build: don't require flex for ordinary builds
authorPaul Eggert <eggert@cs.ucla.edu>
Sun, 25 Aug 2013 01:22:22 +0000 (18:22 -0700)
committerPaul Eggert <eggert@cs.ucla.edu>
Sun, 25 Aug 2013 01:22:44 +0000 (18:22 -0700)
commitb5e27aa2625c1f84ea1ee75fe74374341664a759
treeffa4156841521b5f7859ba9c8b1009f2cefcc42e
parent0149d39e6e5cb4384c07d92c00908d0099d5e009
build: don't require flex for ordinary builds

* configure.ac (LEX): Don't fail if this is lex, as flex is not
required for ordinary builds.  Instead, issue a warning and
substitute a no-op LEX.  Reported by Michael Felt in
<http://lists.gnu.org/archive/html/bug-bison/2013-08/msg00009.html>.
configure.ac