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 | /* ---- Endian Detection ------------------------------------ */
|
---|
79 |
|
---|
80 | #if (defined __digital__ && defined __unix__)
|
---|
81 | # include <sex.h>
|
---|
82 | # define __BIG_ENDIAN__ (BYTE_ORDER == BIG_ENDIAN)
|
---|
83 | # define __BYTE_ORDER BYTE_ORDER
|
---|
84 | #elif !defined __APPLE__
|
---|
85 | # include <byteswap.h>
|
---|
86 | # include <endian.h>
|
---|
87 | #endif
|
---|
88 |
|
---|
89 | #ifdef __BIG_ENDIAN__
|
---|
90 | # define BB_BIG_ENDIAN 1
|
---|
91 | # define BB_LITTLE_ENDIAN 0
|
---|
92 | #elif __BYTE_ORDER == __BIG_ENDIAN
|
---|
93 | # define BB_BIG_ENDIAN 1
|
---|
94 | # define BB_LITTLE_ENDIAN 0
|
---|
95 | #else
|
---|
96 | # define BB_BIG_ENDIAN 0
|
---|
97 | # define BB_LITTLE_ENDIAN 1
|
---|
98 | #endif
|
---|
99 |
|
---|
100 | #if BB_BIG_ENDIAN
|
---|
101 | #define SWAP_BE16(x) (x)
|
---|
102 | #define SWAP_BE32(x) (x)
|
---|
103 | #define SWAP_BE64(x) (x)
|
---|
104 | #define SWAP_LE16(x) bswap_16(x)
|
---|
105 | #define SWAP_LE32(x) bswap_32(x)
|
---|
106 | #define SWAP_LE64(x) bswap_64(x)
|
---|
107 | #else
|
---|
108 | #define SWAP_BE16(x) bswap_16(x)
|
---|
109 | #define SWAP_BE32(x) bswap_32(x)
|
---|
110 | #define SWAP_BE64(x) bswap_64(x)
|
---|
111 | #define SWAP_LE16(x) (x)
|
---|
112 | #define SWAP_LE32(x) (x)
|
---|
113 | #define SWAP_LE64(x) (x)
|
---|
114 | #endif
|
---|
115 |
|
---|
116 | /* ---- Networking ------------------------------------------ */
|
---|
117 | #ifndef __APPLE__
|
---|
118 | # include <arpa/inet.h>
|
---|
119 | #else
|
---|
120 | # include <netinet/in.h>
|
---|
121 | #endif
|
---|
122 |
|
---|
123 | #ifndef __socklen_t_defined
|
---|
124 | typedef int socklen_t;
|
---|
125 | #endif
|
---|
126 |
|
---|
127 | /* ---- Compiler dependent settings ------------------------- */
|
---|
128 | #ifndef __GNUC__
|
---|
129 | #if defined __INTEL_COMPILER
|
---|
130 | __extension__ typedef __signed__ long long __s64;
|
---|
131 | __extension__ typedef unsigned long long __u64;
|
---|
132 | #endif /* __INTEL_COMPILER */
|
---|
133 | #endif /* ifndef __GNUC__ */
|
---|
134 |
|
---|
135 | #if (defined __digital__ && defined __unix__)
|
---|
136 | # undef HAVE_MNTENT_H
|
---|
137 | #else
|
---|
138 | # define HAVE_MNTENT_H 1
|
---|
139 | #endif /* ___digital__ && __unix__ */
|
---|
140 |
|
---|
141 | /*----- Kernel versioning ------------------------------------*/
|
---|
142 | #define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
|
---|
143 |
|
---|
144 | /* ---- miscellaneous --------------------------------------- */
|
---|
145 |
|
---|
146 | #if defined(__GNU_LIBRARY__) && __GNU_LIBRARY__ < 5 && \
|
---|
147 | !defined(__dietlibc__) && \
|
---|
148 | !defined(_NEWLIB_VERSION) && \
|
---|
149 | !(defined __digital__ && defined __unix__)
|
---|
150 | # error "Sorry, this libc version is not supported :("
|
---|
151 | #endif
|
---|
152 |
|
---|
153 | // Don't perpetuate e2fsck crap into the headers. Clean up e2fsck instead.
