1 /* vi: set sw=4 ts=4: */
3 Copyright 2006, Bernhard Fischer
5 Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
10 /* Convenience macros to test the version of gcc. */
12 #if defined __GNUC__ && defined __GNUC_MINOR__
13 # define __GNUC_PREREQ(maj, min) \
14 ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
16 # define __GNUC_PREREQ(maj, min) 0
19 /* __restrict is known in EGCS 1.2 and above. */
20 #if !__GNUC_PREREQ (2,92)
22 # define __restrict /* Ignore */
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. */
30 #if !__GNUC_PREREQ (2,7)
31 # ifndef __attribute__
32 # define __attribute__(x)
37 #if defined(__STDC_VERSION__) && __STDC_VERSION__ > 199901L
40 # if __GNUC_PREREQ (2,7)
41 # define inline __inline__
48 # define __const const
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
58 # define ATTRIBUTE_ALWAYS_INLINE inline
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__))
66 # define ATTRIBUTE_EXTERNALLY_VISIBLE
67 # endif /* GNUC >= 4.1 */
69 /* We use __extension__ in some places to suppress -pedantic warnings
70 about GCC extensions. This feature didn't work properly before
72 #if !__GNUC_PREREQ (2,8)
73 # ifndef __extension__
74 # define __extension__
78 /* gcc-2.95 had no va_copy but only __va_copy. */
79 #if !__GNUC_PREREQ (3,0)
81 # if !defined va_copy && defined __va_copy
82 # define va_copy(d,s) __va_copy((d),(s))
86 /* ---- Endian Detection ------------------------------------ */
88 #if (defined __digital__ && defined __unix__)
90 # define __BIG_ENDIAN__ (BYTE_ORDER == BIG_ENDIAN)
91 # define __BYTE_ORDER BYTE_ORDER
92 #elif !defined __APPLE__
93 # include <byteswap.h>
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
104 # define BB_BIG_ENDIAN 0
105 # define BB_LITTLE_ENDIAN 1
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)
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)
124 /* ---- Networking ------------------------------------------ */
126 # include <arpa/inet.h>
128 # include <netinet/in.h>
131 #ifndef __socklen_t_defined
132 typedef int socklen_t;
135 /* ---- Compiler dependent settings ------------------------- */
136 #if (defined __digital__ && defined __unix__)
137 # undef HAVE_MNTENT_H
139 # define HAVE_MNTENT_H 1
140 #endif /* ___digital__ && __unix__ */
142 /* linux/loop.h relies on __u64. Make sure we have that as a proper type
143 * until userspace is widely fixed. */
145 #if defined __INTEL_COMPILER
146 __extension__ typedef __signed__ long long __s64;
147 __extension__ typedef unsigned long long __u64;
148 #endif /* __INTEL_COMPILER */
149 #endif /* ifndef __GNUC__ */
151 /*----- Kernel versioning ------------------------------------*/
152 #define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
154 /* ---- miscellaneous --------------------------------------- */
156 #if defined(__GNU_LIBRARY__) && __GNU_LIBRARY__ < 5 && \
157 !defined(__dietlibc__) && \
158 !defined(_NEWLIB_VERSION) && \
159 !(defined __digital__ && defined __unix__)
160 # error "Sorry, this libc version is not supported :("
163 // Don't perpetuate e2fsck crap into the headers. Clean up e2fsck instead.
165 #if defined __GLIBC__ || defined __UCLIBC__ \
166 || defined __dietlibc__ || defined _NEWLIB_VERSION
167 #include <features.h>
168 #define HAVE_FEATURES_H
170 #define HAVE_STDINT_H
172 /* Largest integral types. */
174 typedef long int intmax_t;
175 typedef unsigned long int uintmax_t;
178 typedef long long int intmax_t;
180 typedef unsigned long long int uintmax_t;
184 /* Size-saving "small" ints (arch-dependent) */
185 #if defined(i386) || defined(__x86_64__) || defined(__mips__) || defined(__cris__)
186 /* add other arches which benefit from this... */
187 typedef signed char smallint;
188 typedef unsigned char smalluint;
190 /* for arches where byte accesses generate larger code: */
191 typedef int smallint;
192 typedef unsigned smalluint;
195 /* ISO C Standard: 7.16 Boolean type and values <stdbool.h> */
196 #if (defined __digital__ && defined __unix__)
197 /* old system without (proper) C99 support */
198 #define bool smalluint
200 /* modern system, so use it */
205 /* uclibc does not implement daemon() for no-mmu systems.
