MinGW 4.x在\MinGW\include
、\MinGW\include\sys
和\MinGW\lib\gcc\mingw32\4.6.2\include\ssp
中都有unistd.h。
以下是Rob Savoye编写的MinGW版本代码,经Earnie Boyd、Danny Smith、Ramiro Polla、Gregory McGarry和Keith Marshall修改:
#ifndef _UNISTD_H
#define _UNISTD_H 1
#pragma GCC system_header
#include <_mingw.h>
#define __UNISTD_H_SOURCED__ 1
#include <io.h>
#include <process.h>
#include <getopt.h>
#define SEEK_SET 0
#define SEEK_CUR 1
#define SEEK_END 2
#if _POSIX_C_SOURCE
_BEGIN_C_DECLS
__cdecl __MINGW_NOTHROW
int __mingw_sleep( unsigned long, unsigned long );
typedef unsigned long useconds_t __MINGW_ATTRIB_DEPRECATED;
int __cdecl __MINGW_NOTHROW usleep( useconds_t )__MINGW_ATTRIB_DEPRECATED;
#ifndef __NO_INLINE__
__CRT_INLINE __LIBIMPL__(( FUNCTION = usleep ))
int usleep( useconds_t period ){ return __mingw_sleep( 0, 1000 * period ); }
#endif
unsigned __cdecl __MINGW_NOTHROW sleep( unsigned );
#ifndef __NO_INLINE__
__CRT_INLINE __LIBIMPL__(( FUNCTION = sleep ))
unsigned sleep( unsigned period ){ return __mingw_sleep( period, 0 ); }
#endif
int __cdecl ftruncate( int, off_t );
#ifndef __NO_INLINE__
__CRT_INLINE __JMPSTUB__(( FUNCTION = ftruncate, REMAPPED = _chsize ))
int ftruncate( int __fd, off_t __length ){ return _chsize( __fd, __length ); }
#endif
_END_C_DECLS
#endif
#undef __UNISTD_H_SOURCED__
#endif
这个文件需要包含_mingw.h
,代码如下:
#ifndef __MINGW_H
#define __MINGW_H
#define __MINGW32_VERSION 3022001L
#define __MINGW32_MAJOR_VERSION 3
#define __MINGW32_MINOR_VERSION 22
#define __MINGW32_PATCHLEVEL 1
#if __GNUC__ >= 3 && ! defined __PCC__
#pragma GCC system_header
#endif
#ifndef _MSVCRTVER_H
# include <msvcrtver.h>
#endif
#include <w32api.h>
#define __CRT_GLOB_USE_MSVCRT__ 0x0001
#define __CRT_GLOB_USE_MINGW__ 0x0002
#define __CRT_GLOB_USE_SINGLE_QUOTE__ 0x0010
#define __CRT_GLOB_BRACKET_GROUPS__ 0x0020
#define __CRT_GLOB_CASE_SENSITIVE__ 0x0040
#define __CRT_GLOB_ESCAPE_CHAR__ (char)(127)
#define __MINGW_ANSI_STDIO__ 0x0000000000000001ULL
#define __MINGW_LC_EXTENSIONS__ 0x0000000000000050ULL
#define __MINGW_LC_MESSAGES__ 0x0000000000000010ULL
#define __MINGW_LC_ENVVARS__ 0x0000000000000040ULL
#undef __attribute__
#if defined (__PCC__)
# undef __DECLSPEC_SUPPORTED
# ifndef __MINGW_IMPORT
# define __MINGW_IMPORT extern
# endif
# ifndef _CRTIMP
# define _CRTIMP
# endif
# ifndef __cdecl
# define __cdecl _Pragma("cdecl")
# endif
# ifndef __stdcall
# define __stdcall _Pragma("stdcall")
# endif
# ifndef __int64
# define __int64 long long
# endif
# ifndef __int32
# define __int32 long
# endif
# ifndef __int16
# define __int16 short
# endif
# ifndef __int8
# define __int8 char
# endif
# ifndef __small
# define __small char
# endif
# ifndef __hyper
# define __hyper long long
# endif
# ifndef __volatile__
# define __volatile__ volatile
# endif
# ifndef __restrict__
# define __restrict__ restrict
# endif
# define NONAMELESSUNION
#elif defined(__GNUC__)
# ifdef __declspec
# ifndef __MINGW_IMPORT
# define __MINGW_IMPORT extern __attribute__((__dllimport__))
# endif
# ifndef _CRTIMP
# ifdef __USE_CRTIMP
# define _CRTIMP __attribute__((dllimport))
# else
# define _CRTIMP
# endif
# endif
# define __DECLSPEC_SUPPORTED
# else
# undef __DECLSPEC_SUPPORTED
# undef __MINGW_IMPORT
# ifndef _CRTIMP
# define _CRTIMP
# endif
# endif
# ifndef __cdecl
# define __cdecl __attribute__((__cdecl__))
# endif
# ifndef __stdcall
# define __stdcall __attribute__((__stdcall__))
# endif
# ifndef __int64
# define __int64 long long
# endif
# ifndef __int32
# define __int32 long
# endif
# ifndef __int16
# define __int16 short
# endif
# ifndef __int8
# define __int8 char
# endif
# ifndef __small
# define __small char
# endif
# ifndef __hyper
# define __hyper long long
# endif
#else
