$if debug {

compiler/comptime.v

@@ -34,6 +34,12 @@ fn (p mut Parser) comp_time() {
 				p.genln('#endif')
 			}
 		}
+		else if name == 'debug' {
+			p.genln('#ifdef VDEBUG')
+			p.check(.lcbr)
+			p.statements_no_rcbr()
+			p.genln('#endif')
+		}
 		else {
 			println('Supported platforms:')
 			println(SupportedPlatforms)

compiler/main.v

@@ -232,6 +232,9 @@ fn (v mut V) compile() {
 	if v.pref.is_play {
 		cgen.genln('#define VPLAY (1) ')
 	}
+	if v.pref.is_debug {
+		cgen.genln('#define VDEBUG (1) ')
+	}
 	cgen.genln('   
 #include <stdio.h>  // TODO remove all these includes, define all function signatures and types manually 
 #include <stdlib.h>