structured assembler (BASIC) [Really: C builtin functions?]

[VLD/VMB]

Actually, a hosted C implementation must supply a fair number
of library functions to qualify as a conforming X3J11 implementation.
This is not true of standalone C implementations, however.

These functions should not be thought of as "built-in";
indeed, X3J11 has decreed that there must be an actual
extern definition of each required function, even when the
usual usage would be implemented with preprocessor macros.
But the interface IS "standardized" now (or as soon as
the official X3J11 standard is approved).