jrosdahl/ccache — pull request #29 by jorgenpt (2013-06-08 01:44:16+00:00)
Title: Skip dependency filename options for object hash.

The filename of a dependency file doesn't have any bearing on the result, so
using it to calculate object hashes gives incorrect results.

This skips the part of:
-Wp,-MD,
-Wp,-MMD,
-MF
-MF

Also tests for this functionality.

Fixes issue jrosdahl#28.