Add MAP_ANON instead of MAP_ANONYMOUS for mac
@@ -1292,8 +1292,11 @@ JANET_CORE_FN(cfun_ffi_jitfn,
fn->size = 0;
#ifdef JANET_WINDOWS
void *ptr = VirtualAlloc(NULL, bytes.len, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);
-#else
+#elif defined(MAP_ANONYMOUS)
void *ptr = mmap(0, bytes.len, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+#else
+ /* macos doesn't have MAP_ANONYMOUS */
+ void *ptr = mmap(0, bytes.len, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON, -1, 0);
#endif
if (!ptr) {
janet_panic("failed to memory map writable memory");
