99 lines
4.1 KiB
CMake
99 lines
4.1 KiB
CMake
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################################################################################
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# WARNING: to list the system libraries(ie IMPORTED) you MUST set:
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# set_target_properties(your_lib PROPERTIES IMPORTED_GLOBAL TRUE)
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# just after the find_package call
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# cf https://gitlab.kitware.com/cmake/cmake/-/issues/17256
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#
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# https://stackoverflow.com/questions/32756195/recursive-list-of-link-libraries-in-cmake
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# https://stackoverflow.com/questions/32197663/how-can-i-remove-the-the-location-property-may-not-be-read-from-target-error-i
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function(_get_link_libraries OUTPUT_LIST TARGET)
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list(APPEND VISITED_TARGETS ${TARGET})
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# DO NOT switch on IMPORTED or not
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# An INTERFACE library CAN have LINK_LIBRARIES!
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# get_target_property(IMPORTED ${TARGET} IMPORTED)
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set(LIBS "")
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get_target_property(LIBS_1 ${TARGET} INTERFACE_LINK_LIBRARIES)
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get_target_property(LIBS_2 ${TARGET} LINK_LIBRARIES)
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list(APPEND LIBS ${LIBS_1} ${LIBS_2})
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set(LIB_FILES "")
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foreach(LIB ${LIBS})
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if (TARGET ${LIB})
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list(FIND VISITED_TARGETS ${LIB} VISITED)
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if (${VISITED} EQUAL -1)
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# OLD: get_target_property(LIB_FILE ${LIB} LOCATION)
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# NEW:
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_get_link_libraries(LINK_LIB_FILES ${LIB})
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set(LIB_FILE ${LIB})
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list(APPEND LIB_FILES ${LINK_LIB_FILES})
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list(APPEND LIB_FILES ${LIB_FILE})
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endif()
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elseif(EXISTS ${LIB})
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set(LIB_FILE ${LIB})
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list(APPEND LIB_FILES ${LIB_FILE})
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endif()
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endforeach()
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set(VISITED_TARGETS ${VISITED_TARGETS} PARENT_SCOPE)
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set(${OUTPUT_LIST} ${LIB_FILES} PARENT_SCOPE)
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endfunction()
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################################################################################
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function(export_all_target_libs TARGET)
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# NOTE: get_target_property(CIRCUIT_LIB_LINK_LIBRARIES a_target LINK_LIBRARIES) is NOT transitive
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# This function will return eg: "$<TARGET_FILE:rust_cxx>;$<TARGET_FILE:circuit_lib>;"
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# b/c generator expression are evaluated LATER
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# cf https://stackoverflow.com/questions/59226127/cmake-generator-expression-how-to-get-target-file-property-on-list-of-targets
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set(ALL_LINK_LIBRARIES "")
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_get_link_libraries(ALL_LINK_LIBRARIES ${TARGET})
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message(STATUS "ALL_LINK_LIBRARIES : ${ALL_LINK_LIBRARIES}")
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set(ALL_LIBS "")
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set(ALL_EXTERNAL_LIBS "")
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# TODO move that back into get_link_libraries
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# NOTE: we MUST do it in 2 steps:
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# - collect all the LINK_LIBRARIES recursively
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# - loop on those and get their TARGET_FILE (if not INTERFACE_LIBRARY)
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# That is b/c in get_link_libraries a INTERFACE_LIBRARY CAN have link_libraries
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# but we CAN NOT evaluate generator expressions at this time.
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foreach(LIB ${ALL_LINK_LIBRARIES})
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# MUST skip INTERFACE else:
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# CMake Error at src/CMakeLists.txt:136 (add_custom_command):
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# Error evaluating generator expression:
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# $<TARGET_FILE:rust_cxx>
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# Target "rust_cxx" is not an executable or library.
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# SHARED_LIBRARY,INTERFACE_LIBRARY,STATIC_LIBRARY
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#
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if (TARGET ${LIB})
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get_target_property(LIB_TYPE ${LIB} TYPE)
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message(STATUS "LIB_TYPE : ${LIB} = ${LIB_TYPE}")
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if(NOT ${LIB_TYPE} STREQUAL "INTERFACE_LIBRARY")
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set(LIB_FILE $<TARGET_FILE:${LIB}>)
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list(APPEND ALL_LIBS ${LIB_FILE})
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endif()
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elseif(EXISTS ${LIB})
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set(LIB_FILE ${LIB})
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message(STATUS "LIB_TYPE : ${LIB} = EXTERNAL")
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list(APPEND ALL_LIBS ${LIB_FILE})
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endif()
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endforeach() # LIB ${ALL_LIBS}
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message(STATUS "ALL_LIBS : ${ALL_LIBS}")
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# add_custom_command(ie echoing only to stdout) works but more difficult to get from build.rs
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# b/c when there is "ninja: no work to do" it will NOT echo on the console
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add_custom_command(
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TARGET ${TARGET}
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POST_BUILD
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COMMAND ${CMAKE_COMMAND} -E echo ${ALL_LIBS} > ${CMAKE_CURRENT_BINARY_DIR}/cmake_generated_libs
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# OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/cmake_generated_libs
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VERBATIM
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)
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endfunction(export_all_target_libs)
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