opencv

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if(MSVC OR IOS OR XROS)
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  return()
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endif()
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# --------------------------------------------------------------------------------------------
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# according to man pkg-config
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#  The package name specified on the pkg-config command line is defined to
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#      be the name of the metadata file, minus the .pc extension. If a library
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#      can install multiple versions simultaneously, it must give each version
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#      its own name (for example, GTK 1.2 might have the package  name  "gtk+"
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#      while GTK 2.0 has "gtk+-2.0").
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#
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# ${BIN_DIR}/unix-install/opencv.pc -> For use *with* "make install"
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# -------------------------------------------------------------------------------------------
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macro(fix_prefix lst isown)
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  set(_lst)
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  foreach(item ${${lst}})
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    if(DEFINED TARGET_LOCATION_${item})
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      set(item "${TARGET_LOCATION_${item}}")
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      if(${isown})
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        get_filename_component(item "${item}" NAME)
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        ocv_get_libname(item "${item}")
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      endif()
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    endif()
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    if(item MATCHES "^-l")
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      list(APPEND _lst "${item}")
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    elseif(item MATCHES "^-framework") # MacOS framework (assume single entry "-framework OpenCL")
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      list(APPEND _lst "${item}")
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    elseif(item MATCHES "[\\/]")
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      get_filename_component(libdir "${item}" PATH)
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      get_filename_component(_libname "${item}" NAME)
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      ocv_get_libname(libname "${_libname}")
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      list(APPEND _lst "-L${libdir}" "-l${libname}")
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    else()
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      list(APPEND _lst "-l${item}")
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    endif()
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  endforeach()
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  set(${lst} ${_lst})
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  unset(_lst)
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endmacro()
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if(NOT DEFINED CMAKE_HELPER_SCRIPT)
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if(INSTALL_TO_MANGLED_PATHS)
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  ocv_update(OPENCV_PC_FILE_NAME "opencv-${OPENCV_VERSION}.pc")
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else()
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  ocv_update(OPENCV_PC_FILE_NAME opencv4.pc)
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endif()
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# build the list of opencv libs and dependencies for all modules
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ocv_get_all_libs(_modules _extra _3rdparty)
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#build the list of components
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# Note:
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#   when linking against static libraries, if libfoo depends on libbar, then
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#   libfoo must come first in the linker flags.
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# world is a special target whose library should come first,
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# especially for static link.
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if(_modules MATCHES "opencv_world")
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  set(_modules "opencv_world")
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endif()
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set(HELPER_SCRIPT "")
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ocv_cmake_script_append_var(HELPER_SCRIPT
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    BUILD_SHARED_LIBS
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    CMAKE_BINARY_DIR
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    CMAKE_INSTALL_PREFIX
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    OpenCV_SOURCE_DIR
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    OPENCV_PC_FILE_NAME
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    OPENCV_VERSION_PLAIN
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    OPENCV_LIB_INSTALL_PATH
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    OPENCV_INCLUDE_INSTALL_PATH
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    OPENCV_3P_LIB_INSTALL_PATH
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    _modules
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    _extra
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    _3rdparty
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)
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foreach(item ${_modules} ${_extra} ${_3rdparty})
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  if(TARGET ${item})
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    set(HELPER_SCRIPT "${HELPER_SCRIPT}
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set(TARGET_LOCATION_${item} \"$<TARGET_FILE:${item}>\")
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")
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  endif()
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endforeach()
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set(CMAKE_HELPER_SCRIPT "${CMAKE_BINARY_DIR}/OpenCVGenPkgConfig.info.cmake")
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file(GENERATE OUTPUT "${CMAKE_HELPER_SCRIPT}" CONTENT "${HELPER_SCRIPT}")
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add_custom_target(developer_scripts)
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add_custom_command(
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  OUTPUT "${CMAKE_BINARY_DIR}/unix-install/${OPENCV_PC_FILE_NAME}"
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  COMMAND ${CMAKE_COMMAND} "-DCMAKE_HELPER_SCRIPT=${CMAKE_HELPER_SCRIPT}" -P "${OpenCV_SOURCE_DIR}/cmake/OpenCVGenPkgconfig.cmake"
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  DEPENDS "${CMAKE_BINARY_DIR}/OpenCVGenPkgConfig.info.cmake"
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          "${OpenCV_SOURCE_DIR}/cmake/OpenCVGenPkgconfig.cmake"
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  COMMENT "Generate ${OPENCV_PC_FILE_NAME}"
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)
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add_custom_target(gen-pkgconfig ALL SOURCES "${CMAKE_BINARY_DIR}/unix-install/${OPENCV_PC_FILE_NAME}")
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add_dependencies(developer_scripts gen-pkgconfig)
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if((UNIX AND NOT ANDROID) OR MINGW)
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  install(FILES ${CMAKE_BINARY_DIR}/unix-install/${OPENCV_PC_FILE_NAME} DESTINATION ${OPENCV_LIB_INSTALL_PATH}/pkgconfig COMPONENT dev)
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endif()
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# =============================================================================
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else() # DEFINED CMAKE_HELPER_SCRIPT
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cmake_minimum_required(VERSION 2.8.12.2)
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cmake_policy(SET CMP0012 NEW)
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include("${CMAKE_HELPER_SCRIPT}")
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include("${OpenCV_SOURCE_DIR}/cmake/OpenCVUtils.cmake")
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fix_prefix(_modules 1)
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fix_prefix(_extra 0)
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fix_prefix(_3rdparty 1)
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ocv_list_unique(_modules)
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ocv_list_unique(_extra)
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ocv_list_unique(_3rdparty)
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set(OPENCV_PC_LIBS
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  "-L\${exec_prefix}/${OPENCV_LIB_INSTALL_PATH}"
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  "${_modules}"
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)
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if(BUILD_SHARED_LIBS)
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  set(OPENCV_PC_LIBS_PRIVATE "${_extra}")
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else()
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  set(OPENCV_PC_LIBS_PRIVATE
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    "-L\${exec_prefix}/${OPENCV_3P_LIB_INSTALL_PATH}"
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    "${_3rdparty}"
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    "${_extra}"
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  )
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endif()
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string(REPLACE ";" " " OPENCV_PC_LIBS "${OPENCV_PC_LIBS}")
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string(REPLACE ";" " " OPENCV_PC_LIBS_PRIVATE "${OPENCV_PC_LIBS_PRIVATE}")
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#generate the .pc file
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set(prefix      "${CMAKE_INSTALL_PREFIX}")
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set(exec_prefix "\${prefix}")
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set(libdir      "\${exec_prefix}/${OPENCV_LIB_INSTALL_PATH}")
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set(includedir  "\${prefix}/${OPENCV_INCLUDE_INSTALL_PATH}")
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configure_file("${OpenCV_SOURCE_DIR}/cmake/templates/opencv-XXX.pc.in"
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               "${CMAKE_BINARY_DIR}/unix-install/${OPENCV_PC_FILE_NAME}"
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               @ONLY)
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endif() # DEFINED CMAKE_HELPER_SCRIPT
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