[egcs 1.1.2 mips] union bug ?

[Gilles Zunino]

	Hi,

	Let's consider the following code :

%--------------------------------------------------
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/ipc.h>
#include <sys/sem.h>
#include <errno.h>
#include <stdio.h>


int CreateSemaphore(void)
{
   int    sid;
   key_t  cle = (getpid() / 100) * 100;
   union  semun theValue;
   int v;

   if ((sid = semget(cle,1,IPC_CREAT | 0660)) == -1)
      {
         perror("CreateSemaphore (semget) ");
         exit(errno);
      }
   
   theValue.val = 1;
   if (semctl(sid,0,SETVAL,theValue) == -1)      /* <===== here */
      {
         perror("CreateSemaphore (semctl) ");
         exit(errno);
      }


    if ((v = semctl(sid,0,GETVAL)) == -1)
      {
         perror("CreateSemaphore (semctl) ");
         exit(errno);
      }

     printf("Semaphore has value : %d \n",v);

   return sid;
}

int main(void)
{
   
   CreateSemaphore();

   return 0;
}
%--------------------------------------------------

When compiled with SGI's cc, this code correctly set the 
semaphore value to 1.

When compiled with egcs 1.1.2 (mips-sgi-irix6.5) the semaphore
value is left to 0. As far as I understand, the variable "TheValule" :

	union  semun theValue;

is incorrectly passed to the function semctl().

Here is how gcc was invoked and the gcc version

gcc file.c -g -o file

{dunan ~/} gcc -v
Reading specs from
/usr/local/lib/gcc-lib/mips-sgi-irix6.5/egcs-2.91.66/specs
gcc version egcs-2.91.66 19990314 (egcs-1.1.2 release)

Did I missed something ?

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Gilles Zunino - (Gilles.Zunino@hei.fupl.asso.fr)   (A 506)  7636

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