blob: d4edfb6d04c45452f3b98c749ad9a0763c393764 (
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
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
|
// The tendency of gcc to produce stupid warnings continues with
// warn_unsed_result, which warns about things like ignoring the return code
// of nice(2) (which is completely useless since -1 is a legitimate return
// value on success and even the man page tells you to use errno instead).
// This makes it stop.
#undef _FORTIFY_SOURCE
// Humor glibc to get dprintf, then #define it to something more portable.
#define _GNU_SOURCE
#include <stdio.h>
#define fdprintf(...) dprintf(__VA_ARGS__)
#ifdef __GNUC__
#define noreturn __attribute__((noreturn))
#else
#define noreturn
#endif
#ifndef __APPLE__
#include <byteswap.h>
#include <endian.h>
#if __BYTE_ORDER == __BIG_ENDIAN
#define IS_BIG_ENDIAN 1
#else
#define IS_BIG_ENDIAN 0
#endif
#else
#ifdef __BIG_ENDIAN__
#define IS_BIG_ENDIAN 1
#else
#define IS_BIG_ENDIAN 0
#endif
#endif
#if IS_BIG_ENDIAN
#define IS_LITTLE_ENDIAN 0
#define SWAP_BE16(x) (x)
#define SWAP_BE32(x) (x)
#define SWAP_BE64(x) (x)
#define SWAP_LE16(x) bswap_16(x)
#define SWAP_LE32(x) bswap_32(x)
#define SWAP_LE64(x) bswap_64(x)
#else
#define IS_LITTLE_ENDIAN 1
#define SWAP_BE16(x) bswap_16(x)
#define SWAP_BE32(x) bswap_32(x)
#define SWAP_BE64(x) bswap_64(x)
#define SWAP_LE16(x) (x)
#define SWAP_LE32(x) (x)
#define SWAP_LE64(x) (x)
#endif
// Some versions of gcc produce spurious "may be uninitialized" warnings in
// cases where it provably can't happen. Unfortunately, although this warning
// is calculated and produced separately from the "is definitely used
// uninitialized" warnings, there's no way to turn off the broken spurious "may
// be" warnings without also turning off the non-broken "is" warnings.
#if CFG_TOYBOX_DEBUG
#define GCC_BUG =0
#else
#define GCC_BUG
#endif
|
