[Spice-devel] [spice-server PATCH v2 09/10] smartcard: use SPICE_ALIGNED_CAST

Christophe Fergeau cfergeau at redhat.com
Mon Aug 24 05:10:59 PDT 2015


On Fri, Aug 14, 2015 at 06:24:30PM +0200, Victor Toso wrote:
> In order to avoid false posive alignment warnings
> clang:
> smartcard.c:131:29: error: cast from 'uint8_t *' (aka 'unsigned char *')
> to 'VSCMsgHeader *' (aka 'struct VSCMsgHeader *') increases required
> alignment from 1 to 4 [-Werror,-Wcast-align]
> 
> VSCMsgHeader *vheader = (VSCMsgHeader*)state->buf;

You should explain why this is aligned despite what the compiler
says/thinks.

Christophe
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