I read this in a comment: # gnome2_src_compile automatically sets debug IUSE flag econf $myconf --disable-gnome || die "econf im-ja failed" Did you try to set "GCONF_DEBUG=no" at the top of ebuild?
+*im-ja-1.5-r3 (01 Jun 2014) + + 01 Jun 2014; Pacho Ramos <pacho@gentoo.org> + +files/im-ja-1.5-underlinking.patch, +im-ja-1.5-r3.ebuild, + -im-ja-1.5-r1.ebuild, -im-ja-1.5.ebuild: + Use gnome2.eclass, readme.gentoo, drop support for old gnome-panel and fix + underlinking (#510784, #510786, #510790, #510792), drop old +