diff --git a/build.rb b/build.rb
index 52d1dd2..809fd4a 100755
--- a/build.rb
+++ b/build.rb
@@ -2,15 +2,9 @@
 
 #I'll put this in here as an example
 
-# make a folder called src and a folder called build
-# then put some c source code in src
-# then run rub and watch it build
+#
 
-# of course you could make your own build.rb to build any project
-
-#	ruby might not let you modify CONSTANTS
-#	so put a $ in front of the name which makes
-#	them global and not CONSTANT
+#should maybe use environment variables for these
 $CC="gcc"
 CFLAGS="-O1 -march=native -std=c11"
 $EFLAGS = "" #extra flags
@@ -51,7 +45,6 @@ def parse(arg)
 	
 	else
 		#error "unknown argument: #{arg}"
-		print arg
 	end
 
 	case arg.split("=")[0]
@@ -75,12 +68,9 @@ end
 
 #main build function
 def main
-	#if Dir.children(SRCDIR).count == 0
-		#error("src directory empty")
-	#end
-
-	error("src directory empty") unless Dir.children(SRCDIR)
+	error("src directory empty") if Dir.children(SRCDIR).count == 0
 
+	#create a thread for each compilation unit
 	threads = []
 
 	Dir.each_child(SRCDIR) {|x|
@@ -96,6 +86,7 @@ def main
 	until threads.map { |t| t.alive? }.include?(false) 
 	end
 
+	#link
 	build = Dir.each_child(BUILDDIR)
 	o_files = []
 	build.each { |s|