config.h

ARM上的如果你对底层感兴趣

 *	See HAS_SIGSETJMP.
 */
/* Siglongjmp:
 *	This macro is used in the same way as siglongjmp(), but will invoke
 *	traditional longjmp() if siglongjmp isn't available.
 *	See HAS_SIGSETJMP.
 */
/*#define HAS_SIGSETJMP	/**/
#ifdef HAS_SIGSETJMP
#define Sigjmp_buf sigjmp_buf
#define Sigsetjmp(buf,save_mask) sigsetjmp((buf),(save_mask))
#define Siglongjmp(buf,retval) siglongjmp((buf),(retval))
#else
#define Sigjmp_buf jmp_buf
#define Sigsetjmp(buf,save_mask) setjmp((buf))
#define Siglongjmp(buf,retval) longjmp((buf),(retval))
#endif

/* USE_STDIO_PTR:
 *	This symbol is defined if the _ptr and _cnt fields (or similar)
 *	of the stdio FILE structure can be used to access the stdio buffer
 *	for a file handle.  If this is defined, then the FILE_ptr(fp)
 *	and FILE_cnt(fp) macros will also be defined and should be used
 *	to access these fields.
 */
/* FILE_ptr:
 *	This macro is used to access the _ptr field (or equivalent) of the
 *	FILE structure pointed to by its argument. This macro will always be
 *	defined if USE_STDIO_PTR is defined.
 */
/* STDIO_PTR_LVALUE:
 *	This symbol is defined if the FILE_ptr macro can be used as an
 *	lvalue.
 */
/* FILE_cnt:
 *	This macro is used to access the _cnt field (or equivalent) of the
 *	FILE structure pointed to by its argument. This macro will always be
 *	defined if USE_STDIO_PTR is defined.
 */
/* STDIO_CNT_LVALUE:
 *	This symbol is defined if the FILE_cnt macro can be used as an
 *	lvalue.
 */
#define USE_STDIO_PTR 	/**/
#ifdef USE_STDIO_PTR
#define FILE_ptr(fp)	((fp)->_ptr)
#define STDIO_PTR_LVALUE 		/**/
#define FILE_cnt(fp)	((fp)->_cnt)
#define STDIO_CNT_LVALUE 		/**/
#endif

/* USE_STDIO_BASE:
 *	This symbol is defined if the _base field (or similar) of the
 *	stdio FILE structure can be used to access the stdio buffer for
 *	a file handle.  If this is defined, then the FILE_base(fp) macro
 *	will also be defined and should be used to access this field.
 *	Also, the FILE_bufsiz(fp) macro will be defined and should be used
 *	to determine the number of bytes in the buffer.  USE_STDIO_BASE
 *	will never be defined unless USE_STDIO_PTR is.
 */
/* FILE_base:
 *	This macro is used to access the _base field (or equivalent) of the
 *	FILE structure pointed to by its argument. This macro will always be
 *	defined if USE_STDIO_BASE is defined.
 */
/* FILE_bufsiz:
 *	This macro is used to determine the number of bytes in the I/O
 *	buffer pointed to by _base field (or equivalent) of the FILE
 *	structure pointed to its argument. This macro will always be defined
 *	if USE_STDIO_BASE is defined.
 */
#define USE_STDIO_BASE 	/**/
#ifdef USE_STDIO_BASE
#define FILE_base(fp)	((fp)->_base)
#define FILE_bufsiz(fp)	((fp)->_cnt + (fp)->_ptr - (fp)->_base)
#endif

/* HAS_VPRINTF:
 *	This symbol, if defined, indicates that the vprintf routine is available
 *	to printf with a pointer to an argument list.  If unavailable, you
 *	may need to write your own, probably in terms of _doprnt().
 */
/* USE_CHAR_VSPRINTF:
 *	This symbol is defined if this system has vsprintf() returning type
 *	(char*).  The trend seems to be to declare it as "int vsprintf()".  It
 *	is up to the package author to declare vsprintf correctly based on the
 *	symbol.
 */
#define HAS_VPRINTF	/**/
/*#define USE_CHAR_VSPRINTF 	/**/

