qputenv: port to QByteArrayView

The vast majority of in-tree users pass simple and short C string
literals as the value. By porting to QByteArrayView, we document that
we'll accept non-NUL-terminated data, and do the NUL-termination
internally, using SSO'ed std::string, saving memory allocations in the
common case of short strings.

I didn't bother to check which direction std::string takes for
nullptrs these days (there was a change accepted in that area for
C++20 or 23), so play it safe and protect against them.

Follow-up to

Task-number: QTBUG-105302
Change-Id: I2369acc62f1d5cbc26135396cfe0602d8c75300c
Reviewed-by: Sona Kurazyan <sona.kurazyan@qt.io>
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/tests/auto/other/qaccessibilitylinux/tst_qaccessibilitylinux.cpp b/tests/auto/other/qaccessibilitylinux/tst_qaccessibilitylinux.cpp
index 95998cd570..beb0a0805a 100644
--- a/tests/auto/other/qaccessibilitylinux/tst_qaccessibilitylinux.cpp
+++ b/tests/auto/other/qaccessibilitylinux/tst_qaccessibilitylinux.cpp
@@ -55,7 +55,7 @@ class tst_QAccessibilityLinux : public QObject
 public:
     tst_QAccessibilityLinux() : m_window(0), root(0), rootApplication(0), mainWindow(0)
     {
-        qputenv("QT_LINUX_ACCESSIBILITY_ALWAYS_ON", QByteArrayLiteral("1"));
+        qputenv("QT_LINUX_ACCESSIBILITY_ALWAYS_ON", "1");
         dbus = new DBusConnection();
     }
     ~tst_QAccessibilityLinux()