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Diffstat (limited to 'include/platform.h')
| -rw-r--r-- | include/platform.h | 276 |
1 files changed, 276 insertions, 0 deletions
diff --git a/include/platform.h b/include/platform.h new file mode 100644 index 000000000..345e9cb7a --- /dev/null +++ b/include/platform.h @@ -0,0 +1,276 @@ +/* vi: set sw=4 ts=4: */ +/* + Copyright 2006, Bernhard Fischer + + Licensed under the GPL v2 or later, see the file LICENSE in this tarball. +*/ +#ifndef __PLATFORM_H +#define __PLATFORM_H 1 + +/* Convenience macros to test the version of gcc. */ +#undef __GNUC_PREREQ +#if defined __GNUC__ && defined __GNUC_MINOR__ +# define __GNUC_PREREQ(maj, min) \ + ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min)) +#else +# define __GNUC_PREREQ(maj, min) 0 +#endif + +/* __restrict is known in EGCS 1.2 and above. */ +#if !__GNUC_PREREQ (2,92) +# ifndef __restrict +# define __restrict /* Ignore */ +# endif +#endif + +/* Define macros for some gcc attributes. This permits us to use the + macros freely, and know that they will come into play for the + version of gcc in which they are supported. */ + +#if !__GNUC_PREREQ (2,7) +# ifndef __attribute__ +# define __attribute__(x) +# endif +#endif + +#undef inline +#if defined(__STDC_VERSION__) && __STDC_VERSION__ > 199901L +/* it's a keyword */ +#else +# if __GNUC_PREREQ (2,7) +# define inline __inline__ +# else +# define inline +# endif +#endif + +#ifndef __const +# define __const const +#endif + +# define ATTRIBUTE_UNUSED __attribute__ ((__unused__)) +# define ATTRIBUTE_NORETURN __attribute__ ((__noreturn__)) +# define ATTRIBUTE_PACKED __attribute__ ((__packed__)) +# define ATTRIBUTE_ALIGNED(m) __attribute__ ((__aligned__(m))) +# if __GNUC_PREREQ (3,0) +# define ATTRIBUTE_ALWAYS_INLINE __attribute__ ((always_inline)) inline +# else +# define ATTRIBUTE_ALWAYS_INLINE inline +# endif + +/* -fwhole-program makes all symbols local. The attribute externally_visible + forces a symbol global. */ +# if __GNUC_PREREQ (4,1) +# define ATTRIBUTE_EXTERNALLY_VISIBLE __attribute__ ((__externally_visible__)) +# else +# define ATTRIBUTE_EXTERNALLY_VISIBLE +# endif /* GNUC >= 4.1 */ + +/* We use __extension__ in some places to suppress -pedantic warnings + about GCC extensions. This feature didn't work properly before + gcc 2.8. */ +#if !__GNUC_PREREQ (2,8) +# ifndef __extension__ +# define __extension__ +# endif +#endif + +/* gcc-2.95 had no va_copy but only __va_copy. */ +#if !__GNUC_PREREQ (3,0) +# include <stdarg.h> +# if !defined va_copy && defined __va_copy +# define va_copy(d,s) __va_copy((d),(s)) +# endif +#endif + +/* ---- Endian Detection ------------------------------------ */ + +#if (defined __digital__ && defined __unix__) +# include <sex.h> +# define __BIG_ENDIAN__ (BYTE_ORDER == BIG_ENDIAN) +# define __BYTE_ORDER BYTE_ORDER +#elif !defined __APPLE__ +# include <byteswap.h> +# include <endian.h> +#endif + +#ifdef __BIG_ENDIAN__ +# define BB_BIG_ENDIAN 1 +# define BB_LITTLE_ENDIAN 0 +#elif __BYTE_ORDER == __BIG_ENDIAN +# define BB_BIG_ENDIAN 1 +# define BB_LITTLE_ENDIAN 0 +#else +# define BB_BIG_ENDIAN 0 +# define BB_LITTLE_ENDIAN 1 +#endif + +#if BB_BIG_ENDIAN +#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 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 + +/* ---- Networking ------------------------------------------ */ +#ifndef __APPLE__ +# include <arpa/inet.h> +#else +# include <netinet/in.h> +#endif + +#ifndef __socklen_t_defined +typedef int socklen_t; +#endif + +/* ---- Compiler dependent settings ------------------------- */ +#ifndef __GNUC__ +#if defined __INTEL_COMPILER +__extension__ typedef __signed__ long long __s64; +__extension__ typedef unsigned long long __u64; +#endif /* __INTEL_COMPILER */ +#endif /* ifndef __GNUC__ */ + +#if (defined __digital__ && defined __unix__) +# undef HAVE_MNTENT_H +#else +# define HAVE_MNTENT_H 1 +#endif /* ___digital__ && __unix__ */ + +/*----- Kernel versioning ------------------------------------*/ +#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c)) + +/* ---- miscellaneous --------------------------------------- */ + +#if defined(__GNU_LIBRARY__) && __GNU_LIBRARY__ < 5 && \ + !defined(__dietlibc__) && \ + !defined(_NEWLIB_VERSION) && \ + !