[LLVMdev] Barking Up The Wrong Tree?

[Reid Kleckner]

On Tue, Sep 30, 2014 at 9:06 AM, Eric Mader <emader at gmx.us> wrote:

> On 9/29/14, 5:51 PM, Reid Kleckner wrote:
>
>  I think any port will involve some changes, but it's really hard to say
> which porting approach will be the least painless beforehand. Aside from
> _MSC_VER incompatibilities messing up portability headers, I think any
> changes you make to support clang on Windows you would also have to do in
> order to use MSVC. MinGW is another possible compiler, but then you're
> porting to gcc, which is a different amount of work.
>
> One of the things I'm hoping to gain from this approach is the ability to
> directly compile Objective-C code. I'll try that today and see what
> happens. I'm also hoping that Objective-C mixed in with C++ will work, but
> perhaps _MSC_VER will mean that won't work?
>

I don't think this will work, unfortunately. My understanding is that Obj-C
requires a fair amount of header and runtime support that won't be
available on Windows. There's no implementation of NSString, for example.

>   I got it worked out by copying the x86 toolset files by hand. I don't
> know why the installer, or install.bat couldn't write them - install.bat
> finished without any error messages.
>

It would be good to run that down at some point. We've had multiple reports
of missing toolsets because our XML files didn't manage to appear in quite
the right spots.
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