[LLVMdev] LLVM 3.6: problems building on Windows using MSVC 2013

[Alan Garny]

Ok, thanks for the clarification. I don’t remember seeing any warnings when building LLVM+Clang the ‘normal’ way, but I have nonetheless upgraded to MSVC 2013 Update 4, just to be on the ‘safe side’.

 

Alan

 

From: Zachary Turner [mailto:zturner at google.com] 
Sent: 10 March 2015 18:42
To: Alan Garny; llvmdev
Subject: Re: [LLVMdev] LLVM 3.6: problems building on Windows using MSVC 2013

 

Update 4 is the minimum required version.  I don't know the exact details of what was fixed between Update 3 and Update 4, but currently if you have anything less than Update 4 our CMake warns about miscompiles and other things.

 

On Tue, Mar 10, 2015 at 10:00 AM Alan Garny <agarny at hellix.com> wrote:

No, I am currently using MSVC 2013 Update 3. Why? Is there something I should (have) know(n)?

 

Alan

 

From: Zachary Turner [mailto:zturner at google.com] 
Sent: 10 March 2015 17:40
To: Alan Garny; llvmdev


Subject: Re: [LLVMdev] LLVM 3.6: problems building on Windows using MSVC 2013

 

To be certain, are you using MSVC 2013 Update 4?

 

On Tue, Mar 10, 2015 at 9:18 AM Alan Garny <agarny at hellix.com> wrote:

> > So… my question is: why?! More importantly: what do I need to do to be
> > able to export/import a class such as clang::driver::Compilation?
>
> It looks like MSVC is trying to synthesize and export the copy assignment
> operator and copy constructur. This is interesting, as I thought it wouldn't do
> that if the class turns out not to be non-copyable.
>
> Does adding the following to the class (and similarly for others that are
> failing) work?
>
>   Compilation& operator=(Compilation&) = delete;
>   Compilation(Compilation&) = delete

Good timing. This is the conclusion and solution to which I came too. I have tried it on my test case and it is working fine. I am now going to try it on my project and see how it goes, but at least that seems promising.

Alan


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