boot2

Playing with the boostrap
git clone https://git.ryansepassi.com/git/boot2.git
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003-fputs-stdout.c (380B)

      1 /* fputs(s, stdout) — canonical libc usage. fputs casts stream to long
      2  * (the fd) and forwards to write. stdout is a global (FILE*)1 that
      3  * boot2-syscall.c provides as a real symbol (mes's #define is undef'd
      4  * post-include). */
      5 typedef long FILE;
      6 extern FILE *stdout;
      7 extern int fputs (char const *s, FILE *stream);
      8 
      9 int
     10 main (void)
     11 {
     12   fputs ("hi\n", stdout);
     13   return 0;
     14 }