diff options
Diffstat (limited to 'include/platform.h')
| -rw-r--r-- | include/platform.h | 157 |
1 files changed, 82 insertions, 75 deletions
diff --git a/include/platform.h b/include/platform.h index 2b57cd5..2b84447 100644 --- a/include/platform.h +++ b/include/platform.h @@ -7,23 +7,6 @@ #ifndef BB_PLATFORM_H #define BB_PLATFORM_H 1 -/* Assume all these functions exist by default. Platforms where it is not - * true will #undef them below. - */ -#define HAVE_CLEARENV 1 -#define HAVE_FDATASYNC 1 -#define HAVE_DPRINTF 1 -#define HAVE_MEMRCHR 1 -#define HAVE_MKDTEMP 1 -#define HAVE_PTSNAME_R 1 -#define HAVE_SETBIT 1 -#define HAVE_SIGHANDLER_T 1 -#define HAVE_STPCPY 1 -#define HAVE_STRCASESTR 1 -#define HAVE_STRCHRNUL 1 -#define HAVE_STRSEP 1 -#define HAVE_STRSIGNAL 1 -#define HAVE_VASPRINTF 1 /* Convenience macros to test the version of gcc. */ #undef __GNUC_PREREQ @@ -41,10 +24,6 @@ # 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) @@ -98,7 +77,7 @@ #endif /* -fwhole-program makes all symbols local. The attribute externally_visible - forces a symbol global. */ + * forces a symbol global. */ #if __GNUC_PREREQ(4,1) # define EXTERNALLY_VISIBLE __attribute__(( visibility("default") )) //__attribute__ ((__externally_visible__)) @@ -114,22 +93,14 @@ #endif /* We use __extension__ in some places to suppress -pedantic warnings - about GCC extensions. This feature didn't work properly before - gcc 2.8. */ + * 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 - /* FAST_FUNC is a qualifier which (possibly) makes function call faster * and/or smaller by using modified ABI. It is usually only needed * on non-static, busybox internal functions. Recent versions of gcc @@ -153,6 +124,15 @@ # define POP_SAVED_FUNCTION_VISIBILITY #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 ------------------------------------ */ #include <limits.h> @@ -220,6 +200,7 @@ # define IF_LITTLE_ENDIAN(...) __VA_ARGS__ #endif + /* ---- Unaligned access ------------------------------------ */ #include <stdint.h> @@ -252,37 +233,9 @@ typedef uint32_t bb__aliased_uint32_t FIX_ALIASING; } while (0) #endif -/* ---- Compiler dependent settings ------------------------- */ -#if (defined __digital__ && defined __unix__) \ - || defined __APPLE__ \ - || defined __FreeBSD__ || defined __OpenBSD__ || defined __NetBSD__ -# undef HAVE_CLEARENV -# undef HAVE_FDATASYNC -# undef HAVE_MNTENT_H -# undef HAVE_PTSNAME_R -# undef HAVE_SYS_STATFS_H -# undef HAVE_SIGHANDLER_T -# undef HAVE_XTABS -# undef HAVE_DPRINTF -#else -# define HAVE_MNTENT_H 1 -# define HAVE_SYS_STATFS_H 1 -# define HAVE_XTABS 1 -#endif - -/*----- Kernel versioning ------------------------------------*/ - -#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c)) - -/* ---- Miscellaneous --------------------------------------- */ +/* ---- Size-saving "small" ints (arch-dependent) ----------- */ -#if defined __GLIBC__ || defined __UCLIBC__ \ - || defined __dietlibc__ || defined _NEWLIB_VERSION -# include <features.h> -#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; @@ -302,7 +255,34 @@ typedef unsigned smalluint; # include <stdbool.h> #endif -/* Try to defeat gcc's alignment of "char message[]"-like data */ + +/*----- Kernel versioning ------------------------------------*/ + +#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c)) + + +/* ---- Miscellaneous --------------------------------------- */ + +#if defined __GLIBC__ \ + || defined __UCLIBC__ \ + || defined __dietlibc__ \ + || defined _NEWLIB_VERSION +# include <features.h> +#endif + +/* Define bb_setpgrp */ +#if defined(__digital__) && defined(__unix__) +/* 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) +#else +# define bb_setpgrp() setpgrp() +#endif + +/* fdprintf is more readable, we used it before dprintf was standardized */ +#include <unistd.h> +#define fdprintf dprintf + +/* Useful for defeating 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))) @@ -314,8 +294,7 @@ typedef unsigned smalluint; # define ALIGN4 #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. @@ -333,12 +312,9 @@ typedef unsigned smalluint; #endif #if defined(__digital__) && defined(__unix__) - # include <standards.h> # include <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 @@ -351,17 +327,31 @@ typedef unsigned smalluint; # if !defined ADJ_TICK && defined MOD_CLKB # define ADJ_TICK MOD_CLKB # endif +#endif -# undef HAVE_STPCPY - -#else -# define bb_setpgrp() setpgrp() +/* ---- Who misses what? ------------------------------------ */ -#endif - -#include <unistd.h> -#define fdprintf dprintf +/* Assume all these functions exist by default. Platforms where it is not + * true will #undef them below. + */ +#define HAVE_CLEARENV 1 +#define HAVE_FDATASYNC 1 +#define HAVE_DPRINTF 1 +#define HAVE_MEMRCHR 1 +#define HAVE_MKDTEMP 1 +#define HAVE_PTSNAME_R 1 +#define HAVE_SETBIT 1 +#define HAVE_SIGHANDLER_T 1 +#define HAVE_STPCPY 1 +#define HAVE_STRCASESTR 1 +#define HAVE_STRCHRNUL 1 +#define HAVE_STRSEP 1 +#define HAVE_STRSIGNAL 1 +#define HAVE_VASPRINTF 1 +#define HAVE_MNTENT_H 1 +#define HAVE_SYS_STATFS_H 1 +#define HAVE_XTABS 1 #if defined(__dietlibc__) # undef HAVE_STRCHRNUL @@ -384,6 +374,23 @@ typedef unsigned smalluint; # undef HAVE_STRCHRNUL #endif +#if (defined __digital__ && defined __unix__) \ + || defined __APPLE__ \ + || defined __FreeBSD__ || defined __OpenBSD__ || defined __NetBSD__ +# undef HAVE_CLEARENV +# undef HAVE_FDATASYNC +# undef HAVE_MNTENT_H +# undef HAVE_PTSNAME_R +# undef HAVE_SYS_STATFS_H +# undef HAVE_SIGHANDLER_T +# undef HAVE_XTABS +# undef HAVE_DPRINTF +#endif + +#if defined(__digital__) && defined(__unix__) +# undef HAVE_STPCPY +#endif + /* * Now, define prototypes for all the functions defined in platform.c * These must come after all the HAVE_* macros are defined (or not) |