Re: [Xen-devel] Failing to build qemu-xen (in dev-mtp.c) with GCC9

[Anthony PERARD <anthony.perard@xxxxxxxxxx>]

On Fri, Jul 26, 2019 at 02:24:23AM +0200, Dario Faggioli wrote:
> Hey,

Hi,

> openSUSE Tumbleweed has: gcc version 9.1.1 20190703
> 
> And this fails to build QEMU, like this:

I'm sorry I have to ask, which version of QEMU or qemu-xen are speaking
about? I'm pretty sure it's unstable, but it's better to ask :-).

>   CC      hw/watchdog/wdt_ib700.o
> /build/tools/qemu-xen-dir/hw/usb/dev-mtp.c: In function 
> ‘usb_mtp_write_metadata’:
> /build/tools/qemu-xen-dir/hw/usb/dev-mtp.c:1715:36: error: taking address of 
> packed member of ‘struct <anonymous>’ may result in an unaligned pointer 
> value [-Werror=address-of-packed-member]
>  1715 |                             dataset->filename);
>       |                             ~~~~~~~^~~~~~~~~~
> 
> This seems to be fixed, for me, if I apply upstream patch 1259f27ec2
> ("usb-mtp: fix alignment of access of ObjectInfo filename field").

Thanks, I'll probably apply that to qemu-xen unstable.

-- 
Anthony PERARD

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