On 03/16/2010 05:59 PM, Grégoire Sutre wrote: >> In fact, any package which makes good use of Autoconf cannot support >> -Wundef. > > I don't see why. Could you please elaborate?
AC_CHECK_FUNCS leaves HAVE_FUNC undefined if it is missing, but defines HAVE_FUNC to 1 if it is present. It is much easier to write: #if HAVE_FUNC than it is to write #if defined HAVE_FUNC && HAVE_FUNC everywhere that you want to use the default results provided by autoconf. That's why gnulib does NOT want to cater to -Wundef. I won't go as far as Bruno's statement; if you want to use both autoconf and -Wundef in your files, then more power to you. That is, I see no fundamental reason why using autoconf means you can't make the extra effort to do the redundant typing to silence -Wundef. But I agree with Bruno's sentiment that it is a waste of time, and won't do it in any of my packages. -- Eric Blake ebl...@redhat.com +1-801-349-2682 Libvirt virtualization library http://libvirt.org
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