Index: CMakeLists.txt
===================================================================
--- CMakeLists.txt	(revision 791)
+++ CMakeLists.txt	(revision 997)
@@ -3,4 +3,6 @@
 SET(PROJECT_NAME "LEMON")
 PROJECT(${PROJECT_NAME})
+
+INCLUDE(FindPythonInterp)
 
 IF(EXISTS ${PROJECT_SOURCE_DIR}/cmake/version.cmake)
@@ -10,4 +12,11 @@
 ELSE()
   EXECUTE_PROCESS(
+    COMMAND ${PYTHON_EXECUTABLE} ./scripts/chg-len.py
+    WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
+    OUTPUT_VARIABLE HG_REVISION_PATH
+    ERROR_QUIET
+    OUTPUT_STRIP_TRAILING_WHITESPACE
+  )
+  EXECUTE_PROCESS(
     COMMAND hg id -i
     WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
@@ -17,7 +26,13 @@
   )
   IF(HG_REVISION STREQUAL "")
-    SET(HG_REVISION "hg-tip")
+    SET(HG_REVISION_ID "hg-tip")
+  ELSE()
+    IF(HG_REVISION_PATH STREQUAL "")
+      SET(HG_REVISION_ID ${HG_REVISION})
+    ELSE()
+      SET(HG_REVISION_ID ${HG_REVISION_PATH}.${HG_REVISION})
+    ENDIF()
   ENDIF()
-  SET(LEMON_VERSION ${HG_REVISION} CACHE STRING "LEMON version string.")
+  SET(LEMON_VERSION ${HG_REVISION_ID} CACHE STRING "LEMON version string.")
 ENDIF()
 
@@ -32,11 +47,78 @@
 FIND_PACKAGE(COIN)
 
+IF(DEFINED ENV{LEMON_CXX_WARNING})
+  SET(CXX_WARNING $ENV{LEMON_CXX_WARNING})
+ELSE()
+  IF(CMAKE_COMPILER_IS_GNUCXX)
+    SET(CXX_WARNING "-Wall -W -Wunused -Wformat=2 -Wctor-dtor-privacy -Wnon-virtual-dtor -Wno-char-subscripts -Wwrite-strings -Wno-char-subscripts -Wreturn-type -Wcast-qual -Wcast-align -Wsign-promo -Woverloaded-virtual -ansi -fno-strict-aliasing -Wold-style-cast -Wno-unknown-pragmas")
+    SET(CMAKE_CXX_FLAGS_DEBUG CACHE STRING "-ggdb")
+    SET(CMAKE_C_FLAGS_DEBUG CACHE STRING "-ggdb")
+  ELSEIF(MSVC)
+    # This part is unnecessary 'casue the same is set by the lemon/core.h.
+    # Still keep it as an example.
+    SET(CXX_WARNING "/wd4250 /wd4355 /wd4503 /wd4800 /wd4996")
+    # Suppressed warnings:
+    # C4250: 'class1' : inherits 'class2::member' via dominance
+    # C4355: 'this' : used in base member initializer list
+    # C4503: 'function' : decorated name length exceeded, name was truncated
+    # C4800: 'type' : forcing value to bool 'true' or 'false'
+    #        (performance warning)
+    # C4996: 'function': was declared deprecated
+  ELSE()
+    SET(CXX_WARNING "-Wall -W")
+  ENDIF()
+ENDIF()
+SET(LEMON_CXX_WARNING_FLAGS ${CXX_WARNING} CACHE STRING "LEMON warning flags.")
+
+SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${LEMON_CXX_WARNING_FLAGS}")
+
+SET( CMAKE_CXX_FLAGS_MAINTAINER "-Werror -ggdb" CACHE STRING
+    "Flags used by the C++ compiler during maintainer builds."
+    FORCE )
+SET( CMAKE_C_FLAGS_MAINTAINER "-Werror" CACHE STRING
+    "Flags used by the C compiler during maintainer builds."
+    FORCE )
+SET( CMAKE_EXE_LINKER_FLAGS_MAINTAINER
+    "-Wl,--warn-unresolved-symbols,--warn-once" CACHE STRING
+    "Flags used for linking binaries during maintainer builds."
+    FORCE )
+SET( CMAKE_SHARED_LINKER_FLAGS_MAINTAINER
+    "-Wl,--warn-unresolved-symbols,--warn-once" CACHE STRING
+    "Flags used by the shared libraries linker during maintainer builds."
+    FORCE )
+MARK_AS_ADVANCED(
+    CMAKE_CXX_FLAGS_MAINTAINER
+    CMAKE_C_FLAGS_MAINTAINER
+    CMAKE_EXE_LINKER_FLAGS_MAINTAINER
+    CMAKE_SHARED_LINKER_FLAGS_MAINTAINER )
+
+IF(CMAKE_CONFIGURATION_TYPES)
+  LIST(APPEND CMAKE_CONFIGURATION_TYPES Maintainer)
+  LIST(REMOVE_DUPLICATES CMAKE_CONFIGURATION_TYPES)
+  SET(CMAKE_CONFIGURATION_TYPES "${CMAKE_CONFIGURATION_TYPES}" CACHE STRING
+      "Add the configurations that we need"
+      FORCE)
+ endif()
+
+IF(NOT CMAKE_BUILD_TYPE)
+  SET(CMAKE_BUILD_TYPE "Release")
+ENDIF()
+
+SET( CMAKE_BUILD_TYPE "${CMAKE_BUILD_TYPE}" CACHE STRING
+    "Choose the type of build, options are: None(CMAKE_CXX_FLAGS or CMAKE_C_FLAGS used) Debug Release RelWithDebInfo MinSizeRel Maintainer."
+    FORCE )
+
+
 INCLUDE(CheckTypeSize)
 CHECK_TYPE_SIZE("long long" LONG_LONG)
 SET(LEMON_HAVE_LONG_LONG ${HAVE_LONG_LONG})
 
