In case it has been forgotten, with libtool 2.2.6b (and libtool HEAD),
and for software built under Cygwin, 'make check' does not use the DLLs
just built in the tree. Even after installation and with the
installation bin directory first in the executable search PATH, 'make
check' does not use the new DLLs. Instead, 'make check' uses similar
DLLs from Cygwin's /lib directory. Even Cygwin's altered libtool behaves
similarly.
This is annoying at best. :-(
I am not sure how to solve the problem since it may be an artifact of
Windows behavior.
Bob