QEvdevGamepadDevice: use std::abs() instead of fabs()

Both includes were missing, so GCC complained that fabs() was not
declared.

Fix by including <cmath> and using std::abs() instead.

Change-Id: Ifc717bd68d3572e114937712c867c3d004c1fa2e
Reviewed-by: BogDan Vatra <bogdan@kdab.com>

1 files changed, 5 insertions, 3 deletions

diff --git a/src/plugins/gamepads/evdev/qevdevgamepadbackend.cpp b/src/plugins/gamepads/evdev/qevdevgamepadbackend.cpp
index 4ba299c..1ad6b46 100644
--- a/src/plugins/gamepads/evdev/qevdevgamepadbackend.cpp
+++ b/src/plugins/gamepads/evdev/qevdevgamepadbackend.cpp
@@ -41,6 +41,8 @@
 #include <QtCore/private/qcore_unix_p.h>
 #include <linux/input.h>
 
+#include <cmath>
+
 QT_BEGIN_NAMESPACE
 
 Q_LOGGING_CATEGORY(lcEGB, "qt.gamepad")
@@ -76,7 +78,7 @@ void QEvdevGamepadDevice::EvdevAxisInfo::setAbsInfo(int fd, int abs)
         minValue = absInfo.minimum;
         maxValue = absInfo.maximum;
         if (maxValue - minValue)
-            flat = fabs(absInfo.flat / double(maxValue - minValue));
+            flat = std::abs(absInfo.flat / double(maxValue - minValue));
     }
 }
 
@@ -443,7 +445,7 @@ void QEvdevGamepadDevice::processInputEvent(input_event *e)
     } else if (e->type == EV_ABS) {
         if (m_configureAxis != QGamepadManager::AxisInvalid) {
             EvdevAxisInfo inf(m_fd, e->code, -32768, 32767, m_configureAxis);
-            if (fabs(inf.normalized(e->value)) == 1) {
+            if (std::abs(inf.normalized(e->value)) == 1) {
                 m_axisMap.insert(e->code, EvdevAxisInfo(m_fd, e->code, -32768, 32767, m_configureAxis));
 
                 QGamepadManager::GamepadAxis axis = m_configureAxis;
@@ -503,7 +505,7 @@ void QEvdevGamepadDevice::processInputEvent(input_event *e)
         if (info.gamepadMaxButton == info.gamepadMinButton &&
                 info.gamepadMaxButton != QGamepadManager::ButtonInvalid) {
             if (val)
-                emit m_backend->gamepadButtonPressed(m_productId, info.gamepadMaxButton, fabs(val));
+                emit m_backend->gamepadButtonPressed(m_productId, info.gamepadMaxButton, std::abs(val));
             else
                 emit m_backend->gamepadButtonReleased(m_productId, info.gamepadMaxButton);
         } else {