bug#74387: Cannot use Make conditionals (was: Cannot nest Make conditionals inside Automake conditionals)

Hi Maxim - thanks for the report and doing the research to find that old
answer. Do you have any ideas for a better solution? I can't think of
one. We can't change Automake syntax now. Nor does it seem maintainble
for automake to have special knowledge of all of make's builtin
conditionals and match them too.

I'll see about adding something to the manual about the workaround,
at least. --thanks, karl.