# ifndef __MINGW_IMPORT
# define __MINGW_IMPORT __declspec(dllimport)
# endif
# ifndef _CRTIMP
# define _CRTIMP __declspec(dllimport)
# endif
# define __DECLSPEC_SUPPORTED
# define __attribute__(x)
#endif
#if defined (__GNUC__) && defined (__GNUC_MINOR__)
#define __MINGW_GNUC_PREREQ(major, minor) \
(__GNUC__ > (major) \
|| (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
#else
#define __MINGW_GNUC_PREREQ(major, minor) 0
#endif
#ifdef __cplusplus
# define __CRT_INLINE inline
#else
# if __GNUC_STDC_INLINE__
# define __CRT_INLINE extern inline __attribute__((__gnu_inline__))
# else
# define __CRT_INLINE extern __inline__
# endif
#endif
# ifdef __GNUC__
# define _CRTALIAS __CRT_INLINE __attribute__((__always_inline__))
# define __CRT_ALIAS __CRT_INLINE __attribute__((__always_inline__))
# else
# define _CRTALIAS __CRT_INLINE
# define __CRT_ALIAS __CRT_INLINE
# endif
#define __JMPSTUB__(__BUILD_HINT__)
#define __LIBIMPL__(__BUILD_HINT__)
#ifdef __cplusplus
# define __UNUSED_PARAM(x)
#else
# ifdef __GNUC__
# define __UNUSED_PARAM(x) x __attribute__((__unused__))
# else
# define __UNUSED_PARAM(x) x
# endif
#endif
#ifdef __GNUC__
#define __MINGW_ATTRIB_NORETURN __attribute__((__noreturn__))
#define __MINGW_ATTRIB_CONST __attribute__((__const__))
#else
#define __MINGW_ATTRIB_NORETURN
#define __MINGW_ATTRIB_CONST
#endif
#if __MINGW_GNUC_PREREQ (3, 0)
#define __MINGW_ATTRIB_MALLOC __attribute__((__malloc__))
#define __MINGW_ATTRIB_PURE __attribute__((__pure__))
#else
#define __MINGW_ATTRIB_MALLOC
#define __MINGW_ATTRIB_PURE
#endif
#if __MINGW_GNUC_PREREQ (3, 3)
#define __MINGW_ATTRIB_NONNULL(arg) __attribute__((__nonnull__(arg)))
#else
#define __MINGW_ATTRIB_NONNULL(arg)
#endif
#if __MINGW_GNUC_PREREQ (3, 1)
#define __MINGW_ATTRIB_DEPRECATED __attribute__((__deprecated__))
#else
#define __MINGW_ATTRIB_DEPRECATED
#endif
#if __MINGW_GNUC_PREREQ (3, 3)
#define __MINGW_NOTHROW __attribute__((__nothrow__))
#else
#define __MINGW_NOTHROW
#endif
#ifndef __USE_MINGW_ANSI_STDIO
# if defined __STRICT_ANSI__ || defined _ISOC99_SOURCE \
|| defined _POSIX_SOURCE || defined _POSIX_C_SOURCE \
|| defined _XOPEN_SOURCE || defined _XOPEN_SOURCE_EXTENDED \
|| defined _GNU_SOURCE || defined _BSD_SOURCE \
|| defined _SVID_SOURCE
# define __USE_MINGW_ANSI_STDIO 1
# else
# define __USE_MINGW_ANSI_STDIO (__MINGW_FEATURES__ & __MINGW_ANSI_STDIO__)
# endif
#endif
#ifndef _POSIX_C_SOURCE
# if defined _XOPEN_SOURCE
# if _XOPEN_SOURCE < 500
# define _POSIX_C_SOURCE 1L
# elif _XOPEN_SOURCE < 600
# define _POSIX_C_SOURCE 199506L
# elif _XOPEN_SOURCE < 700
# define _POSIX_C_SOURCE 200112L
# else
# define _POSIX_C_SOURCE 200809L
# endif
# elif defined _GNU_SOURCE || defined _BSD_SOURCE || ! defined __STRICT_ANSI__
# define _POSIX_C_SOURCE 200809L
# elif defined _POSIX_SOURCE
# define _POSIX_C_SOURCE 1L
# endif
#endif
#ifndef _ISOC99_SOURCE
# if __STDC_VERSION__ >= 199901L || _POSIX_C_SOURCE >= 200112L
# define _ISOC99_SOURCE 1
# endif
#endif
#if ! defined _MINGW32_SOURCE_EXTENDED && ! defined __STRICT_ANSI__
# define _MINGW32_SOURCE_EXTENDED 1
#endif
#endif
其他包含文件应该符合您的环境标准。
ssize_t
应该是long
(即 64 位)。 - Cornstalks