[Qt-creator] project file, local defines?

[Campbell Barton]

>From what I can tell the only way to add defines to a qtcreator
project file is like this:
MyProject.config
---
// ADD PREDEFINED MACROS HERE!
#define TEST
---

The issue is defines are not global, they are per file though
per-directory would be good enough for my use.

I was wondering if there was a way to set defines so they are not set
for the whole project.

-- 
- Campbell