When compiled with USE flag "metis" on, the ebuild doesn't installs "cholmod_partition.h", the header related to that useflag. This causes compilation failures in the apps depending on this package, like sci-mathematics/octave-3.0.1 (in the science overlay now, coming to the tree in the next few weeks). The fix is easy and stupid: in the patch for the ebuild, cholmod-1.6.0-autotools.patch, line 617, change $(PARTITIOn) to $(PARTITION) I can attach a patch if necessary. Reproducible: Always
Fixed in cvs, should hit the mirrors soon. Thanks for reporting and tracking down the issue for us.