XXX: All this is done backwards, and is a mess. Really the _foo.c files should
include the _foo function definition, not the foo.c files, like everywhere
else.
of these functions. This is somewhat of a kludge, but there is not
much else we can do for this case.
Because of how the callable versions are created, by CPP trickery
and inclusion of another .c file, we cannot allow the included .c
file to pull in "namespace.h", since it undoes the CPP trickery we
have performed. Introduce a CPP macro that prevents the included .c
file from pulling in "namespace.h".