(defined __digital__ && defined __unix__) +# error "Sorry, this libc version is not supported :(" +#endif + +// Don't perpetuate e2fsck crap into the headers. Clean up e2fsck instead. + +#if defined __GLIBC__ || defined __UCLIBC__ \ + || defined __dietlibc__ || defined _NEWLIB_VERSION +#include <features.h> +#define HAVE_FEATURES_H +#include <stdint.h> +#define HAVE_STDINT_H +#else +/* Largest integral types. */ +#if __BIG_ENDIAN__ +typedef long int intmax_t; +typedef unsigned long int uintmax_t; +#else +__extension__ +typedef long long int intmax_t; +__extension__ +typedef unsigned long long int uintmax_t; +#endif +#endif + +/* uclibc does not implement daemon() for no-mmu systems. + * For 0.9.29 and svn, __ARCH_USE_MMU__ indicates no-mmu reliably. + * For earlier versions there is no reliable way to check if we are building + * for a mmu-less system; the user should pass EXTRA_CFLAGS="-DBB_NOMMU" + * on his own. + */ +#if defined __UCLIBC__ && __UCLIBC_MAJOR__ >= 0 && __UCLIBC_MINOR__ >= 9 && \ + __UCLIBC_SUBLEVEL__ > 28 && !defined __ARCH_USE_MMU__ +#define BB_NOMMU +#endif + +/* Platforms that haven't got dprintf need to implement fdprintf() in + * libbb. This would require a platform.c. It's not going to be cleaned + * out of the tree, so stop saying it should be. */ +#define fdprintf dprintf + +/* Don't use lchown with glibc older then 2.1.x ... uC-libc lacks it */ +#if (defined __GLIBC__ && __GLIBC__ <= 2 && __GLIBC_MINOR__ < 1) || \ + defined __UC_LIBC__ +# define lchown chown +#endif + +/* THIS SHOULD BE CLEANED OUT OF THE TREE ENTIRELY */ +/* FIXME: fix tar.c! */ +#ifndef FNM_LEADING_DIR +#define FNM_LEADING_DIR 0 +#endif + +#if (defined __digital__ && defined __unix__) +#include <standards.h> +#define HAVE_STANDARDS_H +#include <inttypes.h> +#define HAVE_INTTYPES_H +#define PRIu32 "u" + +/* use legacy setpgrp(pidt_,pid_t) for now. move to platform.c */ +#define bb_setpgrp do{pid_t __me = getpid();setpgrp(__me,__me);}while(0) + +#if !defined ADJ_OFFSET_SINGLESHOT && defined MOD_CLKA && defined MOD_OFFSET +#define ADJ_OFFSET_SINGLESHOT (MOD_CLKA | MOD_OFFSET) +#endif +#if !defined ADJ_FREQUENCY && defined MOD_FREQUENCY +#define ADJ_FREQUENCY MOD_FREQUENCY +#endif +#if !defined ADJ_TIMECONST && defined MOD_TIMECONST +#define ADJ_TIMECONST MOD_TIMECONST +#endif +#if !defined ADJ_TICK && defined MOD_CLKB +#define ADJ_TICK MOD_CLKB +#endif + +#else +#define bb_setpgrp setpgrp() +#endif + +#if defined(__linux__) +#include <sys/mount.h> +// Make sure we have all the new mount flags we actually try to use. +#ifndef MS_BIND +#define MS_BIND (1<<12) +#endif +#ifndef MS_MOVE +#define MS_MOVE (1<<13) +#endif +#ifndef MS_RECURSIVE +#define MS_RECURSIVE (1<<14) +#endif +#ifndef MS_SILENT +#define MS_SILENT (1<<15) +#endif + +// The shared subtree stuff, which went in around 2.6.15 +#ifndef MS_UNBINDABLE +#define MS_UNBINDABLE (1<<17) +#endif +#ifndef MS_PRIVATE +#define MS_PRIVATE (1<<18) +#endif +#ifndef MS_SLAVE +#define MS_SLAVE (1<<19) +#endif +#ifndef MS_SHARED +#define MS_SHARED (1<<20) +#endif + + +#if !defined(BLKSSZGET) +#define BLKSSZGET _IO(0x12, 104) +#endif +#if !defined(BLKGETSIZE64) +#define BLKGETSIZE64 _IOR(0x12,114,size_t) +#endif +#endif + +#endif /* platform.h */ |