This is a collection of four libraries which can be used to build
foreign function call interfaces in embedded interpreters.

The four packages are:

avcall - calling C functions with variable arguments

vacall - C functions accepting variable argument prototypes

trampoline - closures as first-class C functions

callback - closures with variable arguments as first-class C functions
(a reentrant combination of vacall and trampoline)

This version B includes some minor configuration changes so that files
are installed in the proper place. Also it compiles on cygwin and mingw32.