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Re: AC_PROG_YACC: use bison -o

From: Paul Eggert
Subject: Re: AC_PROG_YACC: use bison -o
Date: Tue, 19 Mar 2013 11:20:38 -0700
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130311 Thunderbird/17.0.4

Thanks, I installed that into Autoconf with a slightly terser NEWS entry:

- AC_PROG_YACC now uses 'bison -o' instead of 'bison -y', so that
  by default it no longer warns about Bison extensions.  Add -Wyacc to
  YFLAGS to enable these warnings.

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