Index: /trunk/Mars/macros/rootlogon.C
===================================================================
--- /trunk/Mars/macros/rootlogon.C	(revision 17332)
+++ /trunk/Mars/macros/rootlogon.C	(revision 17333)
@@ -188,5 +188,5 @@
     TString lib(gSystem->GetLinkedLibs());
 
-    TString add = " -std=c++0x";
+    TString add = " -O5 -std=c++0x -Wall -Winit-self -fno-exceptions -fPIC -Wpointer-arith -Wcast-align -Woverloaded-virtual";
     add += " -D__MARS__";
     add += " -DHAVE_ZLIB";