You receive this bug because this package installs '.a' file which should be handled by static-libs IUSE. Please also punt the '.la' file if they are not needed. From 'qlist -e ${package}': /usr/lib64/libaggplatformX11.a /usr/lib64/libaggfontfreetype.a /usr/lib64/libagg.a /usr/lib64/libaggplatformsdl.a /usr/lib64/libagggpc.a /usr/lib64/libagg.so /usr/lib64/libagg.so.2.0.4 /usr/lib64/libagg.so.2 /usr/lib64/libaggplatformsdl.so.2 /usr/lib64/libaggplatformX11.so.2.0.4 /usr/lib64/libagggpc.so.2.0.4 /usr/lib64/libaggplatformsdl.so /usr/lib64/libaggplatformX11.so /usr/lib64/libaggplatformX11.so.2 /usr/lib64/libaggplatformsdl.so.2.0.4 /usr/lib64/libagggpc.so /usr/lib64/libaggfontfreetype.so.2 /usr/lib64/libagggpc.so.2 /usr/lib64/libaggfontfreetype.so.2.0.4 /usr/lib64/libaggfontfreetype.so /usr/lib64/libaggplatformsdl.la /usr/lib64/libaggplatformX11.la /usr/lib64/libagggpc.la /usr/lib64/libaggfontfreetype.la /usr/lib64/libagg.la
fixed in -r3