-INCLUDE(FindPythonInterp)
-
 ENABLE_TESTING()
+
+IF(${CMAKE_BUILD_TYPE} STREQUAL "Maintainer")
+  ADD_CUSTOM_TARGET(check ALL COMMAND ${CMAKE_CTEST_COMMAND})
+ELSE()
+  ADD_CUSTOM_TARGET(check COMMAND ${CMAKE_CTEST_COMMAND})
+ENDIF()
 
 ADD_SUBDIRECTORY(lemon)
@@ -65,5 +147,5 @@
 ENDIF()
 
-IF(${CMAKE_SOURCE_DIR} STREQUAL ${PROJECT_SOURCE_DIR} AND WIN32)
+IF(${CMAKE_SOURCE_DIR} STREQUAL ${PROJECT_SOURCE_DIR})
   SET(CPACK_PACKAGE_NAME ${PROJECT_NAME})
   SET(CPACK_PACKAGE_VENDOR "EGRES")
Index: lemon/network_simplex.h
===================================================================
--- lemon/network_simplex.h	(revision 978)
+++ lemon/network_simplex.h	(revision 991)
@@ -167,6 +167,7 @@
     typedef std::vector<Value> ValueVector;
     typedef std::vector<Cost> CostVector;
-    typedef std::vector<char> BoolVector;
-    // Note: vector<char> is used instead of vector<bool> for efficiency reasons
+    typedef std::vector<signed char> CharVector;
+    // Note: vector<signed char> is used instead of vector<ArcState> and 
+    // vector<ArcDirection> for efficiency reasons
 
     // State constants for arcs
@@ -177,7 +178,9 @@
     };
 
-    typedef std::vector<signed char> StateVector;
-    // Note: vector<signed char> is used instead of vector<ArcState> for
-    // efficiency reasons
+    // Direction constants for tree arcs
+    enum ArcDirection {
+      DIR_DOWN = -1,
+      DIR_UP   =  1
+    };
 
   private:
@@ -218,13 +221,11 @@
     IntVector _succ_num;
     IntVector _last_succ;
+    CharVector _pred_dir;
+    CharVector _state;
     IntVector _dirty_revs;
-    BoolVector _forward;
-    StateVector _state;
     int _root;
 
     // Temporary data used in the current pivot iteration
     int in_arc, join, u_in, v_in, u_out, v_out;
-    int first, second, right, last;
-    int stem, par_stem, new_stem;
     Value delta;
 
