X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=include%2Fplatform.h;h=51934853b777106c48fc87e2d9785663df631ed2;hb=0b6c6a9c9f555a33d681290cce77510460457c03;hp=773d6b8b22cb380afc5fc34a9f83884a73397f14;hpb=9f4a1e1c75e86a38da22a3e82980fcddc4e58717;p=oweals%2Fbusybox.git diff --git a/include/platform.h b/include/platform.h index 773d6b8b2..51934853b 100644 --- a/include/platform.h +++ b/include/platform.h @@ -1,3 +1,4 @@ +/* vi: set sw=4 ts=4: */ /* Copyright 2006, Bernhard Fischer @@ -10,7 +11,7 @@ #undef __GNUC_PREREQ #if defined __GNUC__ && defined __GNUC_MINOR__ # define __GNUC_PREREQ(maj, min) \ - ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min)) + ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min)) #else # define __GNUC_PREREQ(maj, min) 0 #endif @@ -32,42 +33,52 @@ # endif #endif -#if 0 -/* Attribute __malloc__ on functions was valid as of gcc 2.96. */ -#ifndef ATTRIBUTE_MALLOC -# if __GNUC_PREREQ (2,96) -# define ATTRIBUTE_MALLOC __attribute__ ((__malloc__)) +#undef inline +#if defined(__STDC_VERSION__) && __STDC_VERSION__ > 199901L +/* it's a keyword */ +#else +# if __GNUC_PREREQ (2,7) +# define inline __inline__ # else -# define ATTRIBUTE_MALLOC -# endif /* GNUC >= 2.96 */ -#endif /* ATTRIBUTE_MALLOC */ +# define inline +# endif #endif -#ifndef ATTRIBUTE_UNUSED -#define ATTRIBUTE_UNUSED __attribute__ ((__unused__)) -#endif /* ATTRIBUTE_UNUSED */ - -#ifndef ATTRIBUTE_NORETURN -#define ATTRIBUTE_NORETURN __attribute__ ((__noreturn__)) -#endif /* ATTRIBUTE_NORETURN */ - -#ifndef ATTRIBUTE_PACKED -#define ATTRIBUTE_PACKED __attribute__ ((__packed__)) -#endif /* ATTRIBUTE_NORETURN */ +#ifndef __const +# define __const const +#endif -#ifndef ATTRIBUTE_ALIGNED -#define ATTRIBUTE_ALIGNED(m) __attribute__ ((__aligned__(m))) -#endif /* ATTRIBUTE_ALIGNED */ +# define ATTRIBUTE_UNUSED __attribute__ ((__unused__)) +# define ATTRIBUTE_NORETURN __attribute__ ((__noreturn__)) +# define ATTRIBUTE_PACKED __attribute__ ((__packed__)) +# define ATTRIBUTE_ALIGNED(m) __attribute__ ((__aligned__(m))) +/* __NO_INLINE__: some gcc's do not honor inlining! :( */ +# if __GNUC_PREREQ (3,0) && !defined(__NO_INLINE__) +# define ALWAYS_INLINE __attribute__ ((always_inline)) inline +/* I've seen a toolchain where I needed __noinline__ instead of noinline */ +# define NOINLINE __attribute__((__noinline__)) +# if !ENABLE_WERROR +# define ATTRIBUTE_DEPRECATED __attribute__ ((__deprecated__)) +# define ATTRIBUTE_UNUSED_RESULT __attribute__ ((warn_unused_result)) +# else +# define ATTRIBUTE_DEPRECATED /* n/a */ +# define ATTRIBUTE_UNUSED_RESULT /* n/a */ +# endif +# else +# define ALWAYS_INLINE inline /* n/a */ +# define NOINLINE /* n/a */ +# define ATTRIBUTE_DEPRECATED /* n/a */ +# define ATTRIBUTE_UNUSED_RESULT /* n/a */ +# endif /* -fwhole-program makes all symbols local. The attribute externally_visible forces a symbol global. */ -#ifndef ATTRIBUTE_EXTERNALLY_VISIBLE # if __GNUC_PREREQ (4,1) -# define ATTRIBUTE_EXTERNALLY_VISIBLE __attribute__ ((__externally_visible__)) +# define EXTERNALLY_VISIBLE __attribute__(( visibility("default") )); +//__attribute__ ((__externally_visible__)) # else -# define ATTRIBUTE_EXTERNALLY_VISIBLE +# define EXTERNALLY_VISIBLE # endif /* GNUC >= 4.1 */ -#endif /* ATTRIBUTE_EXTERNALLY_VISIBLE */ /* We use __extension__ in some places to suppress -pedantic warnings about GCC extensions. This feature didn't work properly before @@ -78,9 +89,250 @@ # endif #endif +/* gcc-2.95 had no va_copy but only __va_copy. */ +#if !