blob: e813db47437fc93b97c05b5ff93b19496207d43f (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
|
From: Jakub Jirutka <jakub@jirutka.cz>
Date: Wed, 23 May 2018 19:56:00 +0200
Subject: [PATCH] Ensure compatibility with other libcs
The musl libc does not provide __bswap_constant_32.
--- a/libocfs2/crc32table.h
+++ b/libocfs2/crc32table.h
@@ -6,11 +6,18 @@
*/
#include <inttypes.h>
#include <byteswap.h>
+
+#ifndef __bswap_constant_32
+#define __bswap_constant_32(x) \
+ ((((x) & 0xff000000u) >> 24) | (((x) & 0x00ff0000u) >> 8) \
+ | (((x) & 0x0000ff00u) << 8) | (((x) & 0x000000ffu) << 24))
+#endif
+
#if __BYTE_ORDER == __LITTLE_ENDIAN
# define tole(x) ((uint32_t)(x))
-# define tobe(x) ((uint32_t)__bswap_constant_32(x))
+# define tobe(x) ((uint32_t)__builtin_bswap32(x))
#elif __BYTE_ORDER == __BIG_ENDIAN
-# define tole(x) ((uint32_t)__bswap_constant_32(x))
+# define tole(x) ((uint32_t)__builtin_bswap32(x))
# define tobe(x) ((uint32_t)(x))
#else
# error Invalid byte order __BYTE_ORDER
|
