library name output_name src doinstall)
add_library("${name}" STATIC "${src}")
target_link_libraries("${name}" "${ARGN}")
set_target_properties("${name}"
PROPERTIES
OUTPUT_NAME "${output_name}"
POSITION_INDEPENDENT_CODE ON)
if(doinstall)
install(TARGETS "${name}" ARCHIVE DESTINATION lib/)
endif(doinstall)
if(domerge)
merge_lib("${name}" "${output_name}")
endif(domerge)
endfunction(create_pic_library)
function(create_all_libraries shared_name static_name pic_name output_name src doinstall)
create_shared_library("${shared_name}" "${output_name}" "${src}" "${doinstall}" "${ARGN}")
create_static_library("${static_name}" "${output_name}" "${src}" "${doinstall}" NO "${ARGN}")
create_pic_library("${pic_name}" "${output_name}_pic" "${src}" "${doinstall}" NO "${ARGN}")
endfunction(create_all_libraries)