Relax our checks for memchr on C11 and above2.2

Since C11:

> This function behaves as if it reads the bytes sequentially and stops as soon
as a matching bytes is found: if the array pointed to by ptr is smaller than
count, but the match is found within the array, the behavior is well-defined.

Reported-by: q66

1 files changed, 3 insertions, 1 deletions

diff --git a/include/string.h b/include/string.h
index 24c1501..db2e6c3 100644
--- a/include/string.h
+++ b/include/string.h
@@ -123,10 +123,12 @@ _FORTIFY_FN(memchr) void *memchr(const void * _FORTIFY_POS0 __d, int __c, size_t
         if (!__d)
                 __builtin_trap();
 
+#if __STDC_VERSION__ < 201112L
         __fh_size_t __b = __fh_bos(__d, 0);
-
         if (__n > __b)
                 __builtin_trap();
+#endif
+
         return __builtin_memchr(__d, __c, __n);
 #endif
 }