Use C++ <cmath> instead of <math.h>

Including math.h can pollute the default namespace, and break
some compilers if cmath versions of the method are declared as using.

Switching to C++ math functions also greatly simplifies handling of
float qreal as C++ automatically chooses the right method.

[ChangeLog][QtCore][QtMath] qmath.h no longer includes math.h, so any
sources depending on that indirect inclusion may fail to build.

Change-Id: I4d0e331dafba354ec05dc5052e61ef4ff8d387fe
Reviewed-by: Rafael Roquetto <rafael.roquetto@kdab.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/src/gui/opengl/qtriangulatingstroker_p.h b/src/gui/opengl/qtriangulatingstroker_p.h
index 2561810d7a..dd46cbe1e5 100644
--- a/src/gui/opengl/qtriangulatingstroker_p.h
+++ b/src/gui/opengl/qtriangulatingstroker_p.h
@@ -134,11 +134,11 @@ inline void QTriangulatingStroker::normalVector(float x1, float y1, float x2, fl
     float pw;
 
     if (dx == 0)
-        pw = m_width / qAbs(dy);
+        pw = m_width / std::abs(dy);
     else if (dy == 0)
-        pw = m_width / qAbs(dx);
+        pw = m_width / std::abs(dx);
     else
-        pw = m_width / sqrt(dx*dx + dy*dy);
+        pw = m_width / std::sqrt(dx*dx + dy*dy);
 
     *nx = -dy * pw;
     *ny = dx * pw;