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Problems with struct returns from cc compiled code and gcc compiled
code under SunOS.

Header file:
/* smc_struct.h */

#include <stdio.h>
 
typedef struct
{
        int a;
        double b;
} smc_struct;


Code to be compiled with cc on a sun....


/* smc_cc.c */

#include "smc_struct.h"
 
smc_struct func(smc1)
smc_struct smc1;
{
  smc_struct smc2;
 
  smc2.a = 35; smc2.b = 39.425;
 
  printf("smc1.a = %d, smc1.b= %lf\n", smc1.a, smc1.b);
 
  printf("smc2.a = %d, smc2.b= %lf\n", smc2.a, smc2.b);
 
  return smc2;
}
 
Now, code to be compiled with gcc on a sun....


/* smc_gcc.c */

#include "smc_struct.h"
 
extern smc_struct func(smc_struct);
 
int main(void)
{
 
  smc_struct smc_main;
 
  smc_main.a = 11; smc_main.b = 88.793;
 
  smc_main = func(smc_main);
 
  printf("smc_main.a = %d, smc_main.b= %lf\n",
          smc_main.a, smc_main.b);
 
  return 0;
 
}
 
The gcc command line was tried with and without the -fpcc-struct-return
flag viz:

cc -c -g smc_cc.c 
gcc -c -g -fpcc-struct-return smc_gcc.c
gcc  -g -fpcc-struct-return  -o smc_test smc_cc.o smc_gcc.o

****BUT*** running the program gives:
smc1.a = 11, smc1.b= 88.793000
smc2.a = 35, smc2.b= 39.425000
%1   29303 Illegal instruction - core dumped smc_test 

It seemed as though this was fixed in 2.2.1 (unless I missed it), but
is now broken again. Any ideas? 

Running 2.2.2 on Sunos 4.1.1 / 4.1.2 on sparc.

(Please reply to derek@aivru.sheffield.ac.uk in preference to the return address
of this message as I don't pick up this mail too frequently, and I don't
read this news group regularly),

Many Thanks

Derek Jones
-- 
Derek Jones, System Manager, AI Vision Research Unit, University of Sheffield ,
Sheffield, S10 2TN, UK	Tel:(+44) (0)742 768555 X 6551 Fax:(+44) (0)742 766515
email: derek@aivru.sheffield.ac.uk   derek@ibmpcug.co.uk  
Compu$: 70374,1355