how to get version identifiers set during compilation?

[timotheecour]

how to get version identifiers set during compilation?

ideally would be something like:
enum versions=VersionFlags;//returns ["OSX","debug"] for example

one use case is to have arbitrary logic on versions without 
requiring new syntax.
eg:
static if(VersionFlags.canFind("OSX") && 
!VersionFlags.canFind("debug") ){...}

but there are other uses.

related question:
how to get compilation flags that were set?
eg search paths

It doesn't seem currently possible, is there interest in having 
it implemented?
perhaps in std.compiler?