Bug 914: fix compiler detection on windows (grafted from d0828c602f7a055cbe51459e936741b5ff8e414c)
Bug 914: fix compiler detection on windows
(grafted from d0828c602f7a055cbe51459e936741b5ff8e414c)

pthulhu/eigen,pthulhu/eigen,pthulhu/eigen,pthulhu/eigen,pthulhu/eigen