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Type: User Story
Resolution: Unresolved
Priority: P3: Somewhat important
Fix Version/s: None
Affects Version/s: 5.12.2
Component/s: Core: Date/Time
Labels:
None

Commits:
0fb30652b54aa0d36b9720becd9f3c3deb7a7806 (qt/qtbase/dev)

Many embedded system use uClibc, it use /etc/TZ and optionaly can fallback to /etc/localtime.

Unfortunately at this moment QTimeZone class does not have it support, I prepare simple prototype, I hope this wil be usefull.

src/corelib/tools/qtimezoneprivate_tz.cpp

@@ -1050,6 +1050,20 @@ QByteArray QTzTimeZonePrivate::systemTimeZoneId() const
     if (ianaId == "/etc/localtime")
         ianaId.clear();
 
+#ifdef __UCLIBC__
+    // uclibc use /etc/TZ and support only POSIX timezone
+    // it support fallback to /etc/localtime, but this is optional
+    // http://leaf.sourceforge.net/doc/buci-tz3.html
+    if (ianaId.isEmpty()) {
+        QFile tzif(QStringLiteral("/etc/TZ"));
+        if (tzif.open(QIODevice::ReadOnly)) {
+            QTextStream ts(&tzif);
+            if (!ts.atEnd())
+                ianaId = ts.readLine().toUtf8();
+        }
+    }
+#endif
+
     // On most distros /etc/localtime is a symlink to a real file so extract name from the path