From 52c0c4efccee5388b64ead635c7c973713e75318 Mon Sep 17 00:00:00 2001
From: Thiago Macieira <thiago.macieira@intel.com>
Date: Tue, 28 Jan 2020 16:59:59 -0800
Subject: [PATCH] QLockFile: Disable flock() on QNX

It appears it's not implemented.

[ChangeLog][QtCore][QLockFile] Suppressed the warning on QNX that said
'setNativeLocks failed: "Function not implemented"'. There is no
difference in behavior: Qt will continue not to be able to apply an OS-
level file lock, which means the lock could be accidentally stolen by
buggy software. Correct software using QLockFile should not be affected.

Fixes: QTBUG-81701
Change-Id: If79a52e476594446baccfffd15ee35bbac6c6e47
Reviewed-by: David Faure <david.faure@kdab.com>
(cherry picked from commit 9ede07613dc5b7759f398d5a8839b2ffdb4675a2)
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
---
 src/corelib/io/qlockfile_unix.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/corelib/io/qlockfile_unix.cpp b/src/corelib/io/qlockfile_unix.cpp
index 418b7d22bad..14fa0440899 100644
--- a/src/corelib/io/qlockfile_unix.cpp
+++ b/src/corelib/io/qlockfile_unix.cpp
@@ -58,6 +58,12 @@
 #include <sys/file.h>  // flock
 #endif
 
+#if defined(Q_OS_RTEMS) || defined(Q_OS_QNX)
+// flock() does not work in these OSes and produce warnings when we try to use
+#  undef LOCK_EX
+#  undef LOCK_NB
+#endif
+
 #include <sys/types.h> // kill
 #include <signal.h>    // kill
 #include <unistd.h>    // gethostname