#include static Janet cfun_hello(int32_t argc, Janet *argv) { janet_fixarity(argc, 0); printf("hello world\n"); return janet_wrap_nil(); } static JanetReg cfuns[] = { {"hello", cfun_hello, "(hello)\n\nprints hello"}, {NULL, NULL, NULL} }; JANET_MODULE_ENTRY(JanetTable *env) { janet_cfuns(env, "set", cfuns); }