@@ -251,5 +252,5 @@
       const IntVector  &_target;
       const CostVector &_cost;
-      const StateVector &_state;
+      const CharVector &_state;
       const CostVector &_pi;
       int &_in_arc;
@@ -303,5 +304,5 @@
       const IntVector  &_target;
       const CostVector &_cost;
-      const StateVector &_state;
+      const CharVector &_state;
       const CostVector &_pi;
       int &_in_arc;
@@ -342,5 +343,5 @@
       const IntVector  &_target;
       const CostVector &_cost;
-      const StateVector &_state;
+      const CharVector &_state;
       const CostVector &_pi;
       int &_in_arc;
@@ -415,5 +416,5 @@
       const IntVector  &_target;
       const CostVector &_cost;
-      const StateVector &_state;
+      const CharVector &_state;
       const CostVector &_pi;
       int &_in_arc;
@@ -518,5 +519,5 @@
       const IntVector  &_target;
       const CostVector &_cost;
-      const StateVector &_state;
+      const CharVector &_state;
       const CostVector &_pi;
       int &_in_arc;
@@ -571,9 +572,11 @@
         // Check the current candidate list
         int e;
+        Cost c;
         for (int i = 0; i != _curr_length; ++i) {
           e = _candidates[i];
-          _cand_cost[e] = _state[e] *
-            (_cost[e] + _pi[_source[e]] - _pi[_target[e]]);
-          if (_cand_cost[e] >= 0) {
+          c = _state[e] * (_cost[e] + _pi[_source[e]] - _pi[_target[e]]);
+          if (c < 0) {
+            _cand_cost[e] = c;
+          } else {
             _candidates[i--] = _candidates[--_curr_length];
           }
@@ -585,7 +588,7 @@
 
         for (e = _next_arc; e != _search_arc_num; ++e) {
-          _cand_cost[e] = _state[e] *
-            (_cost[e] + _pi[_source[e]] - _pi[_target[e]]);
-          if (_cand_cost[e] < 0) {
+          c = _state[e] * (_cost[e] + _pi[_source[e]] - _pi[_target[e]]);
+          if (c < 0) {
+            _cand_cost[e] = c;
             _candidates[_curr_length++] = e;
           }
@@ -634,9 +637,10 @@
     ///
     /// \param graph The digraph the algorithm runs on.
-    /// \param arc_mixing Indicate if the arcs have to be stored in a
+    /// \param arc_mixing Indicate if the arcs will be stored in a
     /// mixed order in the internal data structure.
-    /// In special cases, it could lead to better overall performance,
-    /// but it is usually slower. Therefore it is disabled by default.
-    NetworkSimplex(const GR& graph, bool arc_mixing = false) :
+    /// In general, it leads to similar performance as using the original
+    /// arc order, but it makes the algorithm more robust and in special
+    /// cases, even significantly faster. Therefore, it is enabled by default.
+    NetworkSimplex(const GR& graph, bool arc_mixing = true) :
       _graph(graph), _node_id(graph), _arc_id(graph),
       _arc_mixing(arc_mixing),
@@ -914,5 +918,5 @@
       _parent.resize(all_node_num);
       _pred.resize(all_node_num);
-      _forward.resize(all_node_num);
+      _pred_dir.resize(all_node_num);
       _thread.resize(all_node_num);
       _rev_thread.resize(all_node_num);
@@ -928,5 +932,5 @@
       if (_arc_mixing) {
         // Store the arcs in a mixed order
-        int k = std::max(int(std::sqrt(double(_arc_num))), 10);
+        const int skip = std::max(_arc_num / _node_num, 3);
         int i = 0, j = 0;
         for (ArcIt a(_graph); a != INVALID; ++a) {
@@ -934,5 +938,5 @@
           _source[i] = _node_id[_graph.source(a)];
           _target[i] = _node_id[_graph.target(a)];
-          if ((i += k) >= _arc_num) i = ++j;
+          if ((i += skip) >= _arc_num) i = ++j;
         }
       } else {
@@ -1117,5 +1121,5 @@
           _state[e] = STATE_TREE;
           if (_supply[u] >= 0) {
-            _forward[u] = true;
+            _pred_dir[u] = DIR_UP;
             _pi[u] = 0;
             _source[e] = u;
@@ -1124,5 +1128,5 @@
             _cost[e] = 0;
           } else {
-            _forward[u] = false;
+            _pred_dir[u] = DIR_DOWN;
             _pi[u] = ART_COST;
             _source[e] = _root;
@@ -1144,5 +1148,5 @@
           _last_succ[u] = u;
           if (_supply[u] >= 0) {
-            _forward[u] = true;
+            _pred_dir[u] = DIR_UP;
             _pi[u] = 0;
             _pred[u] = e;
@@ -1154,5 +1158,5 @@
             _state[e] = STATE_TREE;
           } else {
-            _forward[u] = false;
+            _pred_dir[u] = DIR_DOWN;
             _pi[u] = ART_COST;
             _pred[u] = f;
@@ -1185,5 +1189,5 @@
           _last_succ[u] = u;
           if (_supply[u] <= 0) {
-            _forward[u] = false;
+            _pred_dir[u] = DIR_DOWN;
             _pi[u] = 0;
             _pred[u] = e;
@@ -1195,5 +1199,5 @@
             _state[e] = STATE_TREE;
           } else {
-            _forward[u] = true;
+            _pred_dir[u] = DIR_UP;
             _pi[u] = -ART_COST;
             _pred[u] = f;
@@ -1238,4 +1242,5 @@
       // Initialize first and second nodes according to the direction
       // of the cycle
+      int first, second;
       if (_state[in_arc] == STATE_LOWER) {
         first  = _source[in_arc];
@@ -1247,12 +1252,15 @@
       delta = _cap[in_arc];
       int result = 0;
-      Value d;
+      Value c, d;
       int e;
 
