Xcode 9 “could not build module ‘Foundation’”

Question

When I archive an iPhone project, it returns a failure:

Could not build module \"Foundation\".

However, when I debug on the iPho

Answer 1

This happened to me after trying to build a third party library. It made a symbolic link in the iPhoneOS.sdk/usr/include to a non-existent header file in iPhoneSimulator.sdk/usr/include.

After deleting the bad symbolic link, Xcode started building correctly again.