Drop minimum Qt version to 5.2

Author: nyalldawson

CMakeLists.txt

@@ -247,7 +247,7 @@ ELSE (WITH_QTWEBKIT)
 ENDIF(WITH_QTWEBKIT)
 #############################################################
 # search for Qt5
-SET(QT_MIN_VERSION 5.5.0)
+SET(QT_MIN_VERSION 5.2.0)
 FIND_PACKAGE(Qt5Core QUIET)
 FIND_PACKAGE(Qt5Gui REQUIRED)
 FIND_PACKAGE(Qt5Widgets REQUIRED)

src/app/main.cpp

@@ -415,11 +415,11 @@ void myMessageOutput( QtMsgType type, const char *msg )
 #endif
     }
 
-
+#if QT_VERSION >= 0x050500
     case QtInfoMsg:
       myPrint( "Info: %s\n", msg );
       break;
-
+#endif
   }
 }
 

src/core/qgsfontutils.cpp

@@ -439,6 +439,7 @@ QString QgsFontUtils::asCSS( const QFont& font, double pointToPixelScale )
     case QFont::Black:
       cssWeight = 900;
       break;
+#if QT_VERSION >= 0x050500
     case QFont::Thin:
       cssWeight = 100;
       break;
@@ -451,6 +452,7 @@ QString QgsFontUtils::asCSS( const QFont& font, double pointToPixelScale )
     case QFont::ExtraBold:
       cssWeight = 800;
       break;
+#endif
   }
   css += QString( "font-weight: %1;" ).arg( cssWeight );