206 * For 0.9.29 and svn, __ARCH_USE_MMU__ indicates no-mmu reliably.
207 * For earlier versions there is no reliable way to check if we are building
208 * for a mmu-less system; the user should pass EXTRA_CFLAGS="-DBB_NOMMU"
211 #if defined __UCLIBC__ && __UCLIBC_MAJOR__ >= 0 && __UCLIBC_MINOR__ >= 9 && \
212 __UCLIBC_SUBLEVEL__ > 28 && !defined __ARCH_USE_MMU__
216 /* Platforms that haven't got dprintf need to implement fdprintf() in
217 * libbb. This would require a platform.c. It's not going to be cleaned
218 * out of the tree, so stop saying it should be. */
219 #if !defined(__dietlibc__)
220 /* Needed for: glibc */
221 /* Not needed for: dietlibc */
222 /* Others: ?? (add as needed) */
223 #define fdprintf dprintf
226 #if defined(__dietlibc__)
227 static ATTRIBUTE_ALWAYS_INLINE char* strchrnul(const char *s, char c) {
228 while (*s && *s != c) ++s;
233 /* Don't use lchown with glibc older than 2.1.x ... uC-libc lacks it */
234 #if (defined __GLIBC__ && __GLIBC__ <= 2 && __GLIBC_MINOR__ < 1) || \
236 # define lchown chown
239 /* THIS SHOULD BE CLEANED OUT OF THE TREE ENTIRELY */
240 /* FIXME: fix tar.c! */
241 #ifndef FNM_LEADING_DIR
242 #define FNM_LEADING_DIR 0
245 #if (defined __digital__ && defined __unix__)
246 #include <standards.h>
247 #define HAVE_STANDARDS_H
248 #include <inttypes.h>
249 #define HAVE_INTTYPES_H
252 /* use legacy setpgrp(pidt_,pid_t) for now. move to platform.c */
253 #define bb_setpgrp do { pid_t __me = getpid(); setpgrp(__me,__me); } while (0)
255 #if !defined ADJ_OFFSET_SINGLESHOT && defined MOD_CLKA && defined MOD_OFFSET
256 #define ADJ_OFFSET_SINGLESHOT (MOD_CLKA | MOD_OFFSET)
258 #if !defined ADJ_FREQUENCY && defined MOD_FREQUENCY
259 #define ADJ_FREQUENCY MOD_FREQUENCY
261 #if !defined ADJ_TIMECONST && defined MOD_TIMECONST
262 #define ADJ_TIMECONST MOD_TIMECONST
264 #if !defined ADJ_TICK && defined MOD_CLKB
265 #define ADJ_TICK MOD_CLKB
269 #define bb_setpgrp setpgrp()
272 #if defined(__linux__)
273 #include <sys/mount.h>
274 // Make sure we have all the new mount flags we actually try to use.
276 #define MS_BIND (1<<12)
279 #define MS_MOVE (1<<13)
282 #define MS_RECURSIVE (1<<14)
285 #define MS_SILENT (1<<15)
288 // The shared subtree stuff, which went in around 2.6.15
289 #ifndef MS_UNBINDABLE
290 #define MS_UNBINDABLE (1<<17)
293 #define MS_PRIVATE (1<<18)
296 #define MS_SLAVE (1<<19)
299 #define MS_SHARED (1<<20)
303 #if !defined(BLKSSZGET)
304 #define BLKSSZGET _IO(0x12, 104)
306 #if !defined(BLKGETSIZE64)
307 #define BLKGETSIZE64 _IOR(0x12,114,size_t)
311 #endif /* platform.h */