In file included from /usr/src/lib/libc/stdio/local.h:43,
                 from /usr/src/lib/libc/stdio/stdio.c:51:
/usr/src/lib/libc/../../include/wchar.h:216: error: syntax error before "mbstate"
/usr/src/lib/libc/../../include/wchar.h:216: error: stray '\127' in program
*** Error code 1

Stop in /usr/src/lib/libc.
*** Error code 1

Stop in /usr/src/lib.