Hi everybody,
it's first time I write in this forum, after many years of other interests I'm coming back to coding under amigaos :-)

I'm just developing further an old amigaos program targeting it for OS4.1
I want use altivec extensions because I'd like to speedup thinghs and use program also for bench purposes..

Sadly I got a lot of problems compiling it with altivec extensions, so tryng to understand how stuff works I came back to a much simpler program like this:

/*
* FILE: vec_add.c
*/
#include <stdio.h>
#include <altivec.h>

/*
* declares input/output scalar varialbes
*/
int a[4] __attribute__((aligned(16))) = { 1, 3, 5, 7 };
int b[4] __attribute__((aligned(16))) = { 2, 4, 6, 8 };
int c[4] __attribute__((aligned(16)));

int main(int argc, char **argv)
{
/*
* declares vector variables which points to scalar arrays
*/
__vector signed int *va = (__vector signed int *) a;
__vector signed int *vb = (__vector signed int *) b;
__vector signed int *vc = (__vector signed int *) c;

/*
* adds four signed intergers at once
*/
*vc = vec_add(*va, *vb); // 1 + 2, 3 + 4, 5 + 6, 7 + 8

/*
* output results
*/
printf("c[0]=%d, c[1]=%d, c[2]=%d, c[3]=%d\n", c[0], c[1], c[2], c[3]);

return 0;
}

and tryed to compile with following line:

gcc -maltivec -mabi=altivec -o vec_add vec_add.c

..the epilog of the story is a grimreaper, why?