[Bug bootstrap/70704] [6 Regression] AIX bootstrap comparison failure

[dje at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70704

--- Comment #35 from David Edelsohn <dje at gcc dot gnu.org> ---
Flex 2.6.0 works with --enable-checking=yes, but may not work with
--enable-checking=release.  I believe that Flex may be the culprit.  If the
current bootstrap confirms that, I am going to bootstrap with gengtype-lex.c
compiled with -fsigned-char.