I got a lot of warning relating to "No such file or directory" and "Could not resolve external type" when integrating FB Audience Network to my app.
This method: https://forums.developer.apple.com/thread/17921 does NOT work for me.
The only way to clear the warning is changing Debug Information Format (DEBUG_INFORMATION_FORMAT) = DWARF. But I need DSym to track the crash report.
Do you guys have any solution ? if not... is it OK to ignore the warning ?
Thanks for reading my question.
The warnings appear to be a known issue with recent Xcode versions (see http://fortheloveoftech.com/2015/06/08/apple-releases-xcode-7-beta/) - dsymutil may print warnings about unresolved external types when compiling C++ projects with precompiled headers. These should be harmless.
来源：https://stackoverflow.com/questions/34259387/facebook-audience-network-with-too-many-warnings-on-xcode-7