I found the same issue with emWin 5.30c (I have Cortex-M3 and use LPCXpresso 10.3.0). So, I changed emWin to 5.38b in my project and got:
D:\Workspace\W_M_v7_MCU10_3\Weicont_MS\Debug/../src/GUI/Application/Modules/InitGUI.c:43: undefined reference to `GUI_VNC_X_StartServer'
collect2.exe: error: ld returned 1 exit status
Of course I'd included GUI_VNC.h before that.
If I delete
GUI_VNC_X_StartServer(0, 0);
then everything works fine. So I linked emWin as proper.
So, are there the same problem in precompiled emWin 5.38b? Were VNC support deleted from precompiled library?
Could it be restored? Are there any plans to release newer versions of precompiled emWin with VNC support on NXP web site?