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)
WWW: http://www.haible.de/bruno/packages-ffcall.html
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