Annotation of /trunk/mkinitrd-magellan/busybox/include/platform.h
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Revision 532 -
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Sat Sep 1 22:45:15 2007 UTC (16 years, 9 months ago) by niro
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Sat Sep 1 22:45:15 2007 UTC (16 years, 9 months ago) by niro
File MIME type: text/plain
File size: 7709 byte(s)
-import if magellan mkinitrd; it is a fork of redhats mkinitrd-5.0.8 with all magellan patches and features; deprecates magellan-src/mkinitrd
| 1 | niro | 532 | /* 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 defined(__STDC_VERSION__) && __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 | ||
| 132 | typedef int socklen_t; | ||
| 133 | #endif | ||
| 134 | |||
| 135 | /* ---- Compiler dependent settings ------------------------- */ | ||
| 136 | #if (defined __digital__ && defined __unix__) | ||
| 137 | # undef HAVE_MNTENT_H | ||
| 138 | #else | ||
| 139 | # define HAVE_MNTENT_H 1 | ||
| 140 | #endif /* ___digital__ && __unix__ */ | ||
| 141 | |||
| 142 | /*----- Kernel versioning ------------------------------------*/ | ||
| 143 | #define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c)) | ||
| 144 | |||
| 145 | /* ---- miscellaneous --------------------------------------- */ | ||
| 146 | |||
| 147 | #if defined(__GNU_LIBRARY__) && __GNU_LIBRARY__ < 5 && \ | ||
| 148 | !defined(__dietlibc__) && \ | ||
| 149 | !defined(_NEWLIB_VERSION) && \ | ||
| 150 | !(defined __digital__ && defined __unix__) | ||
| 151 | # error "Sorry, this libc version is not supported :(" | ||
| 152 | #endif | ||
| 153 | |||
| 154 | // Don't perpetuate e2fsck crap into the headers. Clean up e2fsck instead. | ||
| 155 | |||
| 156 | #if defined __GLIBC__ || defined __UCLIBC__ \ | ||
| 157 | || defined __dietlibc__ || defined _NEWLIB_VERSION | ||
| 158 | #include <features.h> | ||
| 159 | #define HAVE_FEATURES_H | ||
| 160 | #include <stdint.h> | ||
| 161 | #define HAVE_STDINT_H | ||
| 162 | #else | ||
| 163 | /* Largest integral types. */ | ||
| 164 | #if __BIG_ENDIAN__ | ||
| 165 | typedef long int intmax_t; | ||
| 166 | typedef unsigned long int uintmax_t; | ||
| 167 | #else | ||
| 168 | __extension__ | ||
| 169 | typedef long long int intmax_t; | ||
| 170 | __extension__ | ||
| 171 | typedef unsigned long long int uintmax_t; | ||
| 172 | #endif | ||
| 173 | #endif | ||
| 174 | |||
| 175 | /* Size-saving "small" ints (arch-dependent) */ | ||
| 176 | #if defined(i386) || defined(__x86_64__) || defined(__mips__) || defined(__cris__) | ||
| 177 | /* add other arches which benefit from this... */ | ||
| 178 | typedef signed char smallint; | ||
| 179 | typedef unsigned char smalluint; | ||
| 180 | #else | ||
| 181 | /* for arches where byte accesses generate larger code: */ | ||
| 182 | typedef int smallint; | ||
| 183 | typedef unsigned smalluint; | ||
| 184 | #endif | ||
| 185 | |||
| 186 | /* uclibc does not implement daemon() for no-mmu systems. | ||
| 187 | * For 0.9.29 and svn, __ARCH_USE_MMU__ indicates no-mmu reliably. | ||
| 188 | * For earlier versions there is no reliable way to check if we are building | ||
| 189 | * for a mmu-less system; the user should pass EXTRA_CFLAGS="-DBB_NOMMU" | ||
| 190 | * on his own. | ||
| 191 | */ | ||
| 192 | #if defined __UCLIBC__ && __UCLIBC_MAJOR__ >= 0 && __UCLIBC_MINOR__ >= 9 && \ | ||
| 193 | __UCLIBC_SUBLEVEL__ > 28 && !defined __ARCH_USE_MMU__ | ||
| 194 | #define BB_NOMMU | ||
| 195 | #endif | ||
| 196 | |||
