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include(ExternalProject)
include(ProcessorCount)
set(${PROJECT_NAME}_DEP_INSTALL_PREFIX "${CMAKE_CURRENT_BINARY_DIR}/destdir/usr/local" CACHE PATH "Destination directory")
set(${PROJECT_NAME}_DEP_DOWNLOAD_DIR ${CMAKE_CURRENT_BINARY_DIR}/downloads CACHE PATH "Path for downloaded source packages.")
option(${PROJECT_NAME}_DEP_BUILD_VERBOSE "Use verbose output for each dependency build" OFF)
get_property(_is_multi GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
if (NOT CMAKE_BUILD_TYPE)
set(CMAKE_BUILD_TYPE Release)
message(STATUS "Forcing CMAKE_BUILD_TYPE to Release as it was not specified.")
endif ()
# The value of CMAKE_BUILD_TYPE will be used for building each dependency even if the
# generator is multi-config. Use this var to specify build type regardless of the generator.
function(add_cmake_project projectname)
cmake_parse_arguments(P_ARGS "" "INSTALL_DIR;BUILD_COMMAND;INSTALL_COMMAND" "CMAKE_ARGS" ${ARGN})
set(_pcount ${DEP_${projectname}_MAX_THREADS})
if (NOT _pcount)
set(_pcount ${DEP_MAX_THREADS})
endif ()
if (NOT _pcount)
ProcessorCount(_pcount)
endif ()
if (_pcount EQUAL 0)
set(_pcount 1)
endif ()
set(_build_j "-j${_pcount}")
if (CMAKE_GENERATOR MATCHES "Visual Studio")
set(_build_j "-m:${_pcount}")
endif ()
string(TOUPPER "${CMAKE_BUILD_TYPE}" _build_type_upper)
set(_configs_line -DCMAKE_BUILD_TYPE:STRING=${CMAKE_BUILD_TYPE})
if (_is_multi)
set(_configs_line "")
endif ()
set(_verbose_switch "")
if (${PROJECT_NAME}_DEP_BUILD_VERBOSE)
if (CMAKE_GENERATOR MATCHES "Ninja")
set(_verbose_switch "--verbose")
elseif (CMAKE_GENERATOR MATCHES "Visual Studio")
set(_verbose_switch "-v:d")
endif ()
endif ()
ExternalProject_Add(
dep_${projectname}
INSTALL_DIR ${${PROJECT_NAME}_DEP_INSTALL_PREFIX}
DOWNLOAD_DIR ${${PROJECT_NAME}_DEP_DOWNLOAD_DIR}/${projectname}
CMAKE_ARGS
-DCMAKE_INSTALL_PREFIX:STRING=${${PROJECT_NAME}_DEP_INSTALL_PREFIX}
-DCMAKE_MODULE_PATH:STRING=${CMAKE_MODULE_PATH}
-DCMAKE_PREFIX_PATH:STRING=${${PROJECT_NAME}_DEP_INSTALL_PREFIX}
-DCMAKE_DEBUG_POSTFIX:STRING=${CMAKE_DEBUG_POSTFIX}
-DCMAKE_C_COMPILER:STRING=${CMAKE_C_COMPILER}
-DCMAKE_CXX_COMPILER:STRING=${CMAKE_CXX_COMPILER}
-DCMAKE_CXX_FLAGS:STRING=${CMAKE_CXX_FLAGS}
-DCMAKE_CXX_FLAGS_${_build_type_upper}:STRING=${CMAKE_CXX_FLAGS_${_build_type_upper}}
-DCMAKE_C_FLAGS:STRING=${CMAKE_C_FLAGS}
-DCMAKE_C_FLAGS_${_build_type_upper}:STRING=${CMAKE_C_FLAGS_${_build_type_upper}}
-DCMAKE_TOOLCHAIN_FILE:STRING=${CMAKE_TOOLCHAIN_FILE}
-DBUILD_SHARED_LIBS:BOOL=${BUILD_SHARED_LIBS}
-DCMAKE_POSITION_INDEPENDENT_CODE=${CMAKE_POSITION_INDEPENDENT_CODE}
"${_configs_line}"
${DEP_CMAKE_OPTS}
${P_ARGS_CMAKE_ARGS}
${P_ARGS_UNPARSED_ARGUMENTS}
BUILD_COMMAND ${CMAKE_COMMAND} --build . --config ${CMAKE_BUILD_TYPE} -- ${_build_j} ${_verbose_switch}
INSTALL_COMMAND ${CMAKE_COMMAND} --build . --target install --config ${CMAKE_BUILD_TYPE}
)
endfunction(add_cmake_project)
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