diff --git a/Source/cmElseCommand.cxx b/Source/cmElseCommand.cxx
index 046fa88fcf..5451004abd 100644
--- a/Source/cmElseCommand.cxx
+++ b/Source/cmElseCommand.cxx
@@ -86,6 +86,62 @@ bool cmElseCommand::InitialPass(std::vector<std::string> const& args)
       }
     }
 
+  if (args.size() == 3 && (args[1] == "LESS"))
+    {
+    def = m_Makefile->GetDefinition(args[0].c_str());
+    def2 = m_Makefile->GetDefinition(args[2].c_str());
+    if (!def)
+      {
+      def = args[0].c_str();
+      }
+    if (!def2)
+      {
+      def2 = args[2].c_str();
+      }    
+    if(atof(def) < atof(def2))
+      {
+      f = new cmIfFunctionBlocker();
+      }
+    }
+
+  if (args.size() == 3 && (args[1] == "GREATER"))
+    {
+    def = m_Makefile->GetDefinition(args[0].c_str());
+    def2 = m_Makefile->GetDefinition(args[2].c_str());
+    if (!def)
+      {
+      def = args[0].c_str();
+      }
+    if (!def2)
+      {
+      def2 = args[2].c_str();
+      }    
+    if(atof(def) > atof(def2))
+      {
+      f = new cmIfFunctionBlocker();
+      }
+    }
+
+  if (args.size() == 3 && (args[1] == "STRLESS"))
+    {
+    def = m_Makefile->GetDefinition(args[0].c_str());
+    def2 = m_Makefile->GetDefinition(args[2].c_str());
+    if(strcmp(def,def2) < 0)
+      {
+      f = new cmIfFunctionBlocker();
+      }
+    }
+
+  if (args.size() == 3 && (args[1] == "STRGREATER"))
+    {
+    def = m_Makefile->GetDefinition(args[0].c_str());
+    def2 = m_Makefile->GetDefinition(args[2].c_str());
+    if(strcmp(def,def2) > 0)
+      {
+      f = new cmIfFunctionBlocker();
+      }
+    }
+
   if (args.size() == 3 && (args[1] == "MATCHES"))
     {
     def = m_Makefile->GetDefinition(args[0].c_str());
diff --git a/Source/cmIfCommand.cxx b/Source/cmIfCommand.cxx
index 2146a5ed36..85cb98d3a8 100644
--- a/Source/cmIfCommand.cxx
+++ b/Source/cmIfCommand.cxx
@@ -149,6 +149,62 @@ bool cmIfCommand::InitialPass(std::vector<std::string> const& args)
       }
     }
   
+  if (args.size() == 3 && (args[1] == "LESS"))
+    {
+    def = m_Makefile->GetDefinition(args[0].c_str());
+    def2 = m_Makefile->GetDefinition(args[2].c_str());
+    if (!def)
+      {
+      def = args[0].c_str();
+      }
+    if (!def2)
+      {
+      def2 = args[2].c_str();
+      }    
+    if(atof(def) >= atof(def2))
+      {
+      f = new cmIfFunctionBlocker();
+      }
+    }
+
+  if (args.size() == 3 && (args[1] == "GREATER"))
+    {
+    def = m_Makefile->GetDefinition(args[0].c_str());
+    def2 = m_Makefile->GetDefinition(args[2].c_str());
+    if (!def)
+      {
+      def = args[0].c_str();
+      }
+    if (!def2)
+      {
+      def2 = args[2].c_str();
+      }    
+    if(atof(def) <= atof(def2))
+      {
+      f = new cmIfFunctionBlocker();
+      }
+    }
+
+  if (args.size() == 3 && (args[1] == "STRLESS"))
+    {
+    def = m_Makefile->GetDefinition(args[0].c_str());
+    def2 = m_Makefile->GetDefinition(args[2].c_str());
+    if(strcmp(def,def2) >= 0)
+      {
+      f = new cmIfFunctionBlocker();
+      }
+    }
+
+  if (args.size() == 3 && (args[1] == "STRGREATER"))
+    {
+    def = m_Makefile->GetDefinition(args[0].c_str());
+    def2 = m_Makefile->GetDefinition(args[2].c_str());
+    if(strcmp(def,def2) <= 0)
+      {
+      f = new cmIfFunctionBlocker();
+      }
+    }
+
   // if we created a function blocker then set its args
   if (f)
     {
diff --git a/Source/cmIfCommand.h b/Source/cmIfCommand.h
index 164c5c56b5..2453c3cdd3 100644
--- a/Source/cmIfCommand.h
+++ b/Source/cmIfCommand.h
@@ -93,7 +93,10 @@ public:
       "using (NOT define) (def AND def2) (def OR def2) (def MATCHES def2) "
       "(COMMAND cmd) (EXISTS file) MATCHES checks if def matches the "
       "regular expression def2. COMMAND checks if the cmake command cmd "
-      "is in this cmake executable. EXISTS file checks if file exists";
+      "is in this cmake executable. EXISTS file checks if file exists."
+      "Additionally you can do comparisons using LESS GREATER STRLESS "
+      "and STRGREATER. LESS and GREATER do numeric comparison while "
+      "STRLESS and STRGREATER do string comparisons.";
     }
   
   cmTypeMacro(cmIfCommand, cmCommand);