regression on -current with speech-dispatcher

speech-dispatcher doesn't build anymore on -current,see errors below:
-------------------------
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
from /usr/include/glib-2.0/glib/gthread.h:32,
from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
from /usr/include/glib-2.0/glib.h:32,
from module_utils.h:31,
from kali.cpp:37:
/usr/include/c++/10.2.0/type_traits:2930:3: error: template with C linkage
2930 | template<typename _Fn, typename... _Args>
| ^~~~~~~~
kali.cpp:28:1: note: 'extern "C"' linkage started here
28 | extern "C" {
| ^~~~~~~~~~
make[3]: *** [Makefile:1171: sd_kali-kali.o] Error 1
make[3]: Leaving directory '/tmp/speech-dispatcher-0.10.2/src/modules'
make[2]: *** [Makefile:452: all-recursive] Error 1
make[2]: Leaving directory '/tmp/speech-dispatcher-0.10.2/src'
make[1]: *** [Makefile:586: all-recursive] Error 1
make[1]: Leaving directory '/tmp/speech-dispatcher-0.10.2'
make: *** [Makefile:474: all] Error 2
-------------------------------
same culprit glib2-2.68.0, downgrading solves the problem.