A gcc puzzle for the experts

[walt]

Chris Pressey wrote:

What happens if you change the #elif line to just "#else" ?
I tried changing the code twice, once for each of the conditional
lines in the ifdef clause -- I got the usual sort of 'structure has
no member foobar' error both times.  I.e. *both* choices were wrong
for DFly (but the syntax error did go away).
This (to me) implies that some code upstream from this is where the
real error lies, but I have no clue where it might be.  I've replaced
every instance of __FreeBSD__ anywhere it occurs and I still get the
same error.