/* DOUBLESIZE:
 *	This symbol contains the size of a double, so that the C preprocessor
 *	can make decisions based on it.
 */
#define DOUBLESIZE 8		/**/

/* I_TIME:
 *	This symbol, if defined, indicates to the C program that it should
 *	include <time.h>.
 */
/* I_SYS_TIME:
 *	This symbol, if defined, indicates to the C program that it should
 *	include <sys/time.h>.
 */
/* I_SYS_TIME_KERNEL:
 *	This symbol, if defined, indicates to the C program that it should
 *	include <sys/time.h> with KERNEL defined.
 */
#define I_TIME		/**/
/*#define I_SYS_TIME		/**/
/*#define I_SYS_TIME_KERNEL		/**/

/* INTSIZE:
 *	This symbol contains the value of sizeof(int) so that the C
 *	preprocessor can make decisions based on it.
 */
/* LONGSIZE:
 *	This symbol contains the value of sizeof(long) so that the C
 *	preprocessor can make decisions based on it.
 */
/* SHORTSIZE:
 *	This symbol contains the value of sizeof(short) so that the C
 *	preprocessor can make decisions based on it.
 */
#define INTSIZE 4		/**/
#define LONGSIZE 4		/**/
#define SHORTSIZE 2		/**/

/* VAL_O_NONBLOCK:
 *	This symbol is to be used during open() or fcntl(F_SETFL) to turn on
 *	non-blocking I/O for the file descriptor. Note that there is no way
 *	back, i.e. you cannot turn it blocking again this way. If you wish to
 *	alternatively switch between blocking and non-blocking, use the
 *	ioctl(FIOSNBIO) call instead, but that is not supported by all devices.
 */
/* VAL_EAGAIN:
 *	This symbol holds the errno error code set by read() when no data was
 *	present on the non-blocking file descriptor.
 */
/* RD_NODATA:
 *	This symbol holds the return code from read() when no data is present
 *	on the non-blocking file descriptor. Be careful! If EOF_NONBLOCK is
 *	not defined, then you can't distinguish between no data and EOF by
 *	issuing a read(). You'll have to find another way to tell for sure!
 */
/* EOF_NONBLOCK:
 *	This symbol, if defined, indicates to the C program that a read() on
 *	a non-blocking file descriptor will return 0 on EOF, and not the value
 *	held in RD_NODATA (-1 usually, in that case!).
 */
#define VAL_O_NONBLOCK O_NONBLOCK
#define VAL_EAGAIN EAGAIN
#define RD_NODATA -1
#define EOF_NONBLOCK

/* PTRSIZE:
 *	This symbol contains the size of a pointer, so that the C preprocessor
 *	can make decisions based on it.  It will be sizeof(void *) if
 *	the compiler supports (void *); otherwise it will be
 *	sizeof(char *).
 */
#define PTRSIZE 4		/**/

/* RANDBITS:
 *	This symbol contains the number of bits of random number the rand()
 *	function produces.  Usual values are 15, 16, and 31.
 */
#define RANDBITS 15		/**/

/* SSize_t:
 *	This symbol holds the type used by functions that return
 *	a count of bytes or an error condition.  It must be a signed type.
 *	It is usually ssize_t, but may be long or int, etc.
 *	It may be necessary to include <sys/types.h> or <unistd.h>
 *	to get any typedef'ed information.
 *	We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
 */
#define SSize_t int	 /* signed count of bytes */

/* OSNAME:
 *	This symbol contains the name of the operating system, as determined
 *	by Configure.  You shouldn't rely on it too much; the specific
 *	feature tests from Configure are generally more reliable.
 */
#define OSNAME "MSWin32"		/**/

