It succeeds after manually installing boost. Therefore the gearmand ebuild should depend on dev-libs/boost. Reproducible: Always Steps to Reproduce: emerge gearmand (without having manually installed dev-libs/boost Actual Results: checking for Boost headers version >= 1.39.0... no configure: error: cannot find Boost headers version >= 1.39.0
I can confirm this bug.
Thanks for reporting, this is fixed now.