[libvirt] PATCH: 16/25: Fix GNULIB warnings on Mingw

[Daniel P. Berrange]

On Fri, Jan 16, 2009 at 12:14:51PM +0100, Jim Meyering wrote:
> "Daniel P. Berrange" <berrange at redhat.com> wrote:
> > The GNULIB Makefile.am doesn't set any particular compiler warning
> > flags in the belief that upstream GNULIB developers sort out all
> > warnings before committing their code. This is reasonable for builds
> > on mainstream Linux platforms, but MinGW builds of GNULIB don't
> > have nearly the same level of testing. So This patch adds the libvirt
> > $(WARN_CFLAGS) to the gnulib Makefile.am and then fixes the problems
> > this showed up. Nothing of consequence really. Leave it upto gnulib
> > developers whether its worth fixing these.
> >
> >  Makefile.am    |    2
> >  gettimeofday.c |    5 +-
> >  ioctl.c        |    1
> >  poll.c         |    4 -
> >  strerror.c     |  128 ++++++++++++++++++++++++++++-----------------------------
> 
> I've dealt with the poll.c problems upstream.
> 1) Your patch to remove unused var decls
> 2) added a pragma to avoid the warning about the unsigned_var < 0 tests
> 
> All of this looks fine to commit here.
> I've posted an adjusted strerror.c change upstream,
> without so many casts.
> 
> Dan, what warning does the ioctl one fix?
> Same for gettimeofday.

Here's the full set of warnings I got

gettimeofday.c: In function 'rpl_localtime':
gettimeofday.c:54: warning: nested extern declaration of 'localtime'
ioctl.c:32: warning: no previous prototype for 'rpl_ioctl'
poll.c: In function 'rpl_poll':
poll.c:411: warning: comparison of unsigned expression < 0 is always false
poll.c:429: warning: unused variable 'optlen'
strerror.c: In function 'rpl_strerror':
strerror.c:48: warning: return discards qualifiers from pointer target type
strerror.c:54: warning: return discards qualifiers from pointer target type
strerror.c:56: warning: return discards qualifiers from pointer target type
strerror.c:58: warning: return discards qualifiers from pointer target type
strerror.c:60: warning: return discards qualifiers from pointer target type
[snip more strerror]

Daniel
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