diff --git a/include/boost/geometry/algorithms/centroid.hpp b/include/boost/geometry/algorithms/centroid.hpp
index 473b54b70..69ad9fe82 100644
--- a/include/boost/geometry/algorithms/centroid.hpp
+++ b/include/boost/geometry/algorithms/centroid.hpp
@@ -191,7 +191,7 @@ struct centroid_range_state
             it != end;
             ++previous, ++it)
         {
-            Strategy::apply(*previous, *it, state);
+            strategy.apply(*previous, *it, state);
         }
     }
 };
@@ -211,7 +211,7 @@ struct centroid_range
                     Closure,
                     Strategy
                 >::apply(range, strategy, state);
-            Strategy::result(state, centroid);
+            strategy.result(state, centroid);
         }
     }
 };
@@ -262,7 +262,7 @@ struct centroid_polygon
                     Polygon,
                     Strategy
                 >::apply(poly, strategy, state);
-            Strategy::result(state, centroid);
+            strategy.result(state, centroid);
         }
     }
 };
diff --git a/include/boost/geometry/algorithms/detail/overlay/enrich_intersection_points.hpp b/include/boost/geometry/algorithms/detail/overlay/enrich_intersection_points.hpp
index 2193104c2..e4842d35f 100644
--- a/include/boost/geometry/algorithms/detail/overlay/enrich_intersection_points.hpp
+++ b/include/boost/geometry/algorithms/detail/overlay/enrich_intersection_points.hpp
@@ -294,9 +294,9 @@ template
 >
 inline void enrich_assign(Container& operations,
             TurnPoints& turn_points,
-            operation_type for_operation,
-            Geometry1 const& geometry1, Geometry2 const& geometry2,
-            Strategy const& strategy)
+            operation_type ,
+            Geometry1 const& , Geometry2 const& ,
+            Strategy const& )
 {
     typedef typename IndexType::type operations_type;
     typedef typename boost::range_iterator<Container const>::type iterator_type;
diff --git a/include/boost/geometry/algorithms/detail/overlay/get_intersection_points.hpp b/include/boost/geometry/algorithms/detail/overlay/get_intersection_points.hpp
index 5456c0cb3..019c3ba3f 100644
--- a/include/boost/geometry/algorithms/detail/overlay/get_intersection_points.hpp
+++ b/include/boost/geometry/algorithms/detail/overlay/get_intersection_points.hpp
@@ -51,7 +51,7 @@ struct get_turn_without_info
     static inline OutputIterator apply(
                 Point1 const& pi, Point1 const& pj, Point1 const& pk,
                 Point2 const& qi, Point2 const& qj, Point2 const& qk,
-                TurnInfo const& tp_model,
+                TurnInfo const& ,
                 OutputIterator out)
     {
         typedef model::referring_segment<Point1 const> segment_type1;
diff --git a/include/boost/geometry/algorithms/detail/overlay/get_turn_info.hpp b/include/boost/geometry/algorithms/detail/overlay/get_turn_info.hpp
index 82798c9fa..4fc91dd0c 100644
--- a/include/boost/geometry/algorithms/detail/overlay/get_turn_info.hpp
+++ b/include/boost/geometry/algorithms/detail/overlay/get_turn_info.hpp
@@ -89,7 +89,7 @@ struct touch_interior : public base_turn_handler
         typename DirInfo
     >
     static inline void apply(
-                Point1 const& pi, Point1 const& pj, Point1 const& pk,
+                Point1 const& pi, Point1 const& pj, Point1 const& ,
                 Point2 const& qi, Point2 const& qj, Point2 const& qk,
                 TurnInfo& ti,
                 IntersectionInfo const& intersection_info,
@@ -399,10 +399,10 @@ struct equal : public base_turn_handler
     >
     static inline void apply(
                 Point1 const& pi, Point1 const& pj, Point1 const& pk,
-                Point2 const& qi, Point2 const& qj, Point2 const& qk,
+                Point2 const& , Point2 const& qj, Point2 const& qk,
                 TurnInfo& ti,
                 IntersectionInfo const& intersection_info,
-                DirInfo const& dir_info)
+                DirInfo const& )
     {
         ti.method = method_equal;
         // Copy the SECOND intersection point
@@ -656,8 +656,8 @@ struct crosses : public base_turn_handler
         typename DirInfo
     >
     static inline void apply(
-                Point1 const& pi, Point1 const& pj, Point1 const& pk,
-                Point2 const& qi, Point2 const& qj, Point2 const& qk,
+                Point1 const& , Point1 const& , Point1 const& ,
+                Point2 const& , Point2 const& , Point2 const& ,
                 TurnInfo& ti,
                 IntersectionInfo const& intersection_info,
                 DirInfo const& dir_info)
@@ -687,7 +687,7 @@ struct crosses : public base_turn_handler
 struct assign_null_policy
 {
     template <typename Point1, typename Point2, typename Info>
-    static inline void apply(Info& info, Point1 const& p1, Point2 const& p2)
+    static inline void apply(Info& , Point1 const& , Point2 const& )
     {}
 
