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include(ExternalProject)
# add_subproject(<name> [NO_INSTALL] [DIR <dirname>] [DEPENDS [subpro_dep ...]])
function(add_subproject _name)
cmake_parse_arguments(_arg "NO_INSTALL" "DIR" "DEPENDS" ${ARGN})
if(_arg_UNPARSED_ARGUMENTS)
message(FATAL_ERROR "There are unparsed arguments")
endif()
set(_maybe_NO_INSTALL)
if(_arg_NO_INSTALL)
set(_maybe_NO_INSTALL INSTALL_COMMAND "")
endif()
if(CMAKE_GENERATOR MATCHES "Ninja Multi-Config")
# Replace list separator before passing on to ExternalProject_Add
string(REPLACE ";" "|" _CONFIGURATION_TYPES "${CMAKE_CONFIGURATION_TYPES}")
string(REPLACE ";" "|" _CROSS_CONFIGS "${CMAKE_CROSS_CONFIGS}")
string(REPLACE ";" "|" _DEFAULT_CONFIGS "${CMAKE_DEFAULT_CONFIGS}")
set(_maybe_NINJA_MULTICONFIG_ARGS
"-DCMAKE_CONFIGURATION_TYPES:STRINGS=${_CONFIGURATION_TYPES}"
"-DCMAKE_CROSS_CONFIGS:STRINGS=${_CROSS_CONFIGS}"
"-DCMAKE_DEFAULT_BUILD_TYPE:STRING=${CMAKE_DEFAULT_BUILD_TYPE}"
"-DCMAKE_DEFAULT_CONFIGS:STRINGS=${_DEFAULT_CONFIGS}"
)
endif()
ExternalProject_Add("${_name}"
DOWNLOAD_COMMAND ""
UPDATE_COMMAND ""
UPDATE_DISCONNECTED ON
"${_maybe_NO_INSTALL}"
BUILD_ALWAYS ON
LOG_DOWNLOAD OFF
LOG_UPDATE OFF
LOG_PATCH OFF
LOG_CONFIGURE OFF
LOG_BUILD OFF
LOG_INSTALL OFF
SOURCE_DIR "${PROJECT_SOURCE_DIR}/${_arg_DIR}"
# Private build directory per subproject
BINARY_DIR "${PROJECT_BINARY_DIR}/subproject/${_arg_DIR}"
# Common install directory, populated immediately
# during build (during build - not install - of superproject)
INSTALL_DIR "${CMAKE_INSTALL_PREFIX}"
DEPENDS
${_arg_DEPENDS}
LIST_SEPARATOR "|"
CMAKE_ARGS
"-DCMAKE_INSTALL_PREFIX:PATH=<INSTALL_DIR>"
# We can rely on ExternalProject to pick the right
# generator (and architecture/toolset where applicable),
# however, we need to explicitly inherit other parent
# project's build settings.
"-DCMAKE_BUILD_TYPE:STRING=${CMAKE_BUILD_TYPE}"
"${_maybe_NINJA_MULTICONFIG_ARGS}"
# Subproject progress reports clutter up the output, disable
"-DCMAKE_TARGET_MESSAGES:BOOL=OFF"
"-DCMAKE_RULE_MESSAGES:BOOL=OFF"
)
endfunction()
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