[Tinycc-devel] Today's bug...

[Rob Landley]

#include <stdio.h>
#include <sys/stat.h>

int main(int argc, char *argv[])
{
   struct stat stat;
   stat.st_dev = 42;

  printf("%ld\n", stat.st_dev);
  return 0;
}

Works find with gcc, with tcc it goes:
test.c:8: cannot cast 'int' to 'struct <anonymous>'

Yeah, slightly dodgy, but bear with me.

The _reason_ is that the glibc's /usr/include/bits/types.h has:
> /* quad_t is also 64 bits.  */
> #if __WORDSIZE == 64
> typedef long int __quad_t;
> typedef unsigned long int __u_quad_t;
> #elif defined __GLIBC_HAVE_LONG_LONG
> __extension__ typedef long long int __quad_t;
> __extension__ typedef unsigned long long int __u_quad_t;
> #else
> typedef struct
> {
>   long __val[2];
> } __quad_t;

And since __GLIBC_HAVE_LONG_LONG isn't defined, it falls through to the struct 
definition.  That definition comes from /usr/include/features.h, and to make 
a long story short we get it by #defining __STDC_VERSION__ 199901L

Since we _do_ support c99, this shouldn't break anything.  I think...

Rob
-- 
"One of my most productive days was throwing away 1000 lines of code."
  - Ken Thompson.