 };
diff --git a/include/boost/geometry/algorithms/detail/overlay/handle_tangencies.hpp b/include/boost/geometry/algorithms/detail/overlay/handle_tangencies.hpp
index 11dde1974..1e878ca52 100644
--- a/include/boost/geometry/algorithms/detail/overlay/handle_tangencies.hpp
+++ b/include/boost/geometry/algorithms/detail/overlay/handle_tangencies.hpp
@@ -93,6 +93,7 @@ private :
     }
 
 
+#ifdef BOOST_GEOMETRY_DEBUG_ENRICH
     inline void debug_consider(int order, Indexed const& left,
             Indexed const& right, std::string const& header,
             bool skip = true,
@@ -101,8 +102,6 @@ private :
     {
         if (skip) return;
 
-
-#ifdef BOOST_GEOMETRY_DEBUG_ENRICH
         point_type pi, pj, ri, rj, si, sj;
         geometry::copy_segment_points<Reverse1, Reverse2>(m_geometry1, m_geometry2,
             left.subject.seg_id,
@@ -151,14 +150,21 @@ private :
             std::cout << " " << extra << " " << (ret ? "true" : "false");
         }
         std::cout << std::endl;
-#endif
     }
+#else
+    inline void debug_consider(int, Indexed const& ,
+            Indexed const& , std::string const& ,
+            bool = true,
+            std::string const& = "", bool = false
+        ) const
+    {}
+#endif
 
 
     // ux/ux
     inline bool consider_ux_ux(Indexed const& left,
             Indexed const& right
-            , std::string const& header
+            , std::string const& // header
         ) const
     {
         bool ret = left.index < right.index;
@@ -190,7 +196,7 @@ private :
     inline bool consider_iu_ux(Indexed const& left,
             Indexed const& right,
             int order // 1: iu first, -1: ux first
-            , std::string const& header
+            , std::string const& // header
         ) const
     {
         bool ret = false;
@@ -234,7 +240,7 @@ private :
     inline bool consider_iu_ix(Indexed const& left,
             Indexed const& right,
             int order // 1: iu first, -1: ix first
-            , std::string const& header
+            , std::string const& // header
         ) const
     {
         //debug_consider(order, left, right, header, false, "iu/ix");
@@ -507,9 +513,9 @@ template
 >
 inline void inspect_cluster(Iterator begin_cluster, Iterator end_cluster,
             TurnPoints& turn_points,
-            operation_type for_operation,
-            Geometry1 const& geometry1, Geometry2 const& geometry2,
-            Strategy const& strategy)
+            operation_type ,
+            Geometry1 const& , Geometry2 const& ,
+            Strategy const& )
 {
     int count = 0;
 
diff --git a/include/boost/geometry/algorithms/detail/overlay/intersection_insert.hpp b/include/boost/geometry/algorithms/detail/overlay/intersection_insert.hpp
index 70a3653c4..bb05eb155 100644
--- a/include/boost/geometry/algorithms/detail/overlay/intersection_insert.hpp
+++ b/include/boost/geometry/algorithms/detail/overlay/intersection_insert.hpp
@@ -86,7 +86,7 @@ struct intersection_linestring_linestring_point
 {
     static inline OutputIterator apply(Linestring1 const& linestring1,
             Linestring2 const& linestring2, OutputIterator out,
-            Strategy const& strategy)
+            Strategy const& )
     {
         typedef typename point_type<PointOut>::type point_type;
 
