structure fixes, xmake, gitignore

byterun/include/runtime.h

@@ -0,0 +1,29 @@
+#pragma once
+
+#include <assert.h>
+#include <ctype.h>
+#include <errno.h>
+#include <limits.h>
+#include <regex.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/mman.h>
+#include <time.h>
+
+#define WORD_SIZE (CHAR_BIT * sizeof(int))
+
+inline void vfailure(char *s, va_list args) {
+  fprintf(stderr, "*** FAILURE: ");
+  vfprintf(stderr, s,
+           args); // vprintf (char *, va_list) <-> printf (char *, ...)
+  exit(255);
+}
+
+inline void failure(char *s, ...) {
+  va_list args;
+
+  va_start(args, s);
+  vfailure(s, args);
+}