this answer didn't solved:
‘ld: warning: directory not found for option’
after switching from old Xcode to new one an iOS 8 app, on my new mac I got
ld: warning: directory not found for option '-F/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS9.1.sdk/Developer/Library/Frameworks'
I tried creating the missing folder, but I still have a problem of strange incomplete autocomplete as frameworks were not there