qt: turn off features if not supported by the kernel (#27438)

If building Qt on a system with a recent glibc but an older kernel, it
is possible that Qt configures features based on glibc that are not
supported in the kernel. This PR tests the kernel version and ensures
certain features are disabled if the kernel does not support them.

1 files changed, 16 insertions, 0 deletions

diff --git a/var/spack/repos/builtin/packages/qt/package.py b/var/spack/repos/builtin/packages/qt/package.py
index 2b96ddde3d..324d29ad42 100644
--- a/var/spack/repos/builtin/packages/qt/package.py
+++ b/var/spack/repos/builtin/packages/qt/package.py
@@ -4,6 +4,7 @@
 # SPDX-License-Identifier: (Apache-2.0 OR MIT)
 import itertools
 import os
+import platform
 import sys
 
 import llnl.util.tty as tty
@@ -12,6 +13,7 @@ from spack import *
 from spack.operating_systems.mac_os import macos_version
 
 MACOS_VERSION = macos_version() if sys.platform == 'darwin' else None
+LINUX_VERSION = Version(platform.release()) if platform.system() == 'Linux' else None
 
 
 class Qt(Package):
@@ -637,6 +639,20 @@ class Qt(Package):
                 config_args.append('-I{0}/include'.format(spec['libx11'].prefix))
                 config_args.append('-I{0}/include'.format(spec['xproto'].prefix))
 
+        # If the version of glibc is new enough Qt will configure features that
+        # may not be supported by the kernel version on the system. This will
+        # cause errors like:
+        #   error while loading shared libraries: libQt5Core.so.5: cannot open
+        #   shared object file: No such file or directory
+        # Test the kernel version and disable features that Qt detects in glibc
+        # but that are not supported in the kernel as determined by information
+        # in: qtbase/src/corelib/global/minimum-linux_p.h.
+        if LINUX_VERSION and version >= Version('5.10'):
+            if LINUX_VERSION < Version('3.16'):
+                config_args.append('-no-feature-renameat2')
+            if LINUX_VERSION < Version('3.17'):
+                config_args.append('-no-feature-getentropy')
+
         if '~webkit' in spec:
             config_args.extend([
                 '-skip',