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Re: error: possibly undefined macro: AC_CHECK_HEADERS_ONCE
From: |
Bruno Haible |
Subject: |
Re: error: possibly undefined macro: AC_CHECK_HEADERS_ONCE |
Date: |
Wed, 10 Aug 2005 14:03:49 +0200 |
User-agent: |
KMail/1.5 |
Stepan Kasal wrote:
> The macro gl_INCLUDED_REGEX contains this:
>
> m4_syscmd([test -f '$1'])
> ifelse(m4_sysval, 0,
> [ ...
> gl_PREREQ_REGEX
> ])
> ...
>
> Why is the above trick necessary? Why should the macro expansion
> depend on the presence of the file?
That appears to be obsolete. As far as I see, there are no users of this
macro which don't also bundle regex.c.
> Second: just above the quoted code:
>
> test -n "$1" || AC_MSG_ERROR([missing argument])
>
> yes, the macro gl_INCLUDED_REGEX requires a parameter, but why it should
> be reported in runtime? (Yes, the parameter might be a shell variable,
> but is this done often?)
You're right, that should be turned into an AC_FATAL call.
> Third, the name regex.m4 conflicts with a file in Automake. This can
> cause problems with "aclocal --include".
No, it cannot: This file in automake is not installed by automake. It's
private to automake. Furthermore it bears the comment
"FIXME: This macro seems quite obsolete now since rx doesn't seem to be
maintained, while regex is."
So it's likely automake's regex.m4 which will go away.
> Fourth, I noticed a typo; could you please apply the attached patch?
Thanks, applied. Let's see how many people still use autoconf-2.54 :-)
Bruno
- Re: error: possibly undefined macro: AC_CHECK_HEADERS_ONCE, Stepan Kasal, 2005/08/10
- Re: error: possibly undefined macro: AC_CHECK_HEADERS_ONCE,
Bruno Haible <=
- Re: error: possibly undefined macro: AC_CHECK_HEADERS_ONCE, Paul Eggert, 2005/08/23
- Re: error: possibly undefined macro: AC_CHECK_HEADERS_ONCE, Sam Steingold, 2005/08/23
- Re: error: possibly undefined macro: AC_CHECK_HEADERS_ONCE, Stepan Kasal, 2005/08/24
- Re: error: possibly undefined macro: AC_CHECK_HEADERS_ONCE, Sam Steingold, 2005/08/24
- Re: error: possibly undefined macro: AC_CHECK_HEADERS_ONCE, Stepan Kasal, 2005/08/25
- Re: error: possibly undefined macro: AC_CHECK_HEADERS_ONCE, Stepan Kasal, 2005/08/25
- Re: error: possibly undefined macro: AC_CHECK_HEADERS_ONCE, Sam Steingold, 2005/08/25
- Re: [bug-gnulib] Re: error: possibly undefined macro: AC_CHECK_HEADERS_ONCE, Bruno Haible, 2005/08/25
- Re: error: possibly undefined macro: AC_CHECK_HEADERS_ONCE, Stepan Kasal, 2005/08/25
- Re: [bug-gnulib] Re: error: possibly undefined macro: AC_CHECK_HEADERS_ONCE, Bruno Haible, 2005/08/25