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Interfacing to C++

Functions in C++ files which should be called from Prolog must use C linkage, e.g.

extern "C" {
void myfun(long i)
{...};
};

To build a dynamic linked foreign resource with C++ code, you may (depending on platform) have to explicitly include certain libraries. E.g. on Sparc/SunOS 5.X using gcc:

% splfr .... -LD -L/usr/gnu/lib/gcc-lib/sparc-sun-solaris2.4/2.7.0 -lgcc

The library path is installation dependent, of course.