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+ffcall - foreign function call libraries
+
+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)