precompiled header name gets stuck

Question

I'm new to xcode and I must be missing something.

Create a new command-line project. Call it tempprog (for instance).
Select Project/Edit Project Settings.
Edit the name of the prefix header (tempprog_Prefixz.pch).
Build - it will fail, of course, looking for tempprog_Prefixz.pch
Now change the name of the prefix header back to tempprog_Prefix.pch.
Build again - it should work, but doesn't. It's still looking for tempprog_Prefixz.pch

Cleaning does not rectify the situation. What am I missing here? Where is the Prefixz.pch name being retained? If you look in the build output at the ProcessPCH command you can see that it still wants to use Prefixz.

Answer 1

It turns out there's a system of setting priorities.

From Working With Xcode Build Settings:

The levels at which build settings can be set, and their precedences are:

xcodebuild command-line flags (only applicable for command-line builds) The target, editable via a target's Info inspector The project, editable via a project's Info inspector Xcode application settings, as set in Xcode > Preferences... Xcode's built in defaults The user environment, perhaps as set in a user's ~/.MacOSX/environment.plist file