diff -r dee5afe5301f -r 3f74d0d4af4c src/gui/painting/qmath_p.h
--- a/src/gui/painting/qmath_p.h	Mon Mar 15 12:43:09 2010 +0200
+++ b/src/gui/painting/qmath_p.h	Thu Apr 08 14:19:33 2010 +0300
@@ -54,6 +54,7 @@
 //
 
 #include <math.h>
+#include <qmath.h>
 
 QT_BEGIN_NAMESPACE
 
@@ -61,6 +62,11 @@
 static const qreal Q_2PI  = qreal(6.28318530717958647693);   // 2*pi
 static const qreal Q_PI2  = qreal(1.57079632679489661923);   // pi/2
 
+inline int qIntSqrtInt(int v)
+{
+    return static_cast<int>(qSqrt(static_cast<qreal>(v)));
+}
+
 QT_END_NAMESPACE
 
 #endif // QMATH_P_H