Don't automaticlly flush after print, it leads to poor performance (it's better if the user controls this)

Build system cleanup and release/stats options.

Use mkstemp instead of deprecated tmpnam.

Fix 'make crystal', .PHONY targets, don't assume . is in PATH.

Silence warnings from "which" correctly.

When using a union as a restriction, bind free variables  from left to right whiel discarding matching types

Add more samples

Removed CastFunToReturnVoid AST node and use a regular Cast node instead. Allow casting a function to another one that returns void.