Re: [Qemu-devel] clang warnings too noisy

[Stefan Weil]

Am 07.03.2015 um 12:14 schrieb Paolo Bonzini:
> On 07/03/2015 00:47, Peter Maydell wrote:
> > > 1. It complains about glib headers:
> > > In file included from /home/stefanha/qemu/include/net/eth.h:32:
> > > In file included from /home/stefanha/qemu/include/qemu/iov.h:17:
> > > In file included from /home/stefanha/qemu/include/qemu-common.h:43:
> > > In file included from /home/stefanha/qemu/include/glib-compat.h:19:
> > > In file included from /usr/include/glib-2.0/glib.h:50:
> > > In file included from /usr/include/glib-2.0/glib/ghash.h:33:
> > > In file included from /usr/include/glib-2.0/glib/glist.h:32:
> > > /usr/include/glib-2.0/glib/gmem.h:76:78: warning: unknown attribute
> > > '__alloc_size__' ignored [-Wunknown-attributes]
> > > gpointer g_malloc (gsize n_bytes) __attribute__((__malloc__))
> > > __attribute__((__alloc_size__(1)));
> > >                                                                               ^
> > > /usr/include/glib-2.0/glib/gmem.h:78:79: warning: unknown attribute
> > > '__alloc_size__' ignored [-Wunknown-attributes]
> > I think this is a glib bug...
> If clang supports fewer attributes than GCC, the right course of action
> is disabling the warning on clang.  There are very few attributes that
> are used commonly and that affect ABI; most of them are just annotations.
>
> Paolo

On Debian Jessie I don't get any of those warnings with clang.

I think we can focus clang support on those environmentswhich are
really needed: Mac OS X and Linux with sufficiently new distributions.
Then no action is necessary.

Stefan