Merge remote-tracking branch 'origin/5.4' into 5.5

Change-Id: I9ca14dbd9e5d4c192a223a20cfa3a0fd75f20fb7

src/tools/idc/main.cpp

@@ -139,6 +139,8 @@ static bool runWithQtInEnvironment(const QString &cmd)
     }
     CloseHandle(pi.hThread);
     CloseHandle(pi.hProcess);
+    if (exitCode)
+        fprintf(stderr, "\"%s\" returned exit code: %ul\n", qPrintable(cmd), exitCode);
     return exitCode == 0;
 }