-      // Search the cycle along the path form the first node to the root
+      // Search the cycle form the first node to the join node
       for (int u = first; u != join; u = _parent[u]) {
         e = _pred[u];
-        d = _forward[u] ?
-          _flow[e] : (_cap[e] >= MAX ? INF : _cap[e] - _flow[e]);
+        d = _flow[e];
+        if (_pred_dir[u] == DIR_DOWN) {
+          c = _cap[e];
+          d = c >= MAX ? INF : c - d;
+        }
         if (d < delta) {
           delta = d;
@@ -1261,9 +1269,13 @@
         }
       }
-      // Search the cycle along the path form the second node to the root
+
+      // Search the cycle form the second node to the join node
       for (int u = second; u != join; u = _parent[u]) {
         e = _pred[u];
-        d = _forward[u] ?
-          (_cap[e] >= MAX ? INF : _cap[e] - _flow[e]) : _flow[e];
+        d = _flow[e];
+        if (_pred_dir[u] == DIR_UP) {
+          c = _cap[e];
+          d = c >= MAX ? INF : c - d;
+        }
         if (d <= delta) {
           delta = d;
@@ -1290,8 +1302,8 @@
         _flow[in_arc] += val;
         for (int u = _source[in_arc]; u != join; u = _parent[u]) {
-          _flow[_pred[u]] += _forward[u] ? -val : val;
+          _flow[_pred[u]] -= _pred_dir[u] * val;
         }
         for (int u = _target[in_arc]; u != join; u = _parent[u]) {
-          _flow[_pred[u]] += _forward[u] ? val : -val;
+          _flow[_pred[u]] += _pred_dir[u] * val;
         }
       }
@@ -1308,5 +1320,4 @@
     // Update the tree structure
     void updateTreeStructure() {
-      int u, w;
       int old_rev_thread = _rev_thread[u_out];
       int old_succ_num = _succ_num[u_out];
@@ -1314,122 +1325,127 @@
       v_out = _parent[u_out];
 
