[Issue 11301] [2.064 beta] core.sys.linux.sys.mman triggers enum resolution error

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=11301



--- Comment #4 from Walter Bright <bugzilla at digitalmars.com> 2013-10-26 18:49:21 PDT ---
This also happens with 2.063, so it is not a regression.

The trouble is the declaration of a.MAP_ANON is hidden inside a conditionally
compiled block. Because the exp of "static if (exp)" cannot be evaluated in
advance, the compiler cannot know yet that the declarations in the block exist.

Then, when doing semantic analysis on module a, it looks up a.MAP_ANON. It
doesn't find MAP_ANON in a, but a.d imports b.d, and b declares a MAP_ANON!

The error is the alias essentially resolves to itself, which is an error.

I think the only solution is to fix the druntime code so it doesn't trigger
what is essentially an unresolvable forward reference error.

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