[LLVMdev] LLVM binaries for Windows and more

[Andreas Rumpf]

> -----Ursprüngliche Nachricht-----
> Von: LLVM Developers Mailing List <llvmdev at cs.uiuc.edu>
> Gesendet: 12.06.07 19:24:12
> An: LLVM Developers Mailing List <llvmdev at cs.uiuc.edu>
> Betreff: Re: [LLVMdev] LLVM binaries for Windows and more


> 
> On Tue, 12 Jun 2007, Andreas Rumpf wrote:
> > I want to use LLVM for my own "pet" programming language compiler as a backend.
> > Currently it generates C code, but I am not satisfied with this approach as generating
> > high-level C (with proper type declarations!) is horrible.
> > So here are my questions/problems with LLVM:
> >
> > 1.) Are there operations that add, sub, mul integers with overflow 
> >     checking? How much work would it be to add those? They are needed 
> >     for my programming language, but I think Pascal and Ada need those 
> >     too.
> 
> No not yet, the recommended solution is to compute overflow manually with 
> arithmetic after you do the operations you need.  In time LLVM will be 
> extended to support this capability.
> 

Ok, but I fear the optimizer is not smart enough to produce something like: 

a+b -->

          mov eax, a
          add eax, b
          jno theEnd
          call raiseOverflow
        theEnd:

It is not critical though - I turn off overflow checking after debugging anyway.

> > 2.) The version 2.0 of your source code does not compile with Microsoft 
> >     Visual C++ 2005 Express Edition. (By the way, is it documented that 
> >     I need Bison? I figured that out myself...):
> 
> You might want to try LLVM CVS.  I believe there are several fixes in CVS 
> that were not in 2.0.  If that doesn't work, we will gladly accept patches 
> to make it work.
> 
> > I fixed this by adding a ``return 0;`` at the end of the method. But why 
> > don't you just provide binaries for windows? I could send you the 
> > binaries that I built - I have not yet tested them though.
> 
> The LLVM community consists of volenteers, and noone volenteered for 2.0 
> :)
> 
> -Chris

I volunteer. As soon as I get everything to work. 

Next problem: I now have the hello.bc file compiled. But how do I get an executable from this? I tried: 

C:\Eigenes\compiler\llvm-2.0\win32\release>llvm-ld -o=hellow.exe hellow.bc
llvm-ld: Could not find llvm-stub.exe executable!

So, I don't have "llvm-stub.exe". But why did it not build one? And what is the
difference between "llvm-ld" and "llvm-link"? "llvm-link" does not work either. 

Thanks,

Andreas
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