Merge pull request #415 from aduh95/patch-1

Fix build on macOS

Author: hemiao2023

src/CMakeLists.txt

@@ -366,7 +366,7 @@ else ()
 
     message("SLIC3R_RESOURCES_DIR_Mac=${SLIC3R_RESOURCES_DIR}")
     message("BIN_RESOURCES_DIR=${BIN_RESOURCES_DIR}")
-    if(APPLE)
+    if(APPLE AND TARGET_BUNDLE_CONTENT_DIR)
         add_custom_command(TARGET ${PROJECT_DLL} POST_BUILD
             COMMAND ${CMAKE_COMMAND} -E make_directory "$<TARGET_BUNDLE_CONTENT_DIR:${PROJECT_DLL}>/Resources"
             COMMAND ${CMAKE_COMMAND} -E copy_directory "${SLIC3R_RESOURCES_DIR}" "$<TARGET_BUNDLE_CONTENT_DIR:${PROJECT_DLL}>/Resources"