diff --git a/include/boost/geometry/algorithms/detail/overlay/select_rings.hpp b/include/boost/geometry/algorithms/detail/overlay/select_rings.hpp
index bde9262cf..f664b1951 100644
--- a/include/boost/geometry/algorithms/detail/overlay/select_rings.hpp
+++ b/include/boost/geometry/algorithms/detail/overlay/select_rings.hpp
@@ -40,7 +40,7 @@ namespace dispatch
     struct select_rings<box_tag, Box>
     {
         template <typename Geometry, typename Map>
-        static inline void apply(Box const& box, Geometry const& geometry, 
+        static inline void apply(Box const& box, Geometry const& , 
                 ring_identifier const& id, Map& map, bool midpoint)
         {
             map[id] = typename Map::mapped_type(box, midpoint);
@@ -58,7 +58,7 @@ namespace dispatch
     struct select_rings<ring_tag, Ring>
     {
         template <typename Geometry, typename Map>
-        static inline void apply(Ring const& ring, Geometry const& geometry,
+        static inline void apply(Ring const& ring, Geometry const& ,
                     ring_identifier const& id, Map& map, bool midpoint)
         {
             if (boost::size(ring) > 0)
@@ -129,7 +129,7 @@ template<>
 struct decide<overlay_union>
 {
     template <typename Code>
-    static bool include(ring_identifier const& id, Code const& code)
+    static bool include(ring_identifier const& , Code const& code)
     {
         return code.within_code * -1 == 1;
     }
@@ -162,7 +162,7 @@ template<>
 struct decide<overlay_intersection>
 {
     template <typename Code>
-    static bool include(ring_identifier const& id, Code const& code)
+    static bool include(ring_identifier const& , Code const& code)
     {
         return code.within_code * 1 == 1;
     }
diff --git a/include/boost/geometry/algorithms/detail/overlay/traverse.hpp b/include/boost/geometry/algorithms/detail/overlay/traverse.hpp
index ab594e93e..12daafa0c 100644
--- a/include/boost/geometry/algorithms/detail/overlay/traverse.hpp
+++ b/include/boost/geometry/algorithms/detail/overlay/traverse.hpp
@@ -37,10 +37,10 @@ namespace detail { namespace overlay
 {
 
 template <typename Turn, typename Operation>
+#ifdef BOOST_GEOMETRY_DEBUG_TRAVERSE
 inline void debug_traverse(Turn const& turn, Operation op, 
                 std::string const& header)
 {
-#ifdef BOOST_GEOMETRY_DEBUG_TRAVERSE
     std::cout << header
         << " at " << op.seg_id
         << " meth: " << method_char(turn.method)
@@ -55,8 +55,12 @@ inline void debug_traverse(Turn const& turn, Operation op,
     {
         std::cout << std::endl;
     }
-#endif
 }
+#else
+inline void debug_traverse(Turn const& , Operation, std::string const& )
+{
+}
+#endif
 
 
 template <typename Info, typename Turn>
diff --git a/include/boost/geometry/algorithms/detail/sections/range_by_section.hpp b/include/boost/geometry/algorithms/detail/sections/range_by_section.hpp
index 24a889516..ad62f232b 100644
--- a/include/boost/geometry/algorithms/detail/sections/range_by_section.hpp
+++ b/include/boost/geometry/algorithms/detail/sections/range_by_section.hpp
@@ -36,7 +36,7 @@ namespace detail { namespace section
 template <typename Range, typename Section>
 struct full_section_range
 {
-    static inline Range const& apply(Range const& range, Section const& section)
+    static inline Range const& apply(Range const& range, Section const& )
     {
         return range;
     }
diff --git a/include/boost/geometry/policies/relate/direction.hpp b/include/boost/geometry/policies/relate/direction.hpp
index 2ed1cc608..ba190fa04 100644
--- a/include/boost/geometry/policies/relate/direction.hpp
+++ b/include/boost/geometry/policies/relate/direction.hpp
@@ -241,7 +241,7 @@ struct segments_direction
         return return_type('p', false);
     }
 
-    static inline return_type error(std::string const& msg)
+    static inline return_type error(std::string const&)
     {
         // msg
         return return_type('d', false);
diff --git a/include/boost/geometry/policies/relate/intersection_points.hpp b/include/boost/geometry/policies/relate/intersection_points.hpp
index 2c15f1e1d..5d282b003 100644
--- a/include/boost/geometry/policies/relate/intersection_points.hpp
+++ b/include/boost/geometry/policies/relate/intersection_points.hpp
@@ -120,7 +120,7 @@ struct segments_intersection_points
         return collinear_inside(s, index1, 1 - index1);
     }
 
-    static inline return_type collinear_a_in_b(S1 const& s, bool opposite)
+    static inline return_type collinear_a_in_b(S1 const& s, bool)
     {
         return collinear_inside(s);
     }
@@ -144,7 +144,7 @@ struct segments_intersection_points
         return result;
     }
 
-    static inline return_type segment_equal(S1 const& s, bool opposite)
+    static inline return_type segment_equal(S1 const& s, bool)
     {
         return_type result;
         result.count = 2;
@@ -160,7 +160,7 @@ struct segments_intersection_points
     {
         return return_type();
     }
-    static inline return_type error(std::string const& msg)
+    static inline return_type error(std::string const&)
     {
         return return_type();
     }