haxe.macro.Compiler.define() example

MacroDefine.hx

/**
* Macro Compiler Define example
* 
* Shows how to use a compiler configuration macro to set up more "defines" based
* on an existing define.
*
* Jason O'Neil 2013.  Use as you please.
* 
* haxe -D mydebug --macro "MacroDefine.setDefines()" -x MacroDefine.hx
*   -- traces "A" and "B"
* haxe -D myrelease --macro "MacroDefine.setDefines()" -x MacroDefine.hx
*   -- traces "B" and "C"
* haxe -x MacroDefine.hx
*   -- doesn't trace anything
*/

#if macro
import haxe.macro.Context;
#end 

class MacroDefine 
{
	public static function setDefines()
	{
		#if mydebug
			haxe.macro.Compiler.define("A");
			haxe.macro.Compiler.define("B");
		#elseif myrelease
			haxe.macro.Compiler.define("B");
			haxe.macro.Compiler.define("C");
		#end
	}

	static function main() 
	{
		trace ("Here are the defines: ");
		#if A
			trace ("A");
		#end

		#if B
			trace ("B");
		#end 

		#if C 
			trace ("C");
		#end 
	}
}