extern int x1f4_init_program
(void **x1f4_program, const char *program, unsigned flags,
const struct x1f4_c1_type *c1);
The x1f4_init_program function constructs the executable program
representation from the program textual representation in the
interpretation context described by flags and c1 and stores the
result at the address pointed to by x1f4_program.
See Imperative Language Interpreter Generation Flags.
See struct x1f4_c1_type.
The function returns 0 for success, one of the defined error codes for
failure.