use of undeclared identifier 'DW_LANG_C11'

[bob prohaska]

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