I added sys-devel/clang to package.provided and llvm-3.7.1[clang,-static-analyzer] seems to buld and work fine. Reproducible: Always
commit a9e515ed80ec06dc7c958f96d6317f57b99765a2 Author: Michał Górny <mgorny@gentoo.org> Date: Sun Jan 17 18:02:50 2016 sys-devel/clang: Fix static-analyzer usedep, #572094 Thanks for the report.