min compiler is g++ 4.8 - refs #2486

INSTALL.md

@@ -50,7 +50,7 @@ For troubleshooting help see https://github.com/mapnik/mapnik/wiki/InstallationT
 
 Build system dependencies are:
 
- * C++ compiler (like g++ or clang++)
+ * C++ compiler supporting `-std=c++11` (like >= g++ 4.8 or >= clang++ 3.4)
  * >= 2 GB RAM (> 5 GB for g++)
  * Python 2.4-2.7 
  * Scons (a copy is bundled)

src/agg/process_debug_symbolizer.cpp

@@ -65,6 +65,7 @@ void agg_renderer<T0,T1>::process(debug_symbolizer const& sym,
             draw_rect(pixmap_, itr->box);
         }
     }
+    // TODO - random color per feature
     else if (mode == DEBUG_SYM_MODE_VERTEX)
     {
         for (auto const& geom : feature.paths())

src/load_map.cpp

@@ -495,6 +495,13 @@ void map_parser::parse_fontset(Map & map, xml_node const& node)
                 {
                     success = true;
                 }
+                else
+                {
+                    // https://github.com/mapnik/mapnik/issues/1791
+                    MAPNIK_LOG_ERROR(fontset) << "warning: unable to find face-name '"
+                                              << n.get_attr<std::string>("face-name","")
+                                              << "' in FontSet '" << fontset.get_name() << "'";
+                }
             }
         }
 

tests/visual_tests/styles/hb-fontsets.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!DOCTYPE Map>
 <Map background-color="white" srs="+proj=latlong +datum=WGS84"
-     font-directory="../fonts/KhmerOS/">
+     >
 
     <Layer name="layer" srs="+proj=latlong +datum=WGS84">
             <StyleName>My Style</StyleName>