Use __typeof__(sizeof 0) trickery

We cannot pull stddef.h and since fortify already relies on GCC
features we can use the above typeof trick to get a usable size_t.

1 files changed, 2 insertions, 2 deletions

diff --git a/include/poll.h b/include/poll.h
index cbc78fd..83801bd 100644
--- a/include/poll.h
+++ b/include/poll.h
@@ -9,9 +9,9 @@ static inline __attribute__ ((always_inline))
 int
 __fortify_poll(struct pollfd *fds, nfds_t nfds, int timeout)
 {
+        __typeof__(sizeof 0) bos = __builtin_object_size(fds, 0);
 
-        if (__builtin_object_size(fds, 0) != -1 &&
-            nfds > __builtin_object_size(fds, 0) / sizeof(struct pollfd))
+        if (bos != -1 && nfds > bos / sizeof(struct pollfd))
                 __builtin_trap();
         return poll(fds, nfds, timeout);
 }