[LLVMdev] Compiling As Obj-C or Obj-C++ On Windows

[Eric Mader]

Hi Reid,

Thanks for the explanation. The hack didn't seem to work...

Regards,
Eric

On 10/1/14, 12:01 PM, Reid Kleckner wrote:
> This is a horrible hack, but try adding:
> -Xclang -x -Xclang objc++
>
> If your files end in .mm, we will assume they are Obj-C++ by default.
>
> Basically the clang-cl driver does not accept the same set of command 
> line flags that the gcc-style driver accepts because there are 
> conflicts around some commonly used options (-MD, for example). We 
> make gcc-style flags available in clang-cl on an as-needed basis 
> assuming there are no conflicts. Understandably, it is really 
> confusing to users to have to understand two sets of flags and it 
> might be worth revisiting that decision.
>
> The -Xclang flag is a workaround that bypasses both the gcc-style and 
> cl-style flags processing and directly accesses the clang -cc1 command 
> line flag set, which is yet again different from either of the first two.
>
> On Wed, Oct 1, 2014 at 12:09 PM, Eric Mader <emader at gmx.us 
> <mailto:emader at gmx.us>> wrote:
>
>     I have some C++ source files that mix in small bits of Obj-C. On
>     the Mac, these files are marked to be compiled as Obj-C++. Looking
>     at the clang help, it seems that the option for that is "-ObjC++".
>     However, when I add that in Additional Options I get an error message:
>
>     CL> : error : invalid integral value 'bjC++' in '-ObjC++'
>
>     I see this same message if I put "-Xclang" in front of "-ObjC++".
>
>     Is there a way to get the code to compile as Obj-C++ on Windows?
>
>     Regards,
>     Eric Mader
>
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