machinekit/machinekit — pull request #231 by zultron (2014-06-24 18:56:10+00:00)
Title: Fix x86_64 RTAI math `CFLAGS`

- `rtai-config --arch` output changes with v4.0
- instead use `$host_cpu` from `AC_CANONICAL_HOST`

- add `-mpreferred-stack-boundary=4` to enable SSE instructions in
kmodules
- http://mail.rtai.org/pipermail/rtai/2013-December/026198.html