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Re: prepare for autoconf-2.60

From: Paul Eggert
Subject: Re: prepare for autoconf-2.60
Date: Thu, 20 Apr 2006 15:29:08 -0700
User-agent: Gnus/5.1007 (Gnus v5.10.7) Emacs/21.4 (gnu/linux)

Bruno Haible <address@hidden> writes:

> Anyway, for the time of migration, we can limit our uses of
> AC_CHECK_DECLS_ONCE to a single function name; see attached patch.

Thanks; I installed that.

>> gnulib-tool assumes Autoconf 2.57 through 2.59, since it copies
>> m4/onceonly_2_57.m4.
> Does m4/onceonly_2_57.m4 break with autoconf-2.60?

I haven't tried it.  I hope it works, and don't see why it wouldn't
work.  I haven't tested it, though.  For my own stuff I was planning
to just switch to 2.60 and stop using onceonly_2_57.m4.

> It produces smaller code, by using some undocumented hooks of
> autoconf. (I had actually hoped to see this implementation be moved
> to autoconf-2.60, rather than the less optimized m4/onceonly.m4.)

Autoconf 2.59c (soon 2.60) uses the m4/onceonly_2_57.m4 code, not the
m4/onceonly.m4 code.  So (unless I'm missing something) your hope will
be realized.

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