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Re: [PATCH] Revert 'Fix logic error in _AC_PROG_LEX_YYTEXT_DECL (#109320

From: Zack Weinberg
Subject: Re: [PATCH] Revert 'Fix logic error in _AC_PROG_LEX_YYTEXT_DECL (#109320)'
Date: Thu, 16 Jul 2020 09:08:23 -0400

On Thu, Jul 16, 2020 at 7:21 AM Ross Burton <> wrote:
> Commit 8173e5, 'Fix logic error in _AC_PROG_LEX_YYTEXT_DECL (#109320)',
> causes AC_PROG_LEX to always fail when searching for a lex library.

Before we give up on this patch I'd like to understand the conditions
under which it fails.  I did test it extensively on my computer, with
several different permutations of libl.{a,so} and libfl.{a,so}
available.  It would help if you could tell me as much as possible of
the following:

- the config.log from a configure invocation where AC_PROG_LEX failed
- where I can find the from which that configure script
was generated
- the operating system where you observed AC_PROG_LEX to fail
- the shell used to execute the configure script
- whether you have original lex or flex or both, and the versions of each
- the output of `find /usr \( -name libl\* -o -name libfl\* \) -ls`


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