So, the cygwin bug report is noted and appreciated. We'll fix this
eventually. However, the "correct" fix is to modify the configury
mechanism which trips up on this in libintl.
I guess I can't get by without giving the long answers to reports
like this... We should add this to the FAQ.
That is, you should check both for the appropriate header, and for the
function. Some (bad) configure.in's check only for "memcpy.h" (or
whatever), but don't check that the function memcpy() can actually be
linked. The right incantation is