Hi! I can't emerge media-tv/v4l-utils-1.22.1.

In file included from v4l2-ctl-streaming.cpp:14:
../../utils/common/v4l2-tpg.h: In function ‘void tpg_s_hue(tpg_data*, s16)’:
../../utils/common/v4l2-tpg.h:49:9: error: ‘typeof’ was not declared in this scope
   49 |         typeof(val) __val = (val);