The 'termcap.src' file in the
msys/packages/termcap/1.3.1 directory of the msys
module is not compatible with rxvt.
As a result the --enable-install-termcap option on
configure should not be used by itself.
The short term solution is to not use the
--enable-install-termcap option and add a note to that
A slightly longer term solution would be to replace the
'termcap.src' file in the module.
The best solution would be to make the people who
maintain the underlying termcap package aware of the
problem and assist them to correct the problem.