| 197 | /* Platforms that haven't got dprintf need to implement fdprintf() in | ||
| 198 | * libbb. This would require a platform.c. It's not going to be cleaned | ||
| 199 | * out of the tree, so stop saying it should be. */ | ||
| 200 | #if !defined(__dietlibc__) | ||
| 201 | /* Needed for: glibc */ | ||
| 202 | /* Not needed for: dietlibc */ | ||
| 203 | /* Others: ?? (add as needed) */ | ||
| 204 | #define fdprintf dprintf | ||
| 205 | #endif | ||
| 206 | |||
| 207 | #if defined(__dietlibc__) | ||
| 208 | static ATTRIBUTE_ALWAYS_INLINE char* strchrnul(const char *s, char c) { | ||
| 209 | while (*s && *s != c) ++s; | ||
| 210 | return (char*)s; | ||
| 211 | } | ||
| 212 | #endif | ||
| 213 | |||
| 214 | /* Don't use lchown with glibc older than 2.1.x ... uC-libc lacks it */ | ||
| 215 | #if (defined __GLIBC__ && __GLIBC__ <= 2 && __GLIBC_MINOR__ < 1) || \ | ||
| 216 | defined __UC_LIBC__ | ||
| 217 | # define lchown chown | ||
| 218 | #endif | ||
| 219 | |||
| 220 | /* THIS SHOULD BE CLEANED OUT OF THE TREE ENTIRELY */ | ||
| 221 | /* FIXME: fix tar.c! */ | ||
| 222 | #ifndef FNM_LEADING_DIR | ||
| 223 | #define FNM_LEADING_DIR 0 | ||
| 224 | #endif | ||
| 225 | |||
| 226 | #if (defined __digital__ && defined __unix__) | ||
| 227 | #include <standards.h> | ||
| 228 | #define HAVE_STANDARDS_H | ||
| 229 | #include <inttypes.h> | ||
| 230 | #define HAVE_INTTYPES_H | ||
| 231 | #define PRIu32 "u" | ||
| 232 | |||
| 233 | /* use legacy setpgrp(pidt_,pid_t) for now. move to platform.c */ | ||
| 234 | #define bb_setpgrp do { pid_t __me = getpid(); setpgrp(__me,__me); } while (0) | ||
| 235 | |||
| 236 | #if !defined ADJ_OFFSET_SINGLESHOT && defined MOD_CLKA && defined MOD_OFFSET | ||
| 237 | #define ADJ_OFFSET_SINGLESHOT (MOD_CLKA | MOD_OFFSET) | ||
| 238 | #endif | ||
| 239 | #if !defined ADJ_FREQUENCY && defined MOD_FREQUENCY | ||
| 240 | #define ADJ_FREQUENCY MOD_FREQUENCY | ||
| 241 | #endif | ||
| 242 | #if !defined ADJ_TIMECONST && defined MOD_TIMECONST | ||
| 243 | #define ADJ_TIMECONST MOD_TIMECONST | ||
| 244 | #endif | ||
| 245 | #if !defined ADJ_TICK && defined MOD_CLKB | ||
| 246 | #define ADJ_TICK MOD_CLKB | ||
| 247 | #endif | ||
| 248 | |||
| 249 | #else | ||
| 250 | #define bb_setpgrp setpgrp() | ||
| 251 | #endif | ||
| 252 | |||
| 253 | #if defined(__linux__) | ||
| 254 | #include <sys/mount.h> | ||
| 255 | // Make sure we have all the new mount flags we actually try to use. | ||
| 256 | #ifndef MS_BIND | ||
| 257 | #define MS_BIND (1<<12) | ||
| 258 | #endif | ||
| 259 | #ifndef MS_MOVE | ||
| 260 | #define MS_MOVE (1<<13) | ||
| 261 | #endif | ||
| 262 | #ifndef MS_RECURSIVE | ||
| 263 | #define MS_RECURSIVE (1<<14) | ||
| 264 | #endif | ||
| 265 | #ifndef MS_SILENT | ||
| 266 | #define MS_SILENT (1<<15) | ||
| 267 | #endif | ||
| 268 | |||
| 269 | // The shared subtree stuff, which went in around 2.6.15 | ||
| 270 | #ifndef MS_UNBINDABLE | ||
| 271 | #define MS_UNBINDABLE (1<<17) | ||
| 272 | #endif | ||
| 273 | #ifndef MS_PRIVATE | ||
| 274 | #define MS_PRIVATE (1<<18) | ||
| 275 | #endif | ||
| 276 | #ifndef MS_SLAVE | ||
| 277 | #define MS_SLAVE (1<<19) | ||
| 278 | #endif | ||
| 279 | #ifndef MS_SHARED | ||
| 280 | #define MS_SHARED (1<<20) | ||
| 281 | #endif | ||
| 282 | |||
| 283 | |||
| 284 | #if !defined(BLKSSZGET) | ||
| 285 | #define BLKSSZGET _IO(0x12, 104) | ||
| 286 | #endif | ||
| 287 | #if !defined(BLKGETSIZE64) | ||
| 288 | #define BLKGETSIZE64 _IOR(0x12,114,size_t) | ||
| 289 | #endif | ||
| 290 | #endif | ||
| 291 | |||
| 292 | #endif /* platform.h */ |