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Date: Sun, 4 Jan 2009 19:22:16 +0000
From: "Dave Korn" <dave DOT korn DOT cygwin AT googlemail DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: Want to compile GCC 4.3.2 / 4.4.0 under cygwin.
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Eric Blake wrote:
> According to Tim Prince on 12/23/2008 6:50 AM:
>> After installing automake, it is necessary to over-write autoconf with
>> autoconf 2.59 which is easily built from source, as gcc build requires
>> that specific version.
>
> The distro comes with a version of autoconf 2.59, and you can use the
> alternatives package to make it your primary version.   Also, the normal
> autoconf installed by the distro is a wrapper script, which honors various
> environment variables to forward to the desired autoconf version on a
> per-package basis.

  You're thinking of automake, not autoconf.

  Automake ships every version from 1.4 to 1.10, and has an alternatives
wrapper to let you select a default as well as a script to ensure the same
version is picked to regenerate any Makefile.in as was previously used.

  Autoconf ships only one version each of 2.1 and 2.5 series, currently
2.13-5 and 2.63-1, and has a wrapper script, but it only helps hide the
differences in version number within a series.  You can specify
WANT_AUTOCONF=2.5 and it will select whichever one of 2.59 to 2.63 you have
installed, but you only have one of those installed.

> So you don't have to build autoconf 2.59 from scratch
> to build gcc.

  No, you really do need it, either by rolling back your install, maybe using
the Cygwin Time Machine, or by building it from source.

  See also: http://cygwin.com/ml/cygwin-apps/2009-01/msg00000.html

    cheers,
      DaveK

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