fix missing algorithm imports under some compilation schemes.

CMakeLists.txt

@@ -64,11 +64,12 @@ set(HAVE_LIBSTDCPP_UNORDERED_COLLECTIONS FALSE)
 
 set(HAVE_BOOST_UNORDERED_COLLECTIONS FALSE)
 
-find_package(Boost 1.40)
-include_directories(${Boost_INCLUDE_DIRS})
+
 
 if(CARVE_BOOST_COLLECTIONS)
-  set(HAVE_BOOST_UNORDERED_COLLECTIONS TRUE)
+find_package(Boost 1.40)
+include_directories(${Boost_INCLUDE_DIRS})
+set(HAVE_BOOST_UNORDERED_COLLECTIONS TRUE)
 
 else(CARVE_BOOST_COLLECTIONS)
   # attempt to work out which unordered collection implementation we can use

include/carve/mesh_impl.hpp

@@ -20,7 +20,7 @@
 #include <carve/geom2d.hpp>
 #include <carve/geom3d.hpp>
 #include <carve/djset.hpp>
-
+#include <algorithm>
 #include <iostream>
 #include <deque>
 

include/carve/polyhedron_impl.hpp

@@ -18,6 +18,7 @@
 #pragma once
 
 #include <carve/timing.hpp>
+#include <algorithm>
 
 #include <assert.h>
 #include <list>

include/carve/rtree.hpp

@@ -23,7 +23,7 @@
 #include <carve/aabb.hpp>
 
 #include <iostream>
-
+#include <algorithm>
 #include <cmath>
 #include <limits>
 

include/carve/vector.hpp

@@ -24,7 +24,7 @@
 #include <carve/geom3d.hpp>
 
 #include <sstream>
-
+#include <algorithm>
 #include <math.h>
 
 namespace carve {

lib/mesh.cpp

@@ -22,7 +22,7 @@
 #include <carve/mesh.hpp>
 #include <carve/mesh_impl.hpp>
 #include <carve/rtree.hpp>
-
+#include <algorithm>
 #include <carve/poly.hpp>
 
 namespace {

lib/pointset.cpp

@@ -21,6 +21,7 @@
 
 #include <carve/geom.hpp>
 #include <carve/pointset.hpp>
+#include <algorithm>
 
 namespace carve {
   namespace point {

lib/polyline.cpp

@@ -22,6 +22,7 @@
 #include <carve/geom.hpp>
 #include <carve/vector.hpp>
 #include <carve/polyline.hpp>
+#include <algorithm>
 
 namespace carve {
   namespace line {