DragonFlyBSD

I can't compile the following C11 program:

// atomic_test.c
#include <stdio.h>
#include <complex.h>
#include <stdatomic.h>

int main(void) {
_Atomic long double _Complex x;
printf("(%Lf,%Lf)\n",creall(x), cimagl(x));
return 0;
}

cc -std=c11 atomic_test.c

/tmp//ccTm73vw.o:atomic_test.c:function main: error: undefined reference to '__atomic_load'
/tmp//ccTm73vw.o:atomic_test.c:function main: error: undefined reference to '__atomic_load'
collect2: error: ld returned 1 exit status

On my Linux system, I can link in -latomic:

cc -std=c11 atomic_test.c -latomic

But it seems this got removed from DragonFly's gcc8. I try to compile the Pony compiler ponyc,
which requires these atomic ops.