Fix OS X compilation issues

Author: fpw

src/environment/Settings.cpp

@@ -18,6 +18,7 @@
 
 #include <nlohmann/json.hpp>
 #include <iomanip>
+#include <sstream>
 #include "Settings.h"
 #include "src/Logger.h"
 #include "src/platform/Platform.h"
@@ -36,7 +37,7 @@ Settings::Settings(const std::string &settingsFile)
     colorTable.push_back({"BLUE",   0xFF0000A0});
     colorTable.push_back({"GREEN",  0xFF008000});
     colorTable.push_back({"YELLOW", 0xFF808000});
-    
+
     database = std::make_shared<json>();
     init();
     load();
@@ -183,7 +184,7 @@ uint32_t Settings::colorStringToInt(std::string colString, const char* colDefaul
             return i->second;
         }
     }
-    
+
     if ((cstr[0] == '#') && (cstr.size() >= 7)) {
         cstr.erase(0,1);
         uint32_t c = 0;
@@ -197,7 +198,7 @@ uint32_t Settings::colorStringToInt(std::string colString, const char* colDefaul
         if (p == 6) c |= 0xFF000000;// make color opaque if alpha-channel not defined
         if (p) return c;
     }
-    
+
     cstr = colDefault;
     for (auto i = colorTable.begin(); i != colorTable.end(); ++i) {
         if (cstr == i->first) {

src/environment/standalone/StandAloneEnvironment.h

@@ -44,7 +44,7 @@ class StandAloneEnvironment: public Environment {
     std::string getFontDirectory() override;
     std::string getProgramPath() override;
     std::string getSettingsDir() override;
-    void sendUserFixesFilenameToXData(std::string filename);
+    void sendUserFixesFilenameToXData(std::string filename) override;
     std::string getEarthTexturePath() override;
     void runInEnvironment(EnvironmentCallback cb) override;
     std::shared_ptr<xdata::XData> getNavData() override;

src/environment/xplane/XPlaneEnvironment.h

@@ -49,7 +49,7 @@ class XPlaneEnvironment: public Environment {
     std::string getFontDirectory() override;
     std::string getProgramPath() override;
     std::string getSettingsDir() override;
-    void sendUserFixesFilenameToXData(std::string filename);
+    void sendUserFixesFilenameToXData(std::string filename) override;
     std::string getEarthTexturePath() override;
     void runInEnvironment(EnvironmentCallback cb) override;
     std::shared_ptr<xdata::XData> getNavData() override;

src/libxdata/world/models/navaids/UserFix.h

@@ -43,7 +43,6 @@ class UserFix {
 private:
     UserFix::Type type = UserFix::Type::NONE;
     std::string name;
-    int elevation = 0;
 };
 
 } /* namespace xdata */

src/maps/OverlayedUserFix.cpp

@@ -17,6 +17,7 @@
  */
 
 #include "OverlayedUserFix.h"
+#include <cstdlib>
 
 namespace maps {
 
@@ -149,7 +150,7 @@ void OverlayedUserFix::splitNameToLines() {
         std::size_t splitPos = 0;
         std::size_t centre = full_text.size() / 2;
         while (pos != std::string::npos) {
-            if (abs(pos - centre) < abs(splitPos - centre)) {
+            if (abs((int) pos - (int) centre) < abs((int) splitPos - (int) centre)) {
                 splitPos = pos;
             }
             pos = full_text.find_first_of(" ,", pos + 1);