When compiling CVS HEAD on mips-linux-gnu, I get the following errors:

gcc -DHAVE_CONFIG_H -I. -I../../gas -I. -D_GNU_SOURCE -I. -I../../gas -I../bfd
-I../../gas/config -I../../gas/../include -I../../gas/.. -I../../gas/../bfd
-I../../gas/../intl -I../intl -DLOCALEDIR="\"/usr/share/locale\""   -W -Wall
-Wstrict-prototypes -Wmissing-prototypes -Werror -g -O2 -c itbl-lex.c
cc1: warnings being treated as errors
itbl-lex.c:1694: warning: no previous prototype for 'yyget_lineno'
itbl-lex.c:1703: warning: no previous prototype for 'yyget_in'
itbl-lex.c:1711: warning: no previous prototype for 'yyget_out'

This is a regression from 2.16.1.

The compiler is: gcc (GCC) 4.0.2 20050821 (prerelease) (Debian 4.0.1-6)
This is on Debian unstable.

------- Additional Comment #1 From H.J. Lu 2005-09-12 20:49 -------

It could be a flex bug. I am using flex-2.5.4a-29 on RHEL 3 and have no
problem.

------- Additional Comment #2 From Jim Gifford 2005-09-12 22:06 -------

Created an attachment (id=659)
Fixes Flex Warning in binutils

------- Additional Comment #3 From Jim Gifford 2005-09-12 22:08 -------

I have attached a patch I just sent HJL to fix the issue. This issue is 
similar to the one reported before.
http://sources.redhat.com/ml/binutils/2005-03/msg00694.html

------- Additional Comment #4 From Ben Elliston 2006-03-29 05:55 -------

Fixed by:

2005-11-01  Thiemo Seufer  <ths@networkno.de>

        PR gas/1299
        * Makefile.am: Disable -Werror for the itbl-lex.o rule.
        * Makefile.in: Regenerate.

If there are continued problems with the code generated by flex, we should work
to get those corrected in flex itself.