Could we get a LP64 version identifier?

[Frits van Bommel]

Walter Bright wrote:
> Frits van Bommel wrote:
>> Some testing shows that all DMD-frontend based compilers (i.e. DMD, 
>> GDC and LDC) seem to produce that error message for any version 
>> identifier starting with "D_" (Including "D_" itself).
> 
> The point of that is to ensure that the D_ name space is reserved for 
> predefined version identifiers. This check is done in 
> VersionCondition::checkPredefined() in cond.c.

I figured as much, and probably should have mentioned that for 
clarification.