Gentoo's Bugzilla –
Attachment 781376 Details for
Bug 848420sys-block/gparted-1.4.0 - In static member function 'static Glib::ustring GParted::BCache_Info::get_bcache_device(const Glib::ustring&, const Glib::ustring&)': BCache_Info.cc:52:40: error: 'basename' was not declared in this scope (on musl)