iwyu and fix compile on linux

tests/cpp_tests/agg_blend_src_over_test.cpp

@@ -5,6 +5,7 @@
 #include <sstream>
 #include <string>
 #include <vector>
+#include <algorithm>
 #include "agg_color_rgba.h"
 #include "agg_pixfmt_rgba.h"
 #include "agg_rendering_buffer.h"

tests/cpp_tests/clipping_test.cpp

@@ -13,6 +13,7 @@
 #include <iostream>
 #include <fstream>
 #include <vector>
+#include <algorithm>
 
 // agg
 #include "agg_conv_clip_polygon.h"

tests/cpp_tests/conversions_test.cpp

@@ -4,6 +4,7 @@
 #include <boost/detail/lightweight_test.hpp>
 #include <iostream>
 #include <vector>
+#include <algorithm>
 
 int main(int argc, char** argv)
 {

tests/cpp_tests/csv_parse_test.cpp

@@ -4,6 +4,7 @@
 #include "plugins/input/csv/csv_datasource.hpp"
 #include <mapnik/params.hpp>
 #include <vector>
+#include <algorithm>
 
 int main(int argc, char** argv)
 {

tests/cpp_tests/exceptions_test.cpp

@@ -20,6 +20,7 @@
 #include <mapnik/datasource_cache.hpp>
 #include <mapnik/params.hpp>
 #include <vector>
+#include <algorithm>
 
 extern "C" {
 #include <sqlite3.h>

tests/cpp_tests/font_registration_test.cpp

@@ -8,6 +8,7 @@ namespace sys = boost::system;
 #include <iostream>
 #include <mapnik/font_engine_freetype.hpp>
 #include <vector>
+#include <algorithm>
 
 int main(int argc, char** argv)
 {

tests/cpp_tests/fontset_runtime_test.cpp

@@ -18,7 +18,7 @@
 #include <mapnik/color_factory.hpp>
 #include <mapnik/save_map.hpp>
 #include <vector>
-
+#include <algorithm>
 
 int main(int argc, char** argv)
 {

tests/cpp_tests/geometry_converters_test.cpp

@@ -18,6 +18,7 @@
 #include <boost/detail/lightweight_test.hpp>
 #include <iostream>
 #include <vector>
+#include <algorithm>
 
 struct output_geometry_backend
 {

tests/cpp_tests/image_io_test.cpp

@@ -9,6 +9,7 @@ namespace sys = boost::system;
 #include <mapnik/image_reader.hpp>
 #include <mapnik/image_util.hpp>
 #include <vector>
+#include <algorithm>
 
 int main(int argc, char** argv)
 {

tests/cpp_tests/label_algo_test.cpp

@@ -4,7 +4,7 @@
 #include <mapnik/geometry.hpp>
 #include <mapnik/geom_util.hpp>
 #include <vector>
-
+#include <algorithm>
 
 int main(int argc, char** argv)
 {

tests/cpp_tests/map_request_test.cpp

@@ -19,6 +19,7 @@
 #include <mapnik/feature_style_processor.hpp>
 #include <boost/foreach.hpp>
 #include <vector>
+#include <algorithm>
 
 bool compare_images(std::string const& src_fn,std::string const& dest_fn)
 {

tests/cpp_tests/params_test.cpp

@@ -5,6 +5,7 @@
 #include <mapnik/params.hpp>
 #include <mapnik/boolean.hpp>
 #include <vector>
+#include <algorithm>
 #include <boost/variant.hpp>
 
 int main(int argc, char** argv)

tests/cpp_tests/wkb_formats_test.cpp

@@ -6,6 +6,7 @@
 #include <mapnik/feature.hpp>
 #include <mapnik/feature_factory.hpp>
 #include <vector>
+#include <algorithm>
 
 
 int main(int argc, char** argv)