Gentoo's Bugzilla –
Attachment 569388 Details for
Bug 680628app-crypt/gcr - In file included from gck/gck-mock.c:22: /usr/include/glib-2.0/glib/gtypes.h: In function ‘_GLIB_CHECKED_ADD_U64’: /usr/include/glib-2.0/glib/gmacros.h:277:53: error: size of array ‘_GStaticAssertCompileTimeAssertion_0’ is negative