|
---|
154 |
|
---|
155 | #if defined __GLIBC__ || defined __UCLIBC__ \
|
---|
156 | || defined __dietlibc__ || defined _NEWLIB_VERSION
|
---|
157 | #include <features.h>
|
---|
158 | #define HAVE_FEATURES_H
|
---|
159 | #include <stdint.h>
|
---|
160 | #define HAVE_STDINT_H
|
---|
161 | #else
|
---|
162 | /* Largest integral types. */
|
---|
163 | #if __BIG_ENDIAN__
|
---|
164 | typedef long int intmax_t;
|
---|
165 | typedef unsigned long int uintmax_t;
|
---|
166 | #else
|
---|
167 | __extension__
|
---|
168 | typedef long long int intmax_t;
|
---|
169 | __extension__
|
---|
170 | typedef unsigned long long int uintmax_t;
|
---|
171 | #endif
|
---|
172 | #endif
|
---|
173 |
|
---|
174 | /* uclibc does not implement daemon for no-mmu systems.
|
---|
175 | * For 0.9.29 and svn, __ARCH_USE_MMU__ indicates no-mmu reliably.
|
---|
176 | * For earlier versions there is no reliable way to check if we are building
|
---|
177 | * for a mmu-less system; the user should pass EXTRA_CFLAGS="-DBB_NOMMU"
|
---|
178 | * on his own.
|
---|
179 | */
|
---|
180 | #if defined __UCLIBC__ && __UCLIBC_MAJOR__ >= 0 && __UCLIBC_MINOR__ >= 9 && \
|
---|
181 | __UCLIBC_SUBLEVEL__ > 28 && !defined __ARCH_USE_MMU__
|
---|
182 | #define BB_NOMMU
|
---|
183 | #endif
|
---|
184 |
|
---|
185 | /* Platforms that haven't got dprintf need to implement fdprintf() in
|
---|
186 | * libbb. This would require a platform.c. It's not going to be cleaned
|
---|
187 | * out of the tree, so stop saying it should be. */
|
---|
188 | #define fdprintf dprintf
|
---|
189 |
|
---|
190 | /* THIS SHOULD BE CLEANED OUT OF THE TREE ENTIRELY */
|
---|
191 | /* FIXME: fix tar.c! */
|
---|
192 | #ifndef FNM_LEADING_DIR
|
---|
193 | #define FNM_LEADING_DIR 0
|
---|
194 | #endif
|
---|
195 |
|
---|
196 | #if (defined __digital__ && defined __unix__)
|
---|
197 | #include <standards.h>
|
---|
198 | #define HAVE_STANDARDS_H
|
---|
199 | #include <inttypes.h>
|
---|
200 | #define HAVE_INTTYPES_H
|
---|
201 | #define PRIu32 "u"
|
---|
202 |
|
---|
203 | /* use legacy setpgrp(pidt_,pid_t) for now. move to platform.c */
|
---|
204 | #define bb_setpgrp do{pid_t __me = getpid();setpgrp(__me,__me);}while(0)
|
---|
205 |
|
---|
206 | #if !defined ADJ_OFFSET_SINGLESHOT && defined MOD_CLKA && defined MOD_OFFSET
|
---|
207 | #define ADJ_OFFSET_SINGLESHOT (MOD_CLKA | MOD_OFFSET)
|
---|
208 | #endif
|
---|
209 | #if !defined ADJ_FREQUENCY && defined MOD_FREQUENCY
|
---|
210 | #define ADJ_FREQUENCY MOD_FREQUENCY
|
---|
211 | #endif
|
---|
212 | #if !defined ADJ_TIMECONST && defined MOD_TIMECONST
|
---|
213 | #define ADJ_TIMECONST MOD_TIMECONST
|
---|
214 | #endif
|
---|
215 | #if !defined ADJ_TICK && defined MOD_CLKB
|
---|
216 | #define ADJ_TICK MOD_CLKB
|
---|
217 | #endif
|
---|
218 |
|
---|
219 | #else
|
---|
220 | #define bb_setpgrp setpgrp()
|
---|
221 | #endif
|
---|
222 |
|
---|
223 | #if defined(__linux__)
|
---|
224 | #include <sys/mount.h>
|
---|
225 | #if !defined(BLKSSZGET)
|
---|
226 | #define BLKSSZGET _IO(0x12, 104)
|
---|
227 | #endif
|
---|
228 | #if !defined(BLKGETSIZE64)
|
---|
229 | #define BLKGETSIZE64 _IOR(0x12,114,size_t)
|
---|
230 | #endif
|
---|
231 | #endif
|
---|
232 |
|
---|
233 | #endif /* platform.h */
|
---|