Re: style

[Gary V. Vaughan]

On Sat, 8 Nov 2003 22:09:14 +0000, "Patrick Welche"
<address@hidden> said:
> On Tue, Nov 04, 2003 at 01:58:01PM +0100, Akim Demaille wrote:
> >  > Why the change AC_DEFUN -> m4_define ?
> > 
> > It is lightweight.  I recommend using m4_define for Autoconf authors
> > when they can, as it speeds up the process, and in some case, it's
> > even better for error messages.  Nevertheless, the users should not
> > care about this possibility.
> 
> Does that mean that in some package's .m4 files, I should use AC_DEFUN,
> but if contributing to lib/autoconf/*.m4 I should use m4_define ?
> Or are there specifically things which you aren't allowed to do in
> a macro defined using m4_define?

If a macro is to AC_REQUIRE another macro, or is itself to be
AC_REQUIRED, or if aclocal is to detect a call of the macro in
configure.ac and add its definition to aclocal.m4, then use AC_DEFUN.  If
a macro is a helper macro that is not visible to users, then m4_define
can be used.

Cheers,
        Gary.
-- 
  ())_.  Gary V. Vaughan    gary@(lilith.warpmail.net|gnu.org)
  ( '/   Research Scientist http://www.oranda.demon.co.uk       ,_())____
  / )=   GNU Hacker         http://www.gnu.org/software/libtool  \'     
  `&
`(_~)_   Tech' Author       http://sources.redhat.com/autobook  
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