checking for db.h... yes checking Berkeley Database library version... 4.0 checking for db_env_create in -ldb-4.0... no checking for db_env_create in -ldb4... no configure: error: db.h reports Berkeley DB version is 4.0 but no db-4.0 library exists !!! ERROR: net-p2p/dc-gui-0.75 failed. !!! Function econf, Line 339, Exitcode 1 !!! econf failed db is installed: [ebuild R ] sys-libs/db-4.0.14-r2
this was fixed in unstable but i guess since 4.0.x is now stable we need to move them to stable too ;)