Ensure that dependencies of runtime plugins are included in the DLL copy

cmake/macros/CopyDllsBesideWindowsExecutable.cmake

@@ -18,12 +18,19 @@ macro(COPY_DLLS_BESIDE_WINDOWS_EXECUTABLE)
       @ONLY
     )
     
+    if (APPLE) 
+        set(PLUGIN_PATH "interface.app/Contents/MacOS/plugins")
+    else()
+        set(PLUGIN_PATH "plugins")
+    endif()
+    
     # add a post-build command to copy DLLs beside the executable
     add_custom_command(
       TARGET ${TARGET_NAME}
       POST_BUILD
       COMMAND ${CMAKE_COMMAND}
         -DBUNDLE_EXECUTABLE=$<TARGET_FILE:${TARGET_NAME}>
+        -DBUNDLE_PLUGIN_DIR=$<TARGET_FILE_DIR:${TARGET_NAME}>/${PLUGIN_PATH}
         -P ${CMAKE_CURRENT_BINARY_DIR}/FixupBundlePostBuild.cmake
     )
     

cmake/templates/FixupBundlePostBuild.cmake.in

@@ -41,4 +41,16 @@ function(copy_resolved_item_into_bundle resolved_item resolved_embedded_item)
 endfunction()
 
 message(STATUS "FIXUP_LIBS for fixup_bundle called for bundle ${BUNDLE_EXECUTABLE} are @FIXUP_LIBS@")
-fixup_bundle("${BUNDLE_EXECUTABLE}" "" "@FIXUP_LIBS@")
+
+message(STATUS "Scanning for plugins from ${BUNDLE_PLUGIN_DIR}")
+
+if (APPLE)
+    set(PLUGIN_EXTENSION "dylib")
+elseif (WIN32) 
+    set(PLUGIN_EXTENSION "dll")
+else() 
+    set(PLUGIN_EXTENSION "so")
+endif()
+
+file(GLOB RUNTIME_PLUGINS "${BUNDLE_PLUGIN_DIR}/*.${PLUGIN_EXTENSION}")
+fixup_bundle("${BUNDLE_EXECUTABLE}" "${RUNTIME_PLUGINS}" "@FIXUP_LIBS@")