Paul Eggert b5e27aa262 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>.

2013-08-24 18:22:44 -07:00

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