gcc-3.4.1-9, ia64, dist-fc3 buildroot.

bash-3.00# cat dbl.c
#include <stdio.h>
#include <limits.h>
int main(int argc, char **argv)
{
   double d = -12.345;
   long l = (d > LONG_MAX) ? (unsigned long) d : (long) d;
   printf("%ld\n", l);
   return 0;
}
bash-3.00# gcc -Wall dbl.c
bash-3.00# ./a.out
-9223372036854775808
bash-3.00# gcc -O2 -Wall dbl.c
bash-3.00# ./a.out
0

Yes the program is weird and stupid, but it seems to have well-defined
behaviour by C99, AFAICT.

if the line is changed to, e.g.:

   long l = (d > LONG_MAX) ? (unsigned long) (puts(""), d) : (long) d;

it prints -12, also.