Re: [Tinycc-devel] Linux off_t casting?

[Ivan Popov]

On Thu, Jul 14, 2005 at 09:49:00PM -0700, address@hidden wrote:
> Hmm. Am I doing something wrong here?
> 
> The example code below compiles with no warnings using
> "gcc -ansi -pedantic -W -Wextra".
> 
> -Charles
> 
> address@hidden tcc-apps]$ tcc -v
> tcc version 0.9.23
> 
> address@hidden tcc-apps]$ tcc off_t.c
> off_t.c:10: cannot cast 'int' to 'struct <anonymous>'

My try:

$ cat aa.c
#define _LARGEFILE_SOURCE
#define _FILE_OFFSET_BITS 64

#include <sys/types.h>
#include <unistd.h>

int main(void)
{
  off_t j;
  j = 0;     /* cast required */
  j++;       /* does not work */
  j = j + 4; /* casts required */
  return 0;
}
$ tcc -o aa aa.c
$ tcc
tcc version 0.9.23 - Tiny C Compiler - Copyright (C) 2001-2005 Fabrice Bellard
 ...

My environment: Linux, Konvalo.org, glibc 2.3.2, tcc patched with

patch.felix.nawothnig  (from tcc-list)
--- tcc.c       17 Apr 2005 13:15:54 -0000      1.170
+++ tcc.c       20 Jun 2005 12:40:18 -0000
@@ -5634,7 +5634,7 @@
         /* XXX: currently, some unsigned operations are explicit, so
            we modify them here */
         if (t & VT_UNSIGNED) {
-            if (op == TOK_SAR)
+            if (op == TOK_SAR && (t1 & VT_UNSIGNED))
                 op = TOK_SHR;
             else if (op == '/')
                 op = TOK_UDIV;

which is most probably irrelevant. I'd rather guess the difference is due to
different includes.

Regards,
--
Ivan