Some systems, such as Android, don't have a define for __WORDSIZE, do it
in terms of __SIZEOF_LONG__, as done in perf since 2012:
http://git.kernel.org/torvalds/c/
3f34f6c0233ae055b5
For reference: https://gcc.gnu.org/onlinedocs/cpp/Common-Predefined-Macros.html
I build tested it here and Andrii did some Travis CI build tests too.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20200608161150.GA3073@kernel.org
#include <stdbool.h>
#include <stddef.h>
-#ifdef __GLIBC__
-#include <bits/wordsize.h>
-#else
-#include <bits/reg.h>
+#include <limits.h>
+#ifndef __WORDSIZE
+#define __WORDSIZE (__SIZEOF_LONG__ * 8)
#endif
static inline size_t hash_bits(size_t h, int bits)