show running qt version if it differs from compiled version (#5501)

src/common/Version.cpp

@@ -1,11 +1,15 @@
 #include "common/Version.hpp"
 
+#include "common/Literals.hpp"
 #include "common/Modes.hpp"
 
 #include <QFileInfo>
+#include <QStringBuilder>
 
 namespace chatterino {
 
+using namespace literals;
+
 Version::Version()
     : version_(CHATTERINO_VERSION)
     , commitHash_(QStringLiteral(CHATTERINO_GIT_HASH))
@@ -79,11 +83,17 @@ QStringList Version::buildTags() const
 {
     QStringList tags;
 
-    tags.append("Qt " QT_VERSION_STR);
+    const auto *runtimeVersion = qVersion();
+    if (runtimeVersion != QLatin1String{QT_VERSION_STR})
+    {
+        tags.append(u"Qt "_s QT_VERSION_STR u" (running on " % runtimeVersion %
+                    u")");
+    }
+    else
+    {
+        tags.append(u"Qt "_s QT_VERSION_STR);
+    }
 
-#ifdef USEWINSDK
-    tags.append("Windows SDK");
-#endif
 #ifdef _MSC_FULL_VER
     tags.append("MSVC " + QString::number(_MSC_FULL_VER, 10));
 #endif