-      u = _last_succ[u_in];  // the last successor of u_in
-      right = _thread[u];    // the node after it
-
-      // Handle the case when old_rev_thread equals to v_in
-      // (it also means that join and v_out coincide)
-      if (old_rev_thread == v_in) {
-        last = _thread[_last_succ[u_out]];
+      // Check if u_in and u_out coincide
+      if (u_in == u_out) {
+        // Update _parent, _pred, _pred_dir
+        _parent[u_in] = v_in;
+        _pred[u_in] = in_arc;
+        _pred_dir[u_in] = u_in == _source[in_arc] ? DIR_UP : DIR_DOWN;
+
+        // Update _thread and _rev_thread
+        if (_thread[v_in] != u_out) {
+          int after = _thread[old_last_succ];
+          _thread[old_rev_thread] = after;
+          _rev_thread[after] = old_rev_thread;
+          after = _thread[v_in];
+          _thread[v_in] = u_out;
+          _rev_thread[u_out] = v_in;
+          _thread[old_last_succ] = after;
+          _rev_thread[after] = old_last_succ;
+        }
       } else {
-        last = _thread[v_in];
-      }
-
-      // Update _thread and _parent along the stem nodes (i.e. the nodes
-      // between u_in and u_out, whose parent have to be changed)
-      _thread[v_in] = stem = u_in;
-      _dirty_revs.clear();
-      _dirty_revs.push_back(v_in);
-      par_stem = v_in;
-      while (stem != u_out) {
-        // Insert the next stem node into the thread list
-        new_stem = _parent[stem];
-        _thread[u] = new_stem;
-        _dirty_revs.push_back(u);
-
-        // Remove the subtree of stem from the thread list
-        w = _rev_thread[stem];
-        _thread[w] = right;
-        _rev_thread[right] = w;
-
-        // Change the parent node and shift stem nodes
-        _parent[stem] = par_stem;
-        par_stem = stem;
-        stem = new_stem;
-
-        // Update u and right
-        u = _last_succ[stem] == _last_succ[par_stem] ?
-          _rev_thread[par_stem] : _last_succ[stem];
-        right = _thread[u];
-      }
-      _parent[u_out] = par_stem;
-      _thread[u] = last;
-      _rev_thread[last] = u;
-      _last_succ[u_out] = u;
-
-      // Remove the subtree of u_out from the thread list except for
-      // the case when old_rev_thread equals to v_in
-      // (it also means that join and v_out coincide)
-      if (old_rev_thread != v_in) {
-        _thread[old_rev_thread] = right;
-        _rev_thread[right] = old_rev_thread;
-      }
-
-      // Update _rev_thread using the new _thread values
-      for (int i = 0; i != int(_dirty_revs.size()); ++i) {
-        u = _dirty_revs[i];
-        _rev_thread[_thread[u]] = u;
-      }
-
-      // Update _pred, _forward, _last_succ and _succ_num for the
-      // stem nodes from u_out to u_in
-      int tmp_sc = 0, tmp_ls = _last_succ[u_out];
-      u = u_out;
-      while (u != u_in) {
-        w = _parent[u];
-        _pred[u] = _pred[w];
-        _forward[u] = !_forward[w];
-        tmp_sc += _succ_num[u] - _succ_num[w];
-        _succ_num[u] = tmp_sc;
-        _last_succ[w] = tmp_ls;
-        u = w;
-      }
-      _pred[u_in] = in_arc;
-      _forward[u_in] = (u_in == _source[in_arc]);
-      _succ_num[u_in] = old_succ_num;
-
-      // Set limits for updating _last_succ form v_in and v_out
-      // towards the root
-      int up_limit_in = -1;
-      int up_limit_out = -1;
-      if (_last_succ[join] == v_in) {
-        up_limit_out = join;
-      } else {
-        up_limit_in = join;
+        // Handle the case when old_rev_thread equals to v_in
+        // (it also means that join and v_out coincide)
+        int thread_continue = old_rev_thread == v_in ?
+          _thread[old_last_succ] : _thread[v_in];
+
+        // Update _thread and _parent along the stem nodes (i.e. the nodes
+        // between u_in and u_out, whose parent have to be changed)
+        int stem = u_in;              // the current stem node
+        int par_stem = v_in;          // the new parent of stem
+        int next_stem;                // the next stem node
+        int last = _last_succ[u_in];  // the last successor of stem
+        int before, after = _thread[last];
+        _thread[v_in] = u_in;
+        _dirty_revs.clear();
+        _dirty_revs.push_back(v_in);
+        while (stem != u_out) {
+          // Insert the next stem node into the thread list
+          next_stem = _parent[stem];
+          _thread[last] = next_stem;
+          _dirty_revs.push_back(last);
+
+          // Remove the subtree of stem from the thread list
+          before = _rev_thread[stem];
+          _thread[before] = after;
+          _rev_thread[after] = before;
+
+          // Change the parent node and shift stem nodes
+          _parent[stem] = par_stem;
+          par_stem = stem;
+          stem = next_stem;
+
+          // Update last and after
+          last = _last_succ[stem] == _last_succ[par_stem] ?
+            _rev_thread[par_stem] : _last_succ[stem];
+          after = _thread[last];
+        }
+        _parent[u_out] = par_stem;
+        _thread[last] = thread_continue;
+        _rev_thread[thread_continue] = last;
+        _last_succ[u_out] = last;
+
+        // Remove the subtree of u_out from the thread list except for
+        // the case when old_rev_thread equals to v_in
+        if (old_rev_thread != v_in) {
+          _thread[old_rev_thread] = after;
+          _rev_thread[after] = old_rev_thread;
+        }
+
+        // Update _rev_thread using the new _thread values
+        for (int i = 0; i != int(_dirty_revs.size()); ++i) {
+          int u = _dirty_revs[i];
+          _rev_thread[_thread[u]] = u;
+        }
+
+        // Update _pred, _pred_dir, _last_succ and _succ_num for the
+        // stem nodes from u_out to u_in
+        int tmp_sc = 0, tmp_ls = _last_succ[u_out];
+        for (int u = u_out, p = _parent[u]; u != u_in; u = p, p = _parent[u]) {
+          _pred[u] = _pred[p];
+          _pred_dir[u] = -_pred_dir[p];
+          tmp_sc += _succ_num[u] - _succ_num[p];
+          _succ_num[u] = tmp_sc;
+          _last_succ[p] = tmp_ls;
+        }
+        _pred[u_in] = in_arc;
+        _pred_dir[u_in] = u_in == _source[in_arc] ? DIR_UP : DIR_DOWN;
+        _succ_num[u_in] = old_succ_num;
       }
 
