I have several errors like this: spice-channel.c:1923:12: error: cast from 'uint8_t *' (aka 'unsigned char *') to 'uint32_t *' (aka 'unsigned int *') increases required alignment from 1 to 4 [-Werror,-Wcast-align] ...(uint32_t *)((uint8_t *)c->peer_msg + GUINT32_FROM_LE(c->peer_msg->caps_offset)); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Is there any guarantee that the result pointer will be 32-bit aligned? In other words, is it guaranteed that the c->peer_msg->caps_offset will be a multiple of 4? I don’t see this written in the spec. Based on the answer, the correct fix is: - If aligned, to cast to a uint32_t * in a way that disables the warning - If misaligned, to replaced *p with a read operation that is safe when mis-aligned (OS dependent I guess) Thanks Christophe _______________________________________________ Spice-devel mailing list Spice-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/spice-devel