From 68ec24797b54aee72f2e5d50f77bc646140e085c Mon Sep 17 00:00:00 2001
From: Olivier Goffart <ogoffart@woboq.com>
Date: Wed, 4 Feb 2015 13:43:02 +0100
Subject: [PATCH] Add some define.

Since Qt5.4, on release build, qDebug do not provide anymore the line
number unless we define QT_MESSAGELOGCONTEXT

Also define QT_USE_QSTRINGBUILDER while i'm on it (free optimisation)
---
 cmake/modules/QtVersionAbstraction.cmake | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/cmake/modules/QtVersionAbstraction.cmake b/cmake/modules/QtVersionAbstraction.cmake
index 51b1dd181..020aab4ea 100644
--- a/cmake/modules/QtVersionAbstraction.cmake
+++ b/cmake/modules/QtVersionAbstraction.cmake
@@ -103,6 +103,9 @@ endif()
 
     #Enable deprecated symbols
     add_definitions("-DQT_DISABLE_DEPRECATED_BEFORE=0")
+
+    add_definitions("-DQT_USE_QSTRINGBUILDER") #optimize string concatenation
+    add_definitions("-DQT_MESSAGELOGCONTEXT") #enable function name and line number in debug output
 endif( Qt5Core_FOUND )
 
 if(NOT Qt5Core_FOUND)