       // Update _last_succ from v_in towards the root
-      for (u = v_in; u != up_limit_in && _last_succ[u] == v_in;
-           u = _parent[u]) {
-        _last_succ[u] = _last_succ[u_out];
-      }
+      int up_limit_out = _last_succ[join] == v_in ? join : -1;
+      int last_succ_out = _last_succ[u_out];
+      for (int u = v_in; u != -1 && _last_succ[u] == v_in; u = _parent[u]) {
+        _last_succ[u] = last_succ_out;
+      }
+
       // Update _last_succ from v_out towards the root
       if (join != old_rev_thread && v_in != old_rev_thread) {
-        for (u = v_out; u != up_limit_out && _last_succ[u] == old_last_succ;
+        for (int u = v_out; u != up_limit_out && _last_succ[u] == old_last_succ;
              u = _parent[u]) {
           _last_succ[u] = old_rev_thread;
         }
-      } else {
-        for (u = v_out; u != up_limit_out && _last_succ[u] == old_last_succ;
+      }
+      else if (last_succ_out != old_last_succ) {
+        for (int u = v_out; u != up_limit_out && _last_succ[u] == old_last_succ;
              u = _parent[u]) {
-          _last_succ[u] = _last_succ[u_out];
+          _last_succ[u] = last_succ_out;
         }
       }
 
       // Update _succ_num from v_in to join
-      for (u = v_in; u != join; u = _parent[u]) {
+      for (int u = v_in; u != join; u = _parent[u]) {
         _succ_num[u] += old_succ_num;
       }
       // Update _succ_num from v_out to join
-      for (u = v_out; u != join; u = _parent[u]) {
+      for (int u = v_out; u != join; u = _parent[u]) {
         _succ_num[u] -= old_succ_num;
       }
     }
 
-    // Update potentials
+    // Update potentials in the subtree that has been moved
     void updatePotential() {
-      Cost sigma = _forward[u_in] ?
-        _pi[v_in] - _pi[u_in] - _cost[_pred[u_in]] :
-        _pi[v_in] - _pi[u_in] + _cost[_pred[u_in]];
-      // Update potentials in the subtree, which has been moved
+      Cost sigma = _pi[v_in] - _pi[u_in] -
+                   _pred_dir[u_in] * _cost[in_arc];
       int end = _thread[_last_succ[u_in]];
       for (int u = u_in; u != end; u = _thread[u]) {
Index: test/CMakeLists.txt
===================================================================
--- test/CMakeLists.txt	(revision 999)
+++ test/CMakeLists.txt	(revision 1000)
@@ -119,6 +119,11 @@
 
 FOREACH(TEST_NAME ${TESTS})
-  ADD_EXECUTABLE(${TEST_NAME} ${TEST_NAME}.cc)
+  IF(${CMAKE_BUILD_TYPE} STREQUAL "Maintainer")
+    ADD_EXECUTABLE(${TEST_NAME} ${TEST_NAME}.cc)
+  ELSE()
+    ADD_EXECUTABLE(${TEST_NAME} EXCLUDE_FROM_ALL ${TEST_NAME}.cc)
+  ENDIF()
   TARGET_LINK_LIBRARIES(${TEST_NAME} lemon)
   ADD_TEST(${TEST_NAME} ${TEST_NAME})
+  ADD_DEPENDENCIES(check ${TEST_NAME})
 ENDFOREACH()
