Okay, I zapped all existing Chicken install, and downloaded the tarball
of 2.514 from the site. It builds under CMake fine, but then crashes
at install time because posixunix.exports does not exist. I repeated
the make and got told:
Compiling /opt/chicken/chicken-2.514/posixunix.scm
to /opt/chicken/cmake/posixunix.c
Exporting /opt/chicken/cmake/posixunix.exports
all over again, followed by a rebuild of cygchicken-0.dll and the
executables that depend on it. Then the install crashes again at the
same point. So it claims to be making posixunix.exports but isn't.