A consumer adds its debug-only sources, the ones that import
Crafter.Debug, under the same condition Use adds the library. Testing
its own flag is not that condition: a build with the flag for a target
other than native Linux gets neither the library nor the define, and
its debug-only sources would then fail to import Crafter.Debug. Use
now returns whether it added them, and the README shows the pattern.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Jorijn van der Graaf
6da3b274a6