source: MondoRescue/branches/stable/mindi-busybox/include/platform.h @ 902

Last change on this file since 902 was 902, checked in by Bruno Cornec, 13 years ago

mindi-busybox now uses busybox 1.2.2 (Thanks Rob for that last update and good lucck for your future projects).

File size: 6.3 KB
Line 
1/* vi: set sw=4 ts=4: */
2/*
3   Copyright 2006, Bernhard Fischer
4
5   Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
6*/
7#ifndef __PLATFORM_H
8#define __PLATFORM_H    1
9
10/* Convenience macros to test the version of gcc. */
11#undef __GNUC_PREREQ
12#if defined __GNUC__ && defined __GNUC_MINOR__
13# define __GNUC_PREREQ(maj, min) \
14            ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
15#else
16# define __GNUC_PREREQ(maj, min) 0
17#endif
18
19/* __restrict is known in EGCS 1.2 and above. */
20#if !__GNUC_PREREQ (2,92)
21# ifndef __restrict
22#  define __restrict     /* Ignore */
23# endif
24#endif
25
26/* Define macros for some gcc attributes.  This permits us to use the
27   macros freely, and know that they will come into play for the
28   version of gcc in which they are supported.  */
29
30#if !__GNUC_PREREQ (2,7)
31# ifndef __attribute__
32#  define __attribute__(x)
33# endif
34#endif
35
36#undef inline
37#if __STDC_VERSION__ > 199901L
38/* it's a keyword */
39#else
40# if __GNUC_PREREQ (2,7)
41#  define inline __inline__
42# else
43#  define inline
44# endif
45#endif
46
47#ifndef __const
48# define __const const
49#endif
50
51# define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
52# define ATTRIBUTE_NORETURN __attribute__ ((__noreturn__))
53# define ATTRIBUTE_PACKED __attribute__ ((__packed__))
54# define ATTRIBUTE_ALIGNED(m) __attribute__ ((__aligned__(m)))
55# if __GNUC_PREREQ (3,0)
56#  define ATTRIBUTE_ALWAYS_INLINE __attribute__ ((always_inline)) inline
57# else
58#  define ATTRIBUTE_ALWAYS_INLINE inline
59# endif
60
61/* -fwhole-program makes all symbols local. The attribute externally_visible
62   forces a symbol global.  */
63# if __GNUC_PREREQ (4,1)
64#  define ATTRIBUTE_EXTERNALLY_VISIBLE __attribute__ ((__externally_visible__))
65# else
66#  define ATTRIBUTE_EXTERNALLY_VISIBLE
67# endif /* GNUC >= 4.1 */
68
69/* We use __extension__ in some places to suppress -pedantic warnings
70   about GCC extensions.  This feature didn't work properly before
71   gcc 2.8.  */
72#if !__GNUC_PREREQ (2,8)
73# ifndef __extension__
74#  define __extension__
75# endif
76#endif
77
78/* gcc-2.95 had no va_copy but only __va_copy. */
79#if !__GNUC_PREREQ (3,0)
80# include <stdarg.h>
81# if !defined va_copy && defined __va_copy
82#  define va_copy(d,s) __va_copy((d),(s))
83# endif
84#endif
85
86/* ---- Endian Detection ------------------------------------ */
87
88#if (defined __digital__ && defined __unix__)
89# include <sex.h>
90# define __BIG_ENDIAN__ (BYTE_ORDER == BIG_ENDIAN)
91# define __BYTE_ORDER BYTE_ORDER
92#elif !defined __APPLE__
93# include <byteswap.h>
94# include <endian.h>
95#endif
96
97#ifdef __BIG_ENDIAN__
98# define BB_BIG_ENDIAN 1
99# define BB_LITTLE_ENDIAN 0
100#elif __BYTE_ORDER == __BIG_ENDIAN
101# define BB_BIG_ENDIAN 1
102# define BB_LITTLE_ENDIAN 0
103#else
104# define BB_BIG_ENDIAN 0
105# define BB_LITTLE_ENDIAN 1
106#endif
107
108#if BB_BIG_ENDIAN
109#define SWAP_BE16(x) (x)
110#define SWAP_BE32(x) (x)
111#define SWAP_BE64(x) (x)
112#define SWAP_LE16(x) bswap_16(x)
113#define SWAP_LE32(x) bswap_32(x)
114#define SWAP_LE64(x) bswap_64(x)
115#else
116#define SWAP_BE16(x) bswap_16(x)
117#define SWAP_BE32(x) bswap_32(x)
118#define SWAP_BE64(x) bswap_64(x)
119#define SWAP_LE16(x) (x)
120#define SWAP_LE32(x) (x)
121#define SWAP_LE64(x) (x)
122#endif
123
124/* ---- Networking ------------------------------------------ */
