[cfe-dev] MinGW build does not compile with C++11

[Rafael Espíndola]

> It is.  I recently ran into this problem and patching with the following allows
> a full build of LLVM/Clang for i686-mingw32 host (GCC 4.7.2):
>
> --- Makefile.rules      (revision 203598)
> +++ Makefile.rules      (working copy)
> @@ -322,7 +322,13 @@ endif
>  ifeq ($(ENABLE_CXX1Y),1)
>    CXX.Flags += -std=c++1y
>  else
> -       CXX.Flags += -std=c++11
> +  ifeq ($(HOST_OS),MingW)
> +    # MinGW is a bit stricter and lacks things like
> +    # 'strdup', 'stricmp', etc...
> +    CXX.Flags += -std=gnu++11
> +  else
> +    CXX.Flags += -std=c++11
> +  endif
>  endif
>
> I am happy to apply the above if others are OK with it.
> I am currently interested in using mingw32.

We should change cmake too I think.

Would anyone object to applying the patch to keep mingw32 working?
Even if we make mingw-w64 the preferred solution, that is such a small
patch I wouldn't have a problem with it.

Cheers,
Rafael