Re: [PATCH] usb: Fix clang build

[Daniel P . Berrangé]

On Wed, Jan 20, 2021 at 12:20:43AM +0100, Philippe Mathieu-Daudé wrote:
> Hi Eric,
> 
> On 1/20/21 12:07 AM, Eric Blake wrote:
> > ../hw/usb/dev-uas.c:157:31: error: field 'status' with variable sized type 
> > 'uas_iu' not at the end of a struct or class is a GNU extension 
> > [-Werror,-Wgnu-variable-sized-type-not-at-end]
> >     uas_iu                    status;
> >                               ^
> > 
> > Fix this by specifying a size for the add_cdb member; and at present,
> > the code does not actually use that field other than for the size
> > chosen for the packed uas_iu_command struct, and the choice of one
> > byte does not change the size of the uas_iu union.
> 
> I sent a maybe safer approach (from the bus PoV):
> https://www.mail-archive.com/qemu-block@nongnu.org/msg79192.html
> 
> Do you mind reviewing it?
> 
> > 
> > Signed-off-by: Eric Blake <eblake@redhat.com>
> > ---
> > 
> > I'm not sure why none of our CI tools pick up this particular clang
> > build failure; I hit it on Fedora 33 when configuring to build the
> > entire tree with clang.
> 
> Same issue after upgrading to f33. I sent a patch to bump our CI:
> https://www.mail-archive.com/qemu-devel@nongnu.org/msg774117.html
> 
> To track Fedora releases I was thinking about a gitlab job checking
> if we are using the latest, else failing; smth as:
> 
>  $ curl https://getfedora.org/ | grep -q 'Fedora 33 released'

We'd be better off just adding a job that targets Fedora rawhide IMHO so
we get immediate notice that a toolchain update is going to hurt us, instead
of waiting until the next Fedora is already released to find the problem.


Regards,
Daniel
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