IIRC gcc generates somewhat faster machine code.<p>clang is available for Windows as clang-cl from here: <a href="http:&#x2F;&#x2F;llvm.org&#x2F;releases&#x2F;download.html" rel="nofollow">http:&#x2F;&#x2F;llvm.org&#x2F;releases&#x2F;download.html</a><p>Here&#x27;s the status page for compatibility with MSVC (clang 3.9, i.e. current development version): <a href="http:&#x2F;&#x2F;clang.llvm.org&#x2F;docs&#x2F;MSVCCompatibility.html" rel="nofollow">http:&#x2F;&#x2F;clang.llvm.org&#x2F;docs&#x2F;MSVCCompatibility.html</a>