bug in src/Makefile.in EXTW_LINK()

Hi- I have been gone for a while, but now I'm back. I'm at a new job, where we use XEmacs external widgets for our applications. 20.4 external widget doesn't compile frame-x.c, but the fix was simple, and I see that the change is in 21.0-b41. On the other hand, src/Makefile.in (lines 229--248) has a #define construct for EXTW_LINK(). This is in both 20.4 and 21.0-b41. This function-style #define does not work, since on line 70, there is a `#define NOT_C_CODE', and I think that this makes function macros fail. Anyway, this is easily seen by looking in the generated src/Makefile (given a configure --external-widget). I am not sure what the best way to fix this is. In order to build, I have an ugly hack, but I don't want other people to see it. Can someone give me a hand with this? I would really like to have this fixed officially. Thanks a lot. -- Colin