dino/cmake/PkgConfigWithFallback.cmake

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CMake
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include(CMakeParseArguments)
function(find_pkg_config_with_fallback name)
cmake_parse_arguments(ARGS "" "PKG_CONFIG_NAME" "LIB_NAMES;LIB_DIR_HINTS;INCLUDE_NAMES;INCLUDE_DIR_PATHS;INCLUDE_DIR_HINTS;INCLUDE_DIR_SUFFIXES;DEPENDS" ${ARGN})
set(${name}_PKG_CONFIG_NAME ${ARGS_PKG_CONFIG_NAME} PARENT_SCOPE)
find_package(PkgConfig)
if(PKG_CONFIG_FOUND)
pkg_search_module(${name}_PKG_CONFIG QUIET ${ARGS_PKG_CONFIG_NAME})
endif(PKG_CONFIG_FOUND)
if (${name}_PKG_CONFIG_FOUND)
# Found via pkg-config, using it's result values
set(${name}_FOUND ${${name}_PKG_CONFIG_FOUND})
# Try to find real file name of libraries
foreach(lib ${${name}_PKG_CONFIG_LIBRARIES})
find_library(${name}_${lib}_LIBRARY ${lib} HINTS ${${name}_PKG_CONFIG_LIBRARY_DIRS})
mark_as_advanced(${name}_${lib}_LIBRARY)
if(NOT ${name}_${lib}_LIBRARY)
unset(${name}_FOUND)
endif(NOT ${name}_${lib}_LIBRARY)
endforeach(lib)
if(${name}_FOUND)
set(${name}_LIBRARIES "")
foreach(lib ${${name}_PKG_CONFIG_LIBRARIES})
list(APPEND ${name}_LIBRARIES ${${name}_${lib}_LIBRARY})
endforeach(lib)
list(REMOVE_DUPLICATES ${name}_LIBRARIES)
set(${name}_LIBRARIES ${${name}_LIBRARIES} PARENT_SCOPE)
list(GET ${name}_LIBRARIES "0" ${name}_LIBRARY)
set(${name}_FOUND ${${name}_FOUND} PARENT_SCOPE)
set(${name}_INCLUDE_DIRS ${${name}_PKG_CONFIG_INCLUDE_DIRS} PARENT_SCOPE)
set(${name}_LIBRARIES ${${name}_PKG_CONFIG_LIBRARIES} PARENT_SCOPE)
set(${name}_LIBRARY ${${name}_LIBRARY} PARENT_SCOPE)
set(${name}_VERSION ${${name}_PKG_CONFIG_VERSION} PARENT_SCOPE)
if(NOT TARGET ${ARGS_PKG_CONFIG_NAME})
add_library(${ARGS_PKG_CONFIG_NAME} INTERFACE IMPORTED)
set_property(TARGET ${ARGS_PKG_CONFIG_NAME} PROPERTY INTERFACE_COMPILE_OPTIONS "${${name}_PKG_CONFIG_CFLAGS_OTHER}")
set_property(TARGET ${ARGS_PKG_CONFIG_NAME} PROPERTY INTERFACE_INCLUDE_DIRECTORIES "${${name}_PKG_CONFIG_INCLUDE_DIRS}")
set_property(TARGET ${ARGS_PKG_CONFIG_NAME} PROPERTY INTERFACE_LINK_LIBRARIES "${${name}_LIBRARIES}")
endif(NOT TARGET ${ARGS_PKG_CONFIG_NAME})
endif(${name}_FOUND)
else(${name}_PKG_CONFIG_FOUND)
# No success with pkg-config, try via find_library on all lib_names
set(${name}_FOUND "1")
foreach(lib ${ARGS_LIB_NAMES})
find_library(${name}_${lib}_LIBRARY ${ARGS_LIB_NAMES} HINTS ${ARGS_LIB_DIR_HINTS})
mark_as_advanced(${name}_${lib}_LIBRARY)
if(NOT ${name}_${lib}_LIBRARY)
unset(${name}_FOUND)
endif(NOT ${name}_${lib}_LIBRARY)
endforeach(lib)
foreach(inc ${ARGS_INCLUDE_NAMES})
find_path(${name}_${inc}_INCLUDE_PATH ${inc} HINTS ${ARGS_INCLUDE_DIR_HINTS} PATHS ${ARGS_INCLUDE_DIR_PATHS} PATH_SUFFIXES ${ARGS_INCLUDE_DIR_SUFFIXES})
mark_as_advanced(${name}_${inc}_INCLUDE_PATH)
if(NOT ${name}_${inc}_INCLUDE_PATH)
unset(${name}_FOUND)
endif(NOT ${name}_${inc}_INCLUDE_PATH)
endforeach(inc)
if(${name}_FOUND)
set(${name}_LIBRARIES "")
set(${name}_INCLUDE_DIRS "")
foreach(lib ${ARGS_LIB_NAMES})
list(APPEND ${name}_LIBRARIES ${${name}_${lib}_LIBRARY})
endforeach(lib)
foreach(inc ${ARGS_INCLUDE_NAMES})
list(APPEND ${name}_INCLUDE_DIRS ${${name}_${inc}_INCLUDE_PATH})
endforeach(inc)
list(GET ${name}_LIBRARIES "0" ${name}_LIBRARY)
foreach(dep ${ARGS_DEPENDS})
find_package(${dep} ${${dep}_GLOBAL_VERSION} QUIET)
if(${dep}_FOUND)
list(APPEND ${name}_INCLUDE_DIRS ${${dep}_INCLUDE_DIRS})
list(APPEND ${name}_LIBRARIES ${${dep}_LIBRARIES})
else(${dep}_FOUND)
unset(${name}_FOUND)
endif(${dep}_FOUND)
endforeach(dep)
set(${name}_FOUND ${${name}_FOUND} PARENT_SCOPE)
set(${name}_INCLUDE_DIRS ${${name}_INCLUDE_DIRS} PARENT_SCOPE)
set(${name}_LIBRARIES ${${name}_LIBRARIES} PARENT_SCOPE)
set(${name}_LIBRARY ${${name}_LIBRARY} PARENT_SCOPE)
unset(${name}_VERSION PARENT_SCOPE)
if(NOT TARGET ${ARGS_PKG_CONFIG_NAME})
add_library(${ARGS_PKG_CONFIG_NAME} INTERFACE IMPORTED)
set_property(TARGET ${ARGS_PKG_CONFIG_NAME} PROPERTY INTERFACE_INCLUDE_DIRECTORIES "${${name}_INCLUDE_DIRS}")
set_property(TARGET ${ARGS_PKG_CONFIG_NAME} PROPERTY INTERFACE_LINK_LIBRARIES "${${name}_LIBRARIES}")
endif(NOT TARGET ${ARGS_PKG_CONFIG_NAME})
endif(${name}_FOUND)
endif(${name}_PKG_CONFIG_FOUND)
endfunction()