diff --git a/wscript b/wscript
index 80f3db1..51a3943 100644
--- a/wscript
+++ b/wscript
@@ -2,13 +2,15 @@
 VERSION='0.1'
 APPNAME='QT-Test'
 
+from waflib import Configure
+
 def options(opt):
     opt.load('compiler_c compiler_cxx boost protoc qt4')
     
 def configure(conf):
     conf.load("compiler_c compiler_cxx")
 
-#    conf.add_supported_cxxflags (cxxflags = ['-O3', '-g'])
+    conf.add_supported_cxxflags (cxxflags = ['-O3', '-g'])
 
     conf.load('protoc')
 
@@ -16,4 +18,33 @@
 
     conf.load('boost')
 
-    conf.check_boost(lib='system random thread')
\ No newline at end of file
+    conf.check_boost(lib='system random thread')
+
+    conf.write_config_header('config.h')
+
+		
+def build (bld):
+    qt = bld (
+        target = "ChronoChat",
+        features = "qt4 cxx cxxprogram",
+        defines = "WAF",
+        source = bld.path.ant_glob(['src/*.cpp', 'src/*.ui']),
+        includes = ".",
+        use = "BOOST BOOST_THREAD QTCORE QTGUI",
+        )   
+
+
+@Configure.conf
+def add_supported_cxxflags(self, cxxflags):
+    """
+    Check which cxxflags are supported by compiler and add them to env.CXXFLAGS variable
+    """
+    self.start_msg('Checking allowed flags for c++ compiler')
+
+    supportedFlags = []
+    for flag in cxxflags:
+        if self.check_cxx (cxxflags=[flag], mandatory=False):
+            supportedFlags += [flag]
+
+    self.end_msg (' '.join (supportedFlags))
+    self.env.CXXFLAGS += supportedFlags