cmake: add METIS imported targets

Author: andrea-iob

CMakeLists.txt

@@ -126,8 +126,7 @@ function(configureBitpitTargetDependencies TARGET_NAME DEPENDENCIES_SCOPE)
     endif()
 
     if (METIS_FOUND)
-        target_link_libraries(${TARGET_NAME} ${DEPENDENCIES_SCOPE} ${METIS_LIBRARIES})
-        target_include_directories(${TARGET_NAME} ${DEPENDENCIES_SCOPE} ${METIS_INCLUDE_DIRS})
+        target_link_libraries(${TARGET_NAME} ${DEPENDENCIES_SCOPE} METIS::METIS)
 
         target_compile_definitions(${BITPIT_LIBRARY} ${DEPENDENCIES_SCOPE} "BITPIT_ENABLE_METIS=1")
     else()

external/METIS/cmake/FindMETIS.cmake

@@ -332,3 +332,59 @@ find_package_handle_standard_args(METIS DEFAULT_MSG
 #
 # TODO: Add possibility to check for specific functions in the library
 #
+
+#-----------------------------------------------------------------------------
+# Create imported target
+#-----------------------------------------------------------------------------
+if (NOT TARGET METIS::METIS)
+    set(METIS_LIBRARY_TARGETS "")
+    foreach(LIBRARY_PATH ${METIS_LIBRARIES})
+        get_filename_component(LIBRARY_FILENAME "${LIBRARY_PATH}" NAME)
+        get_filename_component(LIBRARY_EXTENSION "${LIBRARY_PATH}" LAST_EXT)
+
+        string(REGEX REPLACE "\\.[^.]*$" "" LIBRARY_TARGET "${LIBRARY_FILENAME}")
+        string(REGEX REPLACE "^lib" "" LIBRARY_TARGET "${LIBRARY_TARGET}")
+        set(LIBRARY_TARGET "METIS::${LIBRARY_TARGET}_library")
+
+        if (LIBRARY_EXTENSION STREQUAL ".a")
+            set(TARGET_TYPE "STATIC")
+            set(TARGET_IMPORTED_LOCATION "${LIBRARY_PATH}")
+        elseif (LIBRARY_EXTENSION STREQUAL ".lib")
+            get_filename_component(LIBRARY_BASENAME "${LIBRARY_FILENAME}" NAME_WE)
+            get_filename_component(LIBRARY_DIRECTORY "${LIBRARY_PATH}" DIRECTORY)
+            set(LIBRARY_DLL_SEARCH_PATHS
+                "${LIBRARY_DIRECTORY}"
+                "${LIBRARY_DIRECTORY}/../bin"
+                "${LIBRARY_DIRECTORY}/../../bin"
+            )
+
+            set(TARGET_TYPE "STATIC")
+            set(TARGET_IMPORTED_LOCATION "${LIBRARY_PATH}")
+            foreach(LIBRARY_DLL_SEARCH_PATH IN LISTS LIBRARY_DLL_SEARCH_PATHS)
+                set(CANDIDATE_LIBRARY_DLL_PATH "${LIBRARY_DLL_SEARCH_PATH}/${LIBRARY_BASENAME}.dll")
+                if(EXISTS "${CANDIDATE_LIBRARY_DLL_PATH}")
+                    set(TARGET_TYPE "SHARED")
+                    set(TARGET_IMPORTED_LOCATION "${CANDIDATE_LIBRARY_DLL_PATH}")
+                    break()
+                endif()
+            endforeach()
+        elseif (LIBRARY_EXTENSION STREQUAL ".so")
+            set(TARGET_TYPE "SHARED")
+            set(TARGET_IMPORTED_LOCATION "${LIBRARY_PATH}")
+        elseif (LIBRARY_EXTENSION STREQUAL ".dll")
+            set(TARGET_TYPE "SHARED")
+            set(TARGET_IMPORTED_LOCATION "${LIBRARY_PATH}")
+        endif()
+
+        add_library(${LIBRARY_TARGET} ${TARGET_TYPE} IMPORTED)
+        set_target_properties(${LIBRARY_TARGET} PROPERTIES IMPORTED_LOCATION ${TARGET_IMPORTED_LOCATION})
+        if (WIN32 AND TARGET_TYPE STREQUAL "SHARED")
+            set_target_properties(${LIBRARY_TARGET} PROPERTIES IMPORTED_IMPLIB "${LIBRARY_PATH}")
+        endif()
+        set_target_properties(${LIBRARY_TARGET} PROPERTIES INTERFACE_INCLUDE_DIRECTORIES "${METIS_INCLUDE_DIRS}")
+        list(APPEND METIS_LIBRARY_TARGETS ${LIBRARY_TARGET})
+    endforeach()
+
+    add_library(METIS::METIS INTERFACE IMPORTED)
+    set_target_properties(METIS::METIS PROPERTIES INTERFACE_LINK_LIBRARIES "${METIS_LIBRARY_TARGETS}")
+endif()