125#ifndef __APPLE__
126# include <arpa/inet.h>
127#else
128# include <netinet/in.h>
129#endif
130
131#ifndef __socklen_t_defined
132typedef int socklen_t;
133#endif
134
135/* ---- Compiler dependent settings ------------------------- */
136#ifndef __GNUC__
137#if defined __INTEL_COMPILER
138__extension__ typedef __signed__ long long __s64;
139__extension__ typedef unsigned long long __u64;
140#endif /* __INTEL_COMPILER */
141#endif /* ifndef __GNUC__ */
142
143#if (defined __digital__ && defined __unix__)
144# undef HAVE_MNTENT_H
145#else
146# define HAVE_MNTENT_H 1
147#endif /* ___digital__ && __unix__ */
148
149/*----- Kernel versioning ------------------------------------*/
150#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
151
152/* ---- miscellaneous --------------------------------------- */
153
154#if defined(__GNU_LIBRARY__) && __GNU_LIBRARY__ < 5 && \
155    !defined(__dietlibc__) && \
156    !defined(_NEWLIB_VERSION) && \
157    !(defined __digital__ && defined __unix__)
158# error "Sorry, this libc version is not supported :("
159#endif
160
161// Don't perpetuate e2fsck crap into the headers.  Clean up e2fsck instead.
162
163#if defined __GLIBC__ || defined __UCLIBC__ \
164    || defined __dietlibc__ || defined _NEWLIB_VERSION
165#include <features.h>
166#define HAVE_FEATURES_H
167#include <stdint.h>
168#define HAVE_STDINT_H
169#else
170/* Largest integral types.  */
171#if __BIG_ENDIAN__
172typedef long int                intmax_t;
173typedef unsigned long int       uintmax_t;
174#else
175__extension__
176typedef long long int           intmax_t;
177__extension__
178typedef unsigned long long int  uintmax_t;
179#endif
180#endif
181
182/* uclibc does not implement daemon for no-mmu systems.
183 * For 0.9.29 and svn, __ARCH_USE_MMU__ indicates no-mmu reliably.
184 * For earlier versions there is no reliable way to check if we are building
185 * for a mmu-less system; the user should pass EXTRA_CFLAGS="-DBB_NOMMU"
186 * on his own.
187 */
188#if defined __UCLIBC__ && __UCLIBC_MAJOR__ >= 0 && __UCLIBC_MINOR__ >= 9 && \
189    __UCLIBC_SUBLEVEL__ > 28 && !defined __ARCH_USE_MMU__
190#define BB_NOMMU
191#endif
192
193/* Platforms that haven't got dprintf need to implement fdprintf() in
194 * libbb.  This would require a platform.c.  It's not going to be cleaned
195 * out of the tree, so stop saying it should be. */
196#define fdprintf dprintf
197
198/* THIS SHOULD BE CLEANED OUT OF THE TREE ENTIRELY */
199/* FIXME: fix tar.c! */
200#ifndef FNM_LEADING_DIR
201#define FNM_LEADING_DIR 0
202#endif
203
204#if (defined __digital__ && defined __unix__)
205#include <standards.h>
206#define HAVE_STANDARDS_H
207#include <inttypes.h>
208#define HAVE_INTTYPES_H
209#define PRIu32 "u"
210
211/* use legacy setpgrp(pidt_,pid_t) for now.  move to platform.c */
212#define bb_setpgrp do{pid_t __me = getpid();setpgrp(__me,__me);}while(0)
213
214#if !defined ADJ_OFFSET_SINGLESHOT && defined MOD_CLKA && defined MOD_OFFSET
215#define ADJ_OFFSET_SINGLESHOT (MOD_CLKA | MOD_OFFSET)
216#endif
217#if !defined ADJ_FREQUENCY && defined MOD_FREQUENCY
218#define ADJ_FREQUENCY MOD_FREQUENCY
219#endif
220#if !defined ADJ_TIMECONST && defined MOD_TIMECONST
221#define ADJ_TIMECONST MOD_TIMECONST
222#endif
223#if !defined ADJ_TICK && defined MOD_CLKB
224#define ADJ_TICK MOD_CLKB
225#endif
226
227#else
228#define bb_setpgrp setpgrp()
229#endif
230
231#if defined(__linux__)
232#include <sys/mount.h>
233#if !defined(BLKSSZGET)
234#define BLKSSZGET _IO(0x12, 104)
235#endif
236#if !defined(BLKGETSIZE64)
237#define BLKGETSIZE64 _IOR(0x12,114,size_t)
238#endif
239#endif
240
241#endif  /* platform.h   */
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