diff --git a/call_traits_test.cpp b/call_traits_test.cpp
index 95dd0d8..afeb285 100644
--- a/call_traits_test.cpp
+++ b/call_traits_test.cpp
@@ -17,6 +17,10 @@
 #include <boost/call_traits.hpp>
 
 #include <boost/type_traits/type_traits_test.hpp>
+
+// a way prevent warnings for unused variables
+template<class T> inline void unused_variable(const T&) {}
+
 //
 // struct contained models a type that contains a type (for example std::pair)
 // arrays are contained by value, and have to be treated as a special case:
@@ -44,7 +48,7 @@ struct contained
    reference get() { return v_; }
    const_reference const_get()const { return v_; }
    // pass value:
-   void call(param_type p){}
+   void call(param_type){}
 
 };
 
@@ -69,7 +73,7 @@ struct contained<T[N]>
    // return by_ref:
    reference get() { return v_; }
    const_reference const_get()const { return v_; }
-   void call(param_type p){}
+   void call(param_type){}
 };
 #endif
 
@@ -214,8 +218,8 @@ int main(int argc, char *argv[ ])
 #endif
 
    check_wrap(wrap(2), 2);
-   const char ca[4] = "abc";
    // compiler can't deduce this for some reason:
+   //const char ca[4] = "abc";
    //check_wrap(wrap(ca), ca);
 #ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
    check_wrap(wrap(a), a);
@@ -318,6 +322,19 @@ void call_traits_test<T, isarray>::assert_construct(typename call_traits_test<T,
    param_type p2(v);
    param_type p3(r);
    param_type p4(p);
+   
+   unused_variable(v2);
+   unused_variable(v3);
+   unused_variable(v4);
+   unused_variable(r2);
+   unused_variable(r3);
+   unused_variable(cr2);
+   unused_variable(cr3);
+   unused_variable(cr4);
+   unused_variable(cr5);
+   unused_variable(p2);
+   unused_variable(p3);
+   unused_variable(p4);
 }
 #ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
 template <typename T>
@@ -354,6 +371,17 @@ void call_traits_test<T, true>::assert_construct(typename boost::call_traits<T>:
    param_type p2(v);
    param_type p3(r);
    param_type p4(p);
+   
+   unused_variable(v2);
+   unused_variable(v3);
+   unused_variable(v4);
+   unused_variable(v5);
+   unused_variable(r2);
+   unused_variable(cr2);
+   unused_variable(cr3);
+   unused_variable(p2);
+   unused_variable(p3);
+   unused_variable(p4);
 }
 #endif //BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
 //
diff --git a/compressed_pair_test.cpp b/compressed_pair_test.cpp
index c31a155..25a2cb4 100644
--- a/compressed_pair_test.cpp
+++ b/compressed_pair_test.cpp
@@ -199,7 +199,7 @@ struct compressed_pair_reference1_tester
 };
 
 template <class T1, class T2>
-void compressed_pair_reference1_tester<T1, T2>::test(first_param_type p1, second_param_type p2, first_param_type p3, second_param_type p4)
+void compressed_pair_reference1_tester<T1, T2>::test(first_param_type p1, second_param_type p2, first_param_type, second_param_type)
 {
 #ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
    // first param construct:
@@ -225,7 +225,7 @@ struct compressed_pair_reference2_tester
 };
 
 template <class T1, class T2>
-void compressed_pair_reference2_tester<T1, T2>::test(first_param_type p1, second_param_type p2, first_param_type p3, second_param_type p4)
+void compressed_pair_reference2_tester<T1, T2>::test(first_param_type p1, second_param_type p2, first_param_type, second_param_type)
 {
 #ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
    // second param construct:
@@ -252,7 +252,7 @@ struct compressed_pair_array1_tester
 };
 
 template <class T1, class T2>
-void compressed_pair_array1_tester<T1, T2>::test(first_param_type p1, second_param_type p2, first_param_type p3, second_param_type p4)
+void compressed_pair_array1_tester<T1, T2>::test(first_param_type p1, second_param_type p2, first_param_type, second_param_type)
 {
   // default construct:
    boost::compressed_pair<T1,T2> cp1;
@@ -282,7 +282,7 @@ struct compressed_pair_array2_tester
 };
 
 template <class T1, class T2>
-void compressed_pair_array2_tester<T1, T2>::test(first_param_type p1, second_param_type p2, first_param_type p3, second_param_type p4)
+void compressed_pair_array2_tester<T1, T2>::test(first_param_type p1, second_param_type p2, first_param_type, second_param_type)
 {
    // default construct:
    boost::compressed_pair<T1,T2> cp1;
@@ -312,7 +312,7 @@ struct compressed_pair_array_tester
 };
 
 template <class T1, class T2>
-void compressed_pair_array_tester<T1, T2>::test(first_param_type p1, second_param_type p2, first_param_type p3, second_param_type p4)
+void compressed_pair_array_tester<T1, T2>::test(first_param_type p1, second_param_type p2, first_param_type, second_param_type)
 {
    // default construct:
    boost::compressed_pair<T1,T2> cp1;
@@ -329,7 +329,7 @@ void compressed_pair_array_tester<T1, T2>::test(first_param_type p1, second_para
    BOOST_TEST(sizeof(T2) == sizeof(cp1.second()));
 }
 
-int test_main(int argc, char *argv[ ])
+int test_main(int, char **)
 {
    // declare some variables to pass to the tester:
    non_empty1 ne1(2);
diff --git a/tie_example.cpp b/tie_example.cpp
index cb5af4d..70b4b38 100644
--- a/tie_example.cpp
+++ b/tie_example.cpp
@@ -28,7 +28,7 @@ main(int, char*[])
 {
   {
     typedef std::set<int> SetT;
-    SetT::iterator i, end;
+    SetT::iterator i;
     bool inserted;
     
     int vals[5] = { 5, 2, 4, 9, 1 };