__GNUC_PREREQ (3,0) +# include +# 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 +# define __BIG_ENDIAN__ (BYTE_ORDER == BIG_ENDIAN) +# define __BYTE_ORDER BYTE_ORDER +#elif !defined __APPLE__ +# include +# include +#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 +# ifndef __socklen_t_defined +typedef int socklen_t; +# endif +#else +# include +#endif + +/* ---- Compiler dependent settings ------------------------- */ +#if (defined __digital__ && defined __unix__) || defined __APPLE__ +# undef HAVE_MNTENT_H +# undef HAVE_SYS_STATFS_H +#else +# define HAVE_MNTENT_H 1 +# define HAVE_SYS_STATFS_H 1 +#endif /* ___digital__ && __unix__ */ + +/* linux/loop.h relies on __u64. Make sure we have that as a proper type + * until userspace is widely fixed. */ +#if (defined __INTEL_COMPILER && !defined __GNUC__) || \ + (defined __GNUC__ && defined __STRICT_ANSI__) +__extension__ typedef __signed__ long long __s64; +__extension__ typedef unsigned long long __u64; +#endif + +/*----- 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 +#define HAVE_FEATURES_H +#include +#define HAVE_STDINT_H +#elif !defined __APPLE__ +/* Largest integral types. */ +#if __BIG_ENDIAN__ +typedef long intmax_t; +typedef unsigned long uintmax_t; +#else +__extension__ +typedef long long intmax_t; +__extension__ +typedef unsigned long long uintmax_t; +#endif +#endif + +/* Size-saving "small" ints (arch-dependent) */ +#if defined(i386) || defined(__x86_64__) || defined(__mips__) || defined(__cris__) +/* add other arches which benefit from this... */ +typedef signed char smallint; +typedef unsigned char smalluint; +#else +/* for arches where byte accesses generate larger code: */ +typedef int smallint; +typedef unsigned smalluint; +#endif + +/* ISO C Standard: 7.16 Boolean type and values */ +#if (defined __digital__ && defined __unix__) +/* old system without (proper) C99 support */ +#define bool smalluint +#else +/* modern system, so use it */ +#include +#endif + +/* Try to defeat gcc's alignment of "char message[]"-like data */ +#if 1 /* if needed: !defined(arch1) && !defined(arch2) */ +#define ALIGN1 __attribute__((aligned(1))) +#define ALIGN2 __attribute__((aligned(2))) +#else +/* Arches which MUST have 2 or 4 byte alignment for everything are here */ +#define ALIGN1 +#define ALIGN2 +#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. + */ +#if ENABLE_NOMMU || \ + (defined __UCLIBC__ && __UCLIBC_MAJOR__ >= 0 && __UCLIBC_MINOR__ >= 9 && \ + __UCLIBC_SUBLEVEL__ > 28 && !defined __ARCH_USE_MMU__) +#define BB_MMU 0 +#define BB_NOMMU 1 +#define USE_FOR_NOMMU(...) __VA_ARGS__ +#define USE_FOR_MMU(...) +#else +#define BB_MMU 1 +/* BB_NOMMU is not defined in this case! */ +#define USE_FOR_NOMMU(...) +#define USE_FOR_MMU(...) __VA_ARGS__ +#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. */ +#if !defined(__dietlibc__) +/* Needed for: glibc */ +/* Not needed for: dietlibc */ +/* Others: ?? (add as needed) */ +#define fdprintf dprintf +#endif + +#if defined(__dietlibc__) +static ALWAYS_INLINE char* strchrnul(const char *s, char c) +{ + while (*s && *s != c) ++s; + return (char*)s; +} +#endif + +/* Don't use lchown with glibc older than 2.1.x ... uClibc lacks it */ +#if (defined __GLIBC__ && __GLIBC__ <= 2 && __GLIBC_MINOR__ < 1) || \ + defined __UC_LIBC__ +# define lchown chown +#endif + +#if (defined __digital__ && defined __unix__) +#include +#define HAVE_STANDARDS_H +#include +#define HAVE_INTTYPES_H +#define PRIu32 "u" + +/* use legacy setpgrp(pid_t,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 +/* 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 -/* include USAGE_APPLET_x helper macros for usage.h. */ -/* -#include "_usage.h" -*/ #endif /* platform.h */