start using getopt to parse arguments

wscript

@@ -1,8 +1,9 @@
 def options(opt):
     opt.load("compiler_cxx")
 
-def configure(cnf):
-    cnf.load("compiler_cxx")
+def configure(conf):
+    conf.load("compiler_cxx")
+    conf.check(header_name = "getopt.h")
 
 def build(bld):
     bld(features = "cxx cxxprogram",