Merge remote-tracking branch 'origin/5.5' into 5.6

Conflicts:
	src/network/socket/qabstractsocket.cpp
	src/plugins/platforms/winrt/qwinrtscreen.cpp
	src/sql/drivers/mysql/qsql_mysql.cpp

Change-Id: Ifb73623d09f53340ee5e10283f1f86b580998902

1 files changed, 4 insertions, 2 deletions

diff --git a/src/corelib/io/qlockfile_unix.cpp b/src/corelib/io/qlockfile_unix.cpp
index 019059917a..365f3e07ab 100644
--- a/src/corelib/io/qlockfile_unix.cpp
+++ b/src/corelib/io/qlockfile_unix.cpp
@@ -171,8 +171,10 @@ QLockFile::LockError QLockFilePrivate::tryLock_sys()
         }
     }
     // Ensure nobody else can delete the file while we have it
-    if (!setNativeLocks(fd))
-        qWarning() << "setNativeLocks failed:" << strerror(errno);
+    if (!setNativeLocks(fd)) {
+        const int errnoSaved = errno;
+        qWarning() << "setNativeLocks failed:" << qt_error_string(errnoSaved);
+    }
 
     if (qt_write_loop(fd, fileData.constData(), fileData.size()) < fileData.size()) {
         close(fd);