Void-packages: Qt5-5.11.3 GLIBC kernels older than 4.11.0: error while loading shared libraries: libQt5Core.so.5:

[Johnnynator]

System

• xuname:
  Void 4.9.0-8-amd64 x86_64 uptodate F (Debian Kernel, since chroot in Debian system)
• package:
  Qt5-5.11.3

Expected behavior

libQt5Core.so.5 should be loadable.

Actual behavior

/usr/lib/qt5/bin/qdbusxml2cpp: error while loading shared libraries: libQt5Core.so.5: cannot open shared object file: No such file or directory

Steps to reproduce the behavior

Still to figure out Travis breaks reliably: e.g. https://www.travis-ci.com/Johnnynator/void-packages/jobs/165426726

[Johnnynator]

@pullmoll

[Johnnynator]

Displaying notes found in: .note.ABI-tag
  Owner                 Data size       Description
  GNU                  0x00000010       NT_GNU_ABI_TAG (ABI version tag)
    OS: Linux, ABI: 4.11.0

ABI 4.11.0 does not sound good, Older kernel that still are in the repo should be supported

[Johnnynator]

#if QT_CONFIG(statx)
#  define MINLINUX_MAJOR        4
#  define MINLINUX_MINOR        11
#  define MINLINUX_PATCH        0
#elif QT_CONFIG(getentropy)
#  define MINLINUX_MAJOR        3
#  define MINLINUX_MINOR        17
#  define MINLINUX_PATCH        0
#elif QT_CONFIG(renameat2)
...

[pullmoll]

FWIW it works for me, but I'm on kernel 4.19 anyway.

It seems we need to patch the statx detection to support old kernels. I see no file in qtbase/config.tests/* looking for statx so it probably is in qtbase/configure... but I don't see it :-P

Perhaps all that's needed is a CONFIG -= statx for the qmake call.

Or let's patch the lines with 4 and 11 to what we need. 3.16. is the lowest kernel version we have.
But then old kernels won't have the statx syscall, no?

[Johnnynator]

FWIW it works for me, but I'm on kernel 4.19 anyway.

It seems we need to patch the statx detection to support old kernels. I see no file in qtbase/config.tests/* looking for statx so it probably is in qtbase/configure... but I don't see it :-P

Perhaps all that's needed is a CONFIG -= statx for the qmake call.

Or let's patch the lines with 4 and 11 to what we need. 3.16. is the lowest kernel version we have.
But then old kernels won't have the statx syscall, no?

Older kernels don't have it. I'm currently trying to figure out how much of it still works after
https://github.com/qt/qtbase/commit/b7887f9b4faad2227691a2af589e9d7680d6ae08
Also it is set in qtbase/src/corelib/global/qconfig-bootstrapped.h <- disabling there is hopefully enough