[Mesa-dev] [PATCH] configure.ac: add and use AC_PROG_BISON/FLEX macros

[Eric Anholt]

On Wed, 11 Jan 2012 01:16:18 -0500, Matt Turner <mattst88 at gmail.com> wrote:
> Defining these macros lets us use AC_PROG_YACC/LEX which makes automake
> easier while still specifically requiring bison and flex.
> 
> Based on bison.m4 and flex.m4 found in LLVM's tree.

Copying stuff from their tree without noting the license? :(
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