"Cannot find member in the struct" build failure(s) — clang 11.0.0

PackageVersionSupposed error messageFull log Bug report
aegisub 3.2.2+dfsg-6util.cpp:30:2: error: no member named 'this_thread' in namespace 'std'; did you mean 'boost::this_thread'? Log
cgit 1.2.3+git2.25.1-1../filter.c:388:10: error: no member named '__fprintf_chk' in 'struct cgit_filter' Log
mercator 0.3.3-6polygon_intersect.h:667:37: error: no member named 'm_orient' in 'WFMath::Polygon<2>' Log
openvswitch 2.13.0+dfsg1-12../lib/vlog.c:1127:35: error: no member named '__syslog_chk' in 'struct syslog_class' Log
stimfit 0.16.0-1./funclib.cpp:165:20: error: no member named 'logl' in namespace 'std'; did you mean simply 'logl'? Log

5 errors