__builtin_clrsbl undefined

__builtin_clrsb and __builtin_clrsbll exist, but __builtin_clrsbl seems to be missing.  Quick test:

#include <stdlib.h>
#include <stdio.h>

int main (void) {
  printf("int: %d\n", __builtin_clrsb(-1));
  printf("long: %d\n", __builtin_clrsbl(-1));
  printf("long long: %d\n", __builtin_clrsbll(-1));

  return EXIT_SUCCESS;
}

When attempting to compile:

nemequ@peltast:~/t$ icc -o clrsb clrsb.c
clrsb.c(6): warning #266: function "__builtin_clrsbl" declared implicitly
    printf("long: %d\n", __builtin_clrsbl(-1));
                         ^

/tmp/icc9KCY5p.o: In function `main':
clrsb.c:(.text+0x43): undefined reference to `__builtin_clrsbl'
nemequ@peltast:~/t$ icc --version
icc (ICC) 17.0.2 20170213
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