/* CAT2:
 *	This macro catenates 2 tokens together.
 */
/* STRINGIFY:
 *	This macro surrounds its token with double quotes.
 */
#if 42 == 1
#define CAT2(a,b)a/**/b
#define STRINGIFY(a)"a"
		/* If you can get stringification with catify, tell me how! */
#endif
#if 42 == 42
#define CAT2(a,b)a ## b
#define StGiFy(a)# a
#define STRINGIFY(a)StGiFy(a)
#endif
#if 42 != 1 && 42 != 42
#include "Bletch: How does this C preprocessor catenate tokens?"
#endif

/* CSH:
 *	This symbol, if defined, contains the full pathname of csh.
 */
/*#define HAS_CSH		/**/
#ifdef HAS_CSH
#define CSH ""	/**/
#endif

/* HAS_ENDHOSTENT:
 *	This symbol, if defined, indicates that the endhostent() routine is
 *	available to close whatever was being used for host queries.
 */
/*#define HAS_ENDHOSTENT		/**/

/* HAS_ENDNETENT:
 *	This symbol, if defined, indicates that the endnetent() routine is
 *	available to close whatever was being used for network queries.
 */
/*#define HAS_ENDNETENT		/**/

/* HAS_ENDPROTOENT:
 *	This symbol, if defined, indicates that the endprotoent() routine is
 *	available to close whatever was being used for protocol queries.
 */
/*#define HAS_ENDPROTOENT		/**/

/* HAS_ENDSERVENT:
 *	This symbol, if defined, indicates that the endservent() routine is
 *	available to close whatever was being used for service queries.
 */
/*#define HAS_ENDSERVENT		/**/

/* HAS_GETHOSTBYADDR:
 *	This symbol, if defined, indicates that the gethostbyaddr() routine is
 *	available to look up hosts by their IP addresses.
 */
#define HAS_GETHOSTBYADDR		/**/

/* HAS_GETHOSTBYNAME:
 *	This symbol, if defined, indicates that the gethostbyname() routine is
 *	available to look up host names in some data base or other.
 */
#define HAS_GETHOSTBYNAME		/**/

/* HAS_GETHOSTENT:
 *	This symbol, if defined, indicates that the gethostent() routine is
 *	available to look up host names in some data base or another.
 */
/*#define HAS_GETHOSTENT		/**/

/* HAS_GETNETBYADDR:
 *	This symbol, if defined, indicates that the getnetbyaddr() routine is
 *	available to look up networks by their IP addresses.
 */
/*#define HAS_GETNETBYADDR		/**/

/* HAS_GETNETBYNAME:
 *	This symbol, if defined, indicates that the getnetbyname() routine is
 *	available to look up networks by their names.
 */
/*#define HAS_GETNETBYNAME		/**/

/* HAS_GETNETENT:
 *	This symbol, if defined, indicates that the getnetent() routine is
 *	available to look up network names in some data base or another.
 */
/*#define HAS_GETNETENT		/**/

/* HAS_GETPROTOENT:
 *	This symbol, if defined, indicates that the getprotoent() routine is
 *	available to look up protocols in some data base or another.
 */
/*#define HAS_GETPROTOENT		/**/

/* HAS_GETPROTOBYNAME:
 *	This symbol, if defined, indicates that the getprotobyname()
 *	routine is available to look up protocols by their name.
 */
/* HAS_GETPROTOBYNUMBER:
 *	This symbol, if defined, indicates that the getprotobynumber()
 *	routine is available to look up protocols by their number.
 */
#define HAS_GETPROTOBYNAME		/**/
#define HAS_GETPROTOBYNUMBER		/**/

/* HAS_GETSERVENT:
 *	This symbol, if defined, indicates that the getservent() routine is
 *	available to look up network services in some data base or another.
 */
/*#define HAS_GETSERVENT		/**/

/* HAS_GETSERVBYNAME:
 *	This symbol, if defined, indicates that the getservbyname()
 *	routine is available to look up services by their name.
 */
/* HAS_GETSERVBYPORT:
 *	This symbol, if defined, indicates that the getservbyport()
 *	routine is available to look up services by their port.
 */
#define HAS_GETSERVBYNAME		/**/
#define HAS_GETSERVBYPORT		/**/

