Dear Earnie,
Thank you for your reply.
I'd like to inform you that I probably resolved the notorious problem
connected with the usage of GNU autoconf under Cygwin. (If you remember
__oline__ wasn't properly substituted.) After I had installed GNU awk all
became to work properly. I didn't see into autoconf deeply, I just noted
that some fragment of C code was processed by awk. I'd like to note that
when I run configure script for autoconf (to install it) it said that awk
wasn't found, nevertheless configure finished successfully. May be it's a
bug? I know that configure script shouldn't create Makefile if some
necessary packages (like awk) is not installed before.
Sincerely yours,
Andrew Makhorin