On Sunday, 5 June 2022 17:54:15 PDT Thiago Macieira wrote: > On Sunday, 5 June 2022 17:48:05 PDT Chris Benesch wrote: > > After struggling for almost 2 weeks I finally got QT 6.2.4 to work on > > AlmaLinux 8. > > Is this using the broken Red Hat 8's 4.18 kernel? > > If so, downgrade it back to a couple of months ago or upgrade it again to > release 392. Red Hat botched the backport of the pidfd feature, which is > what broke QProcess. > > https://bugzilla.redhat.com/show_bug.cgi?id=2044587 > https://bugreports.qt.io/browse/QTBUG-100174
If changing the kernel is not an option, you can just denature the pidfd detection code in qtbase so it fails to detect its (broken) availability. In https://code.woboq.org/qt6/qtbase/src/3rdparty/forkfd/ forkfd_linux.c.html#_ZL26detect_clone_pidfd_supportv, change the return to -1. Unfortunately, I have no good way to properly detect the brokenness of the kernel at runtime. Please see the QTBUG for more information, where I think I explored the possibilities. There's one that would work, but I preferred not to apply it because Red Hat was aware of the problem and was working on a solution, so it was meant to be temporary... ... except it took them far longer to actually fix the issue than we had anticipated. It wasn't a matter of backporting the patches that they hadn't previously backported. -- Thiago Macieira - thiago.macieira (AT) intel.com Cloud Software Architect - Intel DCAI Cloud Engineering _______________________________________________ Interest mailing list Interest@qt-project.org https://lists.qt-project.org/listinfo/interest
