On Thu, Aug 01, 2013 at 10:49:12PM -0600, Orion Poplawski wrote: > http://doc.qt.digia.com/4.6/qtglobal.html#qreal-typedef > > typedef qreal > > Typedef for double on all platforms except for those using CPUs with > ARM architectures. On ARM-based platforms, qreal is a typedef for > float for performance reasons. [...] > Is double really that much slower on arm? According to: https://developer.android.com/training/articles/perf-tips.html#avoidfloat there's no difference on modern hardware. (Note I didn't verify this.) Judging by a google search for "qreal" "float" "arm" this difference causes endless problems. I even found a Fedora build bug related to it. However it's a matter for upstream to fix it. Not something we could carry around only in Fedora IMHO. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones virt-top is 'top' for virtual machines. Tiny program with many powerful monitoring features, net stats, disk stats, logging, etc. http://people.redhat.com/~rjones/virt-top -- devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/devel Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct
