[A] Add cmake package files to installation phase

lib/CMakeLists.txt

@@ -32,7 +32,8 @@ endif()
 include(GNUInstallDirs)
 install(
     TARGETS fort
-    EXPORT  LibFort
+    EXPORT ${PROJECT_NAME}-targets
+    INCLUDES DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
     LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
     ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
     RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
@@ -48,8 +49,33 @@ install(
     DESTINATION lib/pkgconfig
 )
 
+include(CMakePackageConfigHelpers)
+configure_package_config_file(
+    ${CMAKE_CURRENT_SOURCE_DIR}/../cmake/${PROJECT_NAME}-config.cmake.in
+    ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}-config.cmake
+    INSTALL_DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}"
+)
+write_basic_package_version_file(
+    ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}-config-version.cmake
+    COMPATIBILITY SameMajorVersion
+)
 install(
-    EXPORT LibFort
-    NAMESPACE LibFort::
+    FILES
+        ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}-config.cmake
+        ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}-config-version.cmake
     DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}
 )
+
+install(
+    EXPORT ${PROJECT_NAME}-targets
+    FILE ${PROJECT_NAME}-targets.cmake
+    NAMESPACE ${PROJECT_NAME}::
+    DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}
+)
+
+export(
+	TARGETS fort 
+	NAMESPACE ${PROJECT_NAME}::
+	FILE ${PROJECT_NAME}-exports.cmake
+)
+