CORONA_PLUGIN_RESOURCES in CoronaApp.xcconfig

I’m building my app natively and the linker fails to find some frameworks that appear in the OTHER_LDFLAGS in the generated CoronaApp.xcconfig. I noticed that those “missing” frameworks are actually under the resources/frameworks in the corona plugin library directory and that those paths are defined in the CORONA_PLUGIN_RESOURCES variable in the xcconfig file. However, I don’t see that variable used anywhere in the project, and the syntax of that variable doesn’t seem to comply to a FRAMEWORK_SEARCH_PATHS variable because paths are not in quotes (they contain spaces).

Here is an example of what mine looks like:
CORONA_PLUGIN_RESOURCES[sdk=iphonesimulator*] =/Users/[USERNAME]/Library/Application Support/Corona/Native Plugins/iphone-sim/plugin.notifications.v2_com.coronalabs/resources:/Users/[USERNAME]/Library/Application Support/Corona/Native Plugins/iphone-sim/plugin.facebook.v4a_com.coronalabs/resources

My question is how is this CORONA_PLUGIN_RESOURCES supposed to be used and where?

Thanks.