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sub_project.cmake
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sub_project.cmake
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################################################################################
#
# PSI Build utility CMake functionality
#
# Copyright (c) 2016. Domagoj Saric. All rights reserved.
#
################################################################################
# Implementation note: Because CMake lacks support for "One build, multiple
# compilers and packages."
# http://stackoverflow.com/questions/9542971/using-cmake-with-multiple-compilers-for-the-same-language
# http://cmake.3232098.n2.nabble.com/One-build-multiple-compilers-and-packages-td7585262.html
# http://www.kitware.com/media/html/BuildingExternalProjectsWithCMake2.8.html
# http://www.cmake.org/Wiki/CMake_FAQ#I_change_CMAKE_C_COMPILER_in_the_GUI_but_it_changes_back_on_the_next_configure_step._Why.3F
# (25.02.2016.) (Domagoj Saric)
################################################################################
cmake_minimum_required( VERSION 3.1 )
################################################################################
# PSI_add_abi_subproject()
################################################################################
function( PSI_add_abi_subproject project_name abi )
if ( PSI_subproject_build )
return()
endif()
if ( iOS ) #...mrmlj...cleanup this 'special pleading'...
install(
DIRECTORY "${PROJECT_BINARY_DIR}/Release/"
DESTINATION "lib"
COMPONENT Libraries
CONFIGURATIONS ${install_configs}
)
else()
install(
DIRECTORY "${PROJECT_BINARY_DIR}/lib"
DESTINATION "."
COMPONENT Libraries
CONFIGURATIONS ${install_configs}
)
endif()
if ( abi STREQUAL PSI_ABI )
return()
endif()
set( binary_dir "${PROJECT_BINARY_DIR}/${abi}" ) #CACHE INTERNAL "Directory that contains the cache of the subproject" )
message( STATUS "[PSI] Creating the separate * ${abi} * build tree:" )
if ( CMAKE_BUILD_TYPE )
list( APPEND extra_forwarded_variables -DCMAKE_BUILD_TYPE:STRING=${CMAKE_BUILD_TYPE} )
endif()
if ( CMAKE_TOOLCHAIN_FILE )
file( TO_NATIVE_PATH "${CMAKE_TOOLCHAIN_FILE}" native_toolchain_path )
list( APPEND extra_forwarded_variables -DCMAKE_TOOLCHAIN_FILE:FILEPATH=${native_toolchain_path} ) #...mrmlj...cmake barfs if quotes are used...todo...handle paths with spaces...
endif()
set( generator "${CMAKE_GENERATOR}" )
if( MSVC ) #...mrmlj...special msvc knowledge (different generator required for different ABI)...
if ( CMAKE_GENERATOR MATCHES 64 )
string( REPLACE " Win64" "" generator "${generator}" )
else()
set( generator "${generator} Win64" )
endif()
endif()
execute_process( COMMAND "${CMAKE_COMMAND}" -E make_directory "${binary_dir}" )
execute_process(
COMMAND "${CMAKE_COMMAND}"
-G ${generator}
-DPSI_subproject_build:BOOL=true
-DPSI_ABI:STRING=${abi}
-DPSI_binary_dir:PATH=${PROJECT_BINARY_DIR}
${extra_forwarded_variables}
${ARGN}
"${CMAKE_SOURCE_DIR}"
WORKING_DIRECTORY "${binary_dir}"
ERROR_VARIABLE stderr
OUTPUT_VARIABLE stdout
)
message( STATUS ${stdout} )
if ( stderr )
message( FATAL_ERROR "[PSI] ${abi} build tree creation failure:\n${stderr}" )
endif()
if ( generator MATCHES Ninja )
# Implementation note: limit/decrease the level of build parallelism to
# match the number of cores (Ninja's N+2 logic only hogs the build
# machine).
# Merely appending -j ${cpuCount} to the cmake --build command (after a
# -- delimiter) didn't work when executed from Visual Studio (CMake
# complained that it does not recognize the -j option).
# (28.02.2016.) (Domagoj Saric)
include( ProcessorCount )
ProcessorCount( cpuCount )
set( build_command ninja -C "${binary_dir}" -j ${cpuCount} )
else()
set( build_command "${CMAKE_COMMAND}" --build "${binary_dir}" --config "${CMAKE_CFG_INTDIR}" )
endif()
# Implementation note: For VS and projects which only generate a single
# target, try to guess the vcxproj name and include it directly instead of
# through the opaque CMake custom target (rethink this through: this may end
# up 'guessing' and including a single .vcxproj even though more are
# generated).
# (12.11.2015.) (Domagoj Saric)
set( possible_vs_subproject "${binary_dir}/${project_name}.vcxproj" )
if ( CMAKE_GENERATOR MATCHES Visual AND generator MATCHES Visual AND EXISTS "${possible_vs_subproject}" )
include_external_msproject( ${project_name}_${abi} "${possible_vs_subproject}" PLATFORM Win32 )
else()
add_custom_target( ${project_name}_${abi} ALL
COMMAND ${build_command}
COMMENT "Building ${project_name} for ${abi}..."
VERBATIM
)
endif()
endfunction()
################################################################################
# PSI_add_arch_library()
################################################################################
function( PSI_add_arch_library target_name target_label arch )
if ( NOT PSI_ABI )
# Implementation note: with makefile/non-IDE generators the 'root
# invocation' does not use a default ABI/create any targets in order to have
# a 'symmetrical' build (i.e. all binaries are built in subprojects).
# (03.06.2016.) (Domagoj Saric)
return()
endif()
# Implementation note: a workaround for the fact that the 'global' setting in
# gcc_compatibles.cmake seems to have no effect.
# (03.06.2016.) (Domagoj Saric)
cmake_policy( SET CMP0063 NEW )
set( base_target_name ${target_name} )
list( LENGTH PSI_ABIs number_of_abis )
list( LENGTH PSI_cpu_archs number_of_archs )
if ( ( number_of_archs GREATER 1 ) OR ( number_of_abis GREATER 1 ) )
set( target_name "${target_name}_${arch}" )
set( target_label "${target_label} (${arch})" )
endif()
set( target_name "${target_name}_${PSI_os_suffix}" )
# Implementation note: Because CMake is so defficient this function cannot be
# generalised to PSI_add_arch_target(), so that it supports both libraries
# and executables by using something like
# add_${target_type}
# instead of the 'hardcoded' add_library() call.
# (03.06.2016.) (Domagoj Saric)
add_library( ${target_name} ${ARGN} )
set_property( TARGET ${target_name} PROPERTY PROJECT_LABEL "${target_label}" )
PSI_setup_target_for_arch( ${target_name} ${base_target_name} ${arch} )
set( PSI_all_arch_targets ${PSI_all_arch_targets} ${target_name} PARENT_SCOPE )
if ( iOS )
PSI_ios_add_universal_build( ${target_name} )
endif()
endfunction()