[PATCH] D73846: [PCH] make sure to not warn about unused macros from -D

[Richard Smith - zygoloid via Phabricator via cfe-commits]

rsmith accepted this revision.
rsmith added a comment.
This revision is now accepted and ready to land.

Looks OK as a workaround. Do you know why we consider these to be in the main file? If we could fix that in the source manager, that'd seem preferable.


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