Index: trunk/Mars/macros/rootlogon.C
===================================================================
--- trunk/Mars/macros/rootlogon.C	(revision 11896)
+++ trunk/Mars/macros/rootlogon.C	(revision 12017)
@@ -176,13 +176,10 @@
     gInterpreter->AddIncludePath(dir+"mcorsika");
 
-    if (TString("linux")==gSystem->GetBuildArch())
-    {
-        TString options = " -O3 -D__MARS__ -pipe -Wall -Woverloaded-virtual -fno-exceptions -fPIC ";
+    TString options = " -O3 -DHAVE_ZLIB -D__MARS__ -pipe -Wall -Woverloaded-virtual -fno-exceptions -fPIC ";
 
-        TString s = "cd $BuildDir ; ";
-        s += "g++ -c" + options + "-Iinclude -D_REENTRANT $IncludePath $SourceFiles ; ";
-        s += "g++ $ObjectFiles -shared -Wl,-soname,$LibName.so -O -o $SharedLib";
-        gSystem->SetMakeSharedLib(s);
-    }
+    TString s = "cd $BuildDir ; ";
+    s += "g++ -c" + options + "-Iinclude -D_REENTRANT $IncludePath $SourceFiles ; ";
+    s += "g++ $ObjectFiles -shared -Wl,-soname,$LibName.so -O -o $SharedLib";
+    gSystem->SetMakeSharedLib(s);
 
     cout << "\033[32m" << "Welcome to the Mars Root environment." << "\033[0m" << endl;