kdd.c:716:47: error: taking address of packed member 'val' of class or structure 'kdd_cmd_msr' may result in an unaligned pointer value [-Werror,-Waddress-of-packed-member] ok = (kdd_rdmsr(s->guest, s->cpuid, msr, &s->txp.cmd.msr.val) == 0); ^~~~~~~~~~~~~~~~~~ http://package18.nyi.freebsd.org/data/headamd64PR216008-default/2017-01-29_16h09m05s/logs/errors/xen-tools-4.7.1_1.log
Solved in r436536.