I am trying to run USB CDC virtual com demo app on FRDMKL27Z board. I followed the instructions from pdf (from SDK 1.3), built KSDK platform and USB core libraries for MKL27Z644. Demo app from bare metal builds correctly (with ARM GCC 4.9.3 20150529), but there is no output. Windows 10 crashes on connection to COM port, on OSX and Linux (Arch & Korora) terminal is silent - no character appears in terminal and nothing is echoed. There is no output on debug console either. GDB shows that app is endlessly looping in OSA_Start and the only task in g_taskListHead is (task_t) 0x0 <__isr_vector>. Virtual_Com_App function is never entered.
Did I miss a step? Does anyone know how to make the demo app work?