Gentoo's Bugzilla –
Attachment 602708 Details for
Bug 704908dev-cpp/glibmm-2.60.1 - In file included from .../work/glibmm-2.60.1/glib/glibmm/checksum.cc:4: /usr/include/sigc++-2.0/sigc++/signal_base.h:24:10: fatal error: sigc++config.h: No such file or directory