When called during the printing of intermediate code, the AddLibrary command declares that the library libraryname is used by the generated code.

Many programming languages rely on external archives or libraries to supply functions for specialized tasks.  Several CodeGeneration translators produce code that relies on such libraries.

To enable the printing of these inclusion statements in your custom translator, call AddLibrary from within the handler procedure in which the code using this library is printed.

LanguageDefinition[Define]("AddLibraryExample", extend="C",
     AddPrintHandler(
         Names:-Inverse = proc(x)
            Printer:-Print( "custom_inv(", x, ")");
            Printer:-AddLibrary( "custom_lib");
         end proc,
         Names:-Negation = proc(x)
            Printer:-Print( "custom_neg(", x, ")");
            Printer:-AddLibrary( "custom_lib");
         end proc,
         Names:-Product = proc()
            Printer:-Print( "custom_mult(" );
            Printer:-PrintDelimitedList( [args], ", ");
            Printer:-Print(")");
            Printer:-AddLibrary( "custom_lib");
         end proc,
         Names:-Sum = proc()
            Printer:-Print( "custom_add(" );
            Printer:-PrintDelimitedList( [args], ", ");
            Printer:-Print(")");
            Printer:-AddLibrary( "custom_lib");
         end proc
     )
);

cg = custom_add(custom_mult(3, x), custom_neg(y));

p := proc(x,y)
   local z;
   z := (sin(x)*y+1)*Pi;
   printf("%f", z);
end proc:

void p (double x, double y)
{
  double z;
  z = custom_mult(custom_add(custom_mult(sin(x), y), 0.1e1), 0.3141592654e1);
  printf("%f", z);
}