[LLVMdev] DEBUG

[Chris Lattner]

On Mon, 7 Jul 2008, David Greene wrote:
>>> from our IR to LLVM IR.  Those files need to include headers from both
>>> LLVM and our compiler components.  That is where the DEBUG conflict
>>> happens.
>>
>> Do you need to use both of the debug mechanisms in the same CPP files?
>
> In some cases, yes.

I have mixed feelings about this.  I consider LLVM's debug macro to really 
be an internal implementation detail that shouldn't be "exported" as part 
of it's API.  It is unfortunate that the C preprocessor is so bad at this 
sort of thing.

Since I think it really is a part of the LLVM internals, I don't think 
that mangling it with a prefix is the right way to go.  This would 
significantly increase verbosity in the code and would be generally 
detrimental.

As a solution for your problem, would something like this work?

#include "llvm/Debug.h"
#define LLVM_DEBUG(X) DEBUG(X)
#undef DEBUG
#include "DavidDebug.h"
...

Or visaversa?

-Chris

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