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Re: expand-before-require bug


From: Bruno Haible
Subject: Re: expand-before-require bug
Date: Wed, 28 Jan 2009 23:20:45 +0100
User-agent: KMail/1.9.9

Eric Blake wrote:
> > How about this work-around?
> >
> >
> > -# AC_DEFUN_ONCE(NAME, VALUE)
> > +# AC_DEFUN_ONCE([NAME], VALUE)
> >  # --------------------------
> 
> Lengthen the separator line by two dashes, then commit.

I disagree. Inside autoconf macro documentation, brackets denote optional
arguments. Examples (from the autoconf doc):

 -- Macro: AC_CHECK_FUNC (FUNCTION, [ACTION-IF-FOUND],
          [ACTION-IF-NOT-FOUND])

 -- Macro: AC_CHECK_HEADER (HEADER-FILE, [ACTION-IF-FOUND],
          [ACTION-IF-NOT-FOUND], [INCLUDES = `AC_INCLUDES_DEFAULT'])

So this means that the first argument of AC_DEFUN_ONCE can be empty?!

Brubno




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