When using Win32/x86 in a version block is that the compiler or OS?

[John Colvin]

On Sunday, 12 January 2014 at 19:01:56 UTC, Gary Willoughby wrote:
> On Sunday, 12 January 2014 at 19:01:05 UTC, John Colvin wrote:
>> On Sunday, 12 January 2014 at 18:47:43 UTC, Gary Willoughby 
>> wrote:
>>> When using Win32/x86 in a version block, does that relate to 
>>> the compiler or OS?
>>>
>>> for example:
>>>
>>> version(Win32)
>>> {
>>>   // 32bit Windows or 32bit Compiler?
>>> }
>>>
>>> version(X86)
>>> {
>>>   // 32bit OS or 32bit Compiler?
>>> }
>>>
>>> If these don't relate to the compiler is there any indication 
>>> that the program is being compiled with a 32bit compiler?
>>>
>>> I'm primarily asking because i need to use this to constrain 
>>> dub to build different things depending on what compiler is 
>>> used and on what architecture.
>>
>> version arguments are for the target architecture, not the 
>> compiler/build-environment.
>
> Are there any for the compiler?

http://dlang.org/phobos/std_compiler.html perhaps?