use of undeclared identifier 'DW_LANG_C11'

From: bob prohaska <fbsd_at_www.zefox.net> Date: Sat, 9 Jun 2018 13:07:24 -0700 · This archive was generated by hypermail 2.4.0 : Wed May 19 2021 - 11:41:16 UTC

I'm seeing persistent 
--- dwarf.o ---
/usr/src/cddl/contrib/opensolaris/tools/ctf/cvt/dwarf.c:1980:8: error: use of undeclared identifier 'DW_LANG_C11'
                case DW_LANG_C11:
                     ^
errors very early in buildworld attempts on 334890 

I've tried "make clean" in /usr/src to no avail, is there something else
to try, or should I just wait for a source update?

Thanks for reading,

bob prohaska