Add debug logging for iOS device

lib/irrlicht/source/Irrlicht/CIrrDeviceiOS.h

@@ -138,6 +138,7 @@ namespace irr
         {
             return m_right_padding * m_native_scale;
         }
+        static void debugPrint(const char* line);
     private:
         void createWindow();
         void createViewAndDriver();

lib/irrlicht/source/Irrlicht/CIrrDeviceiOS.mm

@@ -957,6 +957,14 @@ namespace irr
         NSURL* nsurl_val = [NSURL URLWithString:url_nsstring];
         [application openURL:nsurl_val];
     }
+    void CIrrDeviceiOS::debugPrint(const char* line)
+    {
+#ifdef ENABLE_IOS_DEBUG_PRINT
+        NSString* ns = [NSString stringWithCString:line
+            encoding:[NSString defaultCStringEncoding]];
+        NSLog(@"%@", ns);
+#endif
+    }
 }
 
 #ifdef _IRR_COMPILE_WITH_IOS_BUILTIN_MAIN_

src/utils/log.cpp

@@ -30,6 +30,10 @@
 #  include <android/log.h>
 #endif
 
+#ifdef IOS_STK
+#include "../../../lib/irrlicht/source/Irrlicht/CIrrDeviceiOS.h"
+#endif
+
 #ifdef WIN32
 #  define WIN32_LEAN_AND_MEAN
 #  include <windows.h>
@@ -243,6 +247,8 @@ void Log::writeLine(const char *line, int level)
             default:         alp = ANDROID_LOG_FATAL;
             }
             __android_log_print(alp, "SuperTuxKart", "%s", line);
+#elif defined(IOS_STK)
+            CIrrDeviceiOS::debugPrint(line);
 #else
             printf("%s", line);
 #endif