struct _Edje_Message_String_Set
{
   int count;    //On 64 bit machine, this is 8 bytes
   char *str[];  //str has no "size" and is not counted in sizeof(_Edje_Message_String_Set)
};

typedef struct _Edje_Message_String_Set EdjeMessageStringSet;

##</code><code>##

use strict;
use warnings;

use Inline C => Config =>
 BUILD_NOISY => 1,
 USING => 'ParseRegExp',
;

use Inline C =><<'EOC';

typedef struct _foo
{
  int count;
} foo;

typedef struct _bar
{
   int count;
   char *str[];
} bar;

void sizes(void) {
  printf( "FOO: %d %d\n", sizeof(struct _foo),
                     sizeof(             foo) );
  printf( "BAR: %d %d\n", sizeof(struct _bar),
                     sizeof(             bar) );
  printf( "INTSIZE: %d\n", sizeof(int) );
}

EOC

sizes();

__END__

On 64 bit windows, outputs:

FOO: 4 4
BAR: 8 8
INTSIZE: 4

##</code><code>##

FOO: 4 4
BAR: 4 4
INTSIZE: 4