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Re: Detecting (g)m4

From: Eric Blake
Subject: Re: Detecting (g)m4
Date: Sat, 18 Jul 2009 06:50:03 -0700 (PDT)

[I don't know how to make nabble cc the OP, and I didn't get
the original message to do a reply-all from my inbox]

> > I made sure my autoconf was up-to-date and did an autoreconf -f.
> > Still isn't right.

Correct.  The bug is not what version of autoconf you are using,
but what version of m4/m4.m4 used in the copy of bison you are
using.  And has already been pointed out in this thread, you can
use ./configure M4=/path/to/m4 to work around the bug.

> >
> > Do you know which version of m4 is the lowest that works?  I could
> > write a macro that checks the m4 version and pitch it to the autoconf
> > team.

M4 1.4.5 or newer.

The autoconf team already has this macro written, and in fact,
the latest bison already uses it.

Eric Blake

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