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Re: [PATCH] PR35457, provide system to backport autoconf 2.60+ bugfixes


Hello Paolo,

* Paolo Bonzini wrote on Fri, Apr 18, 2008 at 11:47:46AM CEST:
> This patch provides a way to backport autoconf 2.60+ bugfixes, based on  
> the existing confsubdir.m4 file.  It then backports the fix for PR35457.  
>  I have not committed it yet because I have to regenerate all the  
> aclocal.m4 files in gcc and src.

It would be cool if such backports are written to automatically expand
to nil if a new enough Autoconf is used.  That helps upgrading (I've
been working on and off to get GCC to build with recent autotools).

Something like

  m4_version_prereq([2.62], [],
[AC_DEFUN([AC_USE_SYSTEM_EXTENSIONS],
[...
])
])

would be nice for extensions.m4, and here as well.

Thanks,
Ralf

> 2008-04-18  Paolo Bonzini  <bonzini@gnu.org>
> 
> 	PR bootstrap/35457
> 
> 	* confsubdir.m4: Rename to...
> 	* override.m4: ... this.  Make sure aclocal always picks it.
> 	Add more lenient precious variable check, backported from
> 	autoconf trunk.


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