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ExternalLibraryHelper.cmake
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ExternalLibraryHelper.cmake
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include(FindPackageMessage)
# Find a library component, set the variables and create an imported target.
# Variable names are compliant with cmake standards.
function(find_component LIB COMPONENT)
cmake_parse_arguments(ARG
""
""
"HINTS;INCLUDE_DIRS;INTERFACE_LINK_LIBRARIES;NAMES;PATHS;PATH_SUFFIXES"
${ARGN}
)
# If the component is not requested, skip the search.
if(${LIB}_FIND_COMPONENTS AND NOT ${COMPONENT} IN_LIST ${LIB}_FIND_COMPONENTS)
return()
endif()
find_library(${LIB}_${COMPONENT}_LIBRARY
NAMES ${ARG_NAMES}
PATHS "" ${ARG_PATHS}
HINTS "" ${ARG_HINTS}
PATH_SUFFIXES "" ${ARG_PATH_SUFFIXES}
)
mark_as_advanced(${LIB}_${COMPONENT}_LIBRARY)
if(${LIB}_${COMPONENT}_LIBRARY)
# On success, set the standard FOUND variable...
set(${LIB}_${COMPONENT}_FOUND TRUE PARENT_SCOPE)
# ... and append the library path to the LIBRARIES variable ...
list(APPEND ${LIB}_LIBRARIES
"${${LIB}_${COMPONENT}_LIBRARY}"
${ARG_INTERFACE_LINK_LIBRARIES}
)
list(REMOVE_DUPLICATES ${LIB}_LIBRARIES)
set(${LIB}_LIBRARIES ${${LIB}_LIBRARIES} PARENT_SCOPE)
# ... and create an imported target for the component, if not already
# done.
if(NOT TARGET ${LIB}::${COMPONENT})
add_library(${LIB}::${COMPONENT} UNKNOWN IMPORTED)
set_target_properties(${LIB}::${COMPONENT} PROPERTIES
IMPORTED_LOCATION "${${LIB}_${COMPONENT}_LIBRARY}"
)
set_property(TARGET ${LIB}::${COMPONENT} PROPERTY
INTERFACE_INCLUDE_DIRECTORIES ${ARG_INCLUDE_DIRS}
)
set_property(TARGET ${LIB}::${COMPONENT} PROPERTY
INTERFACE_LINK_LIBRARIES ${ARG_INTERFACE_LINK_LIBRARIES}
)
endif()
find_package_message("${LIB}_${COMPONENT}"
"Found ${LIB} component ${COMPONENT}: ${${LIB}_${COMPONENT}_LIBRARY}"
"[${${LIB}_${COMPONENT}_LIBRARY}][${ARG_INCLUDE_DIRS}]"
)
endif()
endfunction()

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