Compiling current libc I get warnings (treated as errors by default)
compiling nslexer.c:

cc1: warnings being treated as errors
/dev/stdout: In function `_nsyylex':
/dev/stdout:709: warning: label `find_rule' defined but not used
/dev/stdout: At top level:
/dev/stdout:1679: warning: `yy_flex_realloc' defined but not used

nslexer.c is automatically generated from nslexer.l

Do I have an old lex or something or are we being too stringent with
error checking?

Ian