/* HAS_LONG_DOUBLE:
 *	This symbol will be defined if the C compiler supports long
 *	doubles.
 */
/* LONG_DOUBLESIZE:
 *	This symbol contains the size of a long double, so that the 
 *	C preprocessor can make decisions based on it.  It is only
 *	defined if the system supports long doubles.
 */
#define HAS_LONG_DOUBLE		/**/
#ifdef HAS_LONG_DOUBLE
#define LONG_DOUBLESIZE 10		/**/
#endif

/* HAS_LONG_LONG:
 *	This symbol will be defined if the C compiler supports
 *	long long.
 */
/* LONGLONGSIZE:
 *	This symbol contains the size of a long long, so that the 
 *	C preprocessor can make decisions based on it.  It is only
 *	defined if the system supports long long.
 */
/*#define HAS_LONG_LONG		/**/
#ifdef HAS_LONG_LONG
#define LONGLONGSIZE 8		/**/
#endif

/* HAS_SETGROUPS:
 *	This symbol, if defined, indicates that the setgroups() routine is
 *	available to set the list of process groups.  If unavailable, multiple
 *	groups are probably not supported.
 */
/*#define HAS_SETGROUPS		/**/

/* HAS_SETHOSTENT:
 *	This symbol, if defined, indicates that the sethostent() routine is
 *	available.
 */
/*#define HAS_SETHOSTENT		/**/

/* HAS_SETNETENT:
 *	This symbol, if defined, indicates that the setnetent() routine is
 *	available.
 */
/*#define HAS_SETNETENT		/**/

/* HAS_SETPROTOENT:
 *	This symbol, if defined, indicates that the setprotoent() routine is
 *	available.
 */
/*#define HAS_SETPROTOENT		/**/

/* HAS_SETSERVENT:
 *	This symbol, if defined, indicates that the setservent() routine is
 *	available.
 */
/*#define HAS_SETSERVENT		/**/

/* HAS_SETVBUF:
 *	This symbol, if defined, indicates that the setvbuf routine is
 *	available to change buffering on an open stdio stream.
 *	to a line-buffered mode.
 */
#define HAS_SETVBUF		/**/

/* HAS_SOCKET:
 *	This symbol, if defined, indicates that the BSD socket interface is
 *	supported.
 */
/* HAS_SOCKETPAIR:
 *	This symbol, if defined, indicates that the BSD socketpair() call is
 *	supported.
 */
#define HAS_SOCKET		/**/
/*#define HAS_SOCKETPAIR	/**/

/* HAS_UNION_SEMUN:
 *	This symbol, if defined, indicates that the union semun is
 *	defined by including <sys/sem.h>.  If not, the user code
 *	probably needs to define it as:
 *	union semun {
 *	    int val;
 *	    struct semid_ds *buf;
 *	    unsigned short *array;
 *	}
 */
/* USE_SEMCTL_SEMUN:
 *	This symbol, if defined, indicates that union semun is
 *	used for semctl IPC_STAT.
 */
/* USE_SEMCTL_SEMID_DS:
 *	This symbol, if defined, indicates that struct semid_ds * is
 *	used for semctl IPC_STAT.
 */
#define HAS_UNION_SEMUN	/**/
/*#define USE_SEMCTL_SEMUN	/**/
/*#define USE_SEMCTL_SEMID_DS	/**/

/* Signal_t:
 *	This symbol's value is either "void" or "int", corresponding to the
 *	appropriate return type of a signal handler.  Thus, you can declare
 *	a signal handler using "Signal_t (*handler)()", and define the
 *	handler using "Signal_t handler(sig)".
 */
#define Signal_t void	/* Signal handler's return type */

/* Groups_t:
 *	This symbol holds the type used for the second argument to
 *	getgroups() and setgropus().  Usually, this is the same as