sys-block/thin-provisioning-tools-0.2.8-r1 fails with: persistent-data/data-structures/bitset.cc:201:1: error: reference to ‘bitset’ is ambiguous build log attached. Workaround: USE="-thin" (Thank you DrEvil)
Created attachment 375514 [details] Build Log
I had the same error on r1 and r2 emerged just fine.
Forcing the -r2 version resolves this, but I run 'stable' systems and the -r1 is marked x86, but -r2 is marked ~x86 ... This needs to be bumped to -r3 and marked 'x86' to push the fix for stable systems.
*** This bug has been marked as a duplicate of bug 491364 ***