The foreign resource linker, splfr, is used for creating
foreign resources (see Foreign Resources). splfr
reads terms from a Prolog file, applying op declarations and
extracting any foreign_resource/2 fact with first
argument matching the resource name and all foreign/[2,3]
facts. Based on this information, it generates the necessary
glue code, and combines it with any additional C or object files
provided by the user into a linked foreign resource. The output
file name will be the resource name with a suitable extension.