Не собирается glib20

./.libs/libglib-2.0.so: undefined reference to `__sync_fetch_and_or_4'
./.libs/libglib-2.0.so: undefined reference to `__sync_bool_compare_and_swap_4'
./.libs/libglib-2.0.so: undefined reference to `__sync_fetch_and_sub_4'
./.libs/libglib-2.0.so: undefined reference to `__sync_fetch_and_add_4'
./.libs/libglib-2.0.so: undefined reference to `__sync_fetch_and_and_4'
./.libs/libglib-2.0.so: undefined reference to `__sync_fetch_and_xor_4'
gmake[4]: *** [gtester] Error 1
gmake[4]: Leaving directory `/usr/ports/devel/glib20/work/glib-2.36.3/glib'
gmake[3]: *** [all-recursive] Error 1
gmake[3]: Leaving directory `/usr/ports/devel/glib20/work/glib-2.36.3/glib'
gmake[2]: *** [all] Error 2
gmake[2]: Leaving directory `/usr/ports/devel/glib20/work/glib-2.36.3/glib'
gmake[1]: *** [all-recursive] Error 1
gmake[1]: Leaving directory `/usr/ports/devel/glib20/work/glib-2.36.3'
gmake: *** [all] Error 2
*** Error code 1

Stop in /usr/ports/devel/glib20.
*** Error code 1

Stop in /usr/ports/devel/glib20.

Лечится обновлением gcc (из портов /usr/ports/lang/gcc) и прописыванием в make.conf

USE_GCC=4.6