[FIXED] How to determine the platform Qt is running on at runtime?

Issue

Is there a (Qt) way to determine the platform a Qt application is running on at runtime?

Solution

Note that the Q_WS_* macros are defined at compile time, but QSysInfo gives some run time details.

To extend gs's function to get the specific windows version at runtime, you can do

#ifdef Q_WS_WIN
switch(QSysInfo::windowsVersion())
{
  case QSysInfo::WV_2000: return "Windows 2000";
  case QSysInfo::WV_XP: return "Windows XP";
  case QSysInfo::WV_VISTA: return "Windows Vista";
  default: return "Windows";
}
#endif

and similar for Mac.

If you are using a Qt version 5.9 or above, kindly use the below mentioned library function to retrieve correct OS details, more on this can be found here. There is also a QSysInfo class which can do some additional functionalities.

#ifdef Q_WS_WIN
#include <QOperatingSystemVersion>

switch(QOperatingSystemVersion::current())
{
  case QOperatingSystemVersion::Windows7: return "Windows 7";
  case QOperatingSystemVersion::Windows8: return "Windows 8";
  case QOperatingSystemVersion::Windows10: return "Windows 10";
  default: return "Windows";
}
#endif

Answered By - Reed Hedges

Answer Checked By - Gilberto Lyons (PHPFixing Admin)