config.h

ARM上的如果你对底层感兴趣

/* Direntry_t:
 *	This symbol is set to 'struct direct' or 'struct dirent' depending on
 *	whether dirent is available or not. You should use this pseudo type to
 *	portably declare your directory entries.
 */
#define I_DIRENT		/**/
#define DIRNAMLEN	/**/
#define Direntry_t struct direct

/* I_DLFCN:
 *	This symbol, if defined, indicates that <dlfcn.h> exists and should
 *	be included.
 */
#define I_DLFCN		/**/

/* I_FCNTL:
 *	This manifest constant tells the C program to include <fcntl.h>.
 */
#define I_FCNTL	/**/

/* I_FLOAT:
 *	This symbol, if defined, indicates to the C program that it should
 *	include <float.h> to get definition of symbols like DBL_MAX or
 *	DBL_MIN, i.e. machine dependent floating point values.
 */
#define I_FLOAT		/**/

/* I_GRP:
 *	This symbol, if defined, indicates to the C program that it should
 *	include <grp.h>.
 */
/* GRPASSWD:
 *	This symbol, if defined, indicates to the C program that struct group
 *	contains gr_passwd.
 */
/* HAS_SETGRENT:
 *	This symbol, if defined, indicates that the getgrent routine is
 *	available for initializing sequential access of the group database.
 */
/* HAS_GETGRENT:
 *	This symbol, if defined, indicates that the getgrent routine is
 *	available for sequential access of the group database.
 */
/* HAS_ENDGRENT:
 *	This symbol, if defined, indicates that the getgrent routine is
 *	available for finalizing sequential access of the group database.
 */
/*#define I_GRP		/**/
/*#define GRPASSWD	/**/
/*#define HAS_SETGRENT	/**/
/*#define HAS_GETGRENT	/**/
/*#define HAS_ENDGRENT	/**/

/* I_LIMITS:
 *	This symbol, if defined, indicates to the C program that it should
 *	include <limits.h> to get definition of symbols like WORD_BIT or
 *	LONG_MAX, i.e. machine dependant limitations.
 */
#define I_LIMITS		/**/

/* I_LOCALE:
 *	This symbol, if defined, indicates to the C program that it should
 *	include <locale.h>.
 */
#define	I_LOCALE		/**/

/* I_MATH:
 *	This symbol, if defined, indicates to the C program that it should
 *	include <math.h>.
 */
#define I_MATH		/**/

/* I_MEMORY:
 *	This symbol, if defined, indicates to the C program that it should
 *	include <memory.h>.
 */
/*#define I_MEMORY		/**/

/* I_NDBM:
 *	This symbol, if defined, indicates that <ndbm.h> exists and should
 *	be included.
 */
/*#define I_NDBM	/**/

/* I_NET_ERRNO:
 *	This symbol, if defined, indicates that <net/errno.h> exists and 
 *	should be included.
 */
/*#define I_NET_ERRNO		/**/

/* I_NETINET_IN:
 *	This symbol, if defined, indicates to the C program that it should
 *	include <netinet/in.h>. Otherwise, you may try <sys/in.h>.
 */
/*#define I_NETINET_IN	/**/

/* I_SFIO:
 *	This symbol, if defined, indicates to the C program that it should
 *	include <sfio.h>.
 */
/*#define	I_SFIO		/**/

/* I_STDDEF:
 *	This symbol, if defined, indicates that <stddef.h> exists and should
 *	be included.
 */
#define I_STDDEF	/**/

/* I_STDLIB:
 *	This symbol, if defined, indicates that <stdlib.h> exists and should
 *	be included.
 */
#define I_STDLIB		/**/

/* I_STRING:
 *	This symbol, if defined, indicates to the C program that it should
 *	include <string.h> (USG systems) instead of <strings.h> (BSD systems).
 */
#define I_STRING		/**/

/* I_SYS_DIR:
 *	This symbol, if defined, indicates to the C program that it should
 *	include <sys/dir.h>.
 */
/*#define I_SYS_DIR		/**/

/* I_SYS_FILE:
 *	This symbol, if defined, indicates to the C program that it should
 *	include <sys/file.h> to get definition of R_OK and friends.
 */
/*#define I_SYS_FILE		/**/

/* I_SYS_IOCTL:
 *	This symbol, if defined, indicates that <sys/ioctl.h> exists and should
 *	be included. Otherwise, include <sgtty.h> or <termio.h>.
 */
/*#define	I_SYS_IOCTL		/**/

/* I_SYS_NDIR:
 *	This symbol, if defined, indicates to the C program that it should
 *	include <sys/ndir.h>.
 */
/*#define I_SYS_NDIR	/**/

/* I_SYS_PARAM:
 *	This symbol, if defined, indicates to the C program that it should
 *	include <sys/param.h>.
 */
/*#define I_SYS_PARAM		/**/

/* I_SYS_RESOURCE:
 *	This symbol, if defined, indicates to the C program that it should
 *	include <sys/resource.h>.
 */
/*#define I_SYS_RESOURCE		/**/

/* I_SYS_SELECT:
 *	This symbol, if defined, indicates to the C program that it should
 *	include <sys/select.h> in order to get definition of struct timeval.
 */
/*#define I_SYS_SELECT	/**/

/* I_SYS_STAT:
 *	This symbol, if defined, indicates to the C program that it should
 *	include <sys/stat.h>.
 */
#define	I_SYS_STAT		/**/

/* I_SYS_TIMES:
 *	This symbol, if defined, indicates to the C program that it should
 *	include <sys/times.h>.
 */
/*#define	I_SYS_TIMES		/**/

/* I_SYS_TYPES:
 *	This symbol, if defined, indicates to the C program that it should
 *	include <sys/types.h>.
 */
#define	I_SYS_TYPES		/**/

/* I_SYS_UN:
 *	This symbol, if defined, indicates to the C program that it should
 *	include <sys/un.h> to get UNIX domain socket definitions.
 */
/*#define I_SYS_UN		/**/

/* I_SYS_WAIT:
 *	This symbol, if defined, indicates to the C program that it should
 *	include <sys/wait.h>.
 */
/*#define I_SYS_WAIT	/**/

/* I_TERMIO:
 *	This symbol, if defined, indicates that the program should include
 *	<termio.h> rather than <sgtty.h>.  There are also differences in
 *	the ioctl() calls that depend on the value of this symbol.
 */
/* I_TERMIOS:
 *	This symbol, if defined, indicates that the program should include
 *	the POSIX termios.h rather than sgtty.h or termio.h.
 *	There are also differences in the ioctl() calls that depend on the
 *	value of this symbol.
 */
/* I_SGTTY:
 *	This symbol, if defined, indicates that the program should include
 *	<sgtty.h> rather than <termio.h>.  There are also differences in
 *	the ioctl() calls that depend on the value of this symbol.
 */
/*#define I_TERMIO		/**/
/*#define I_TERMIOS		/**/
/*#define I_SGTTY		/**/

/* I_UNISTD:
 *	This symbol, if defined, indicates to the C program that it should
 *	include <unistd.h>.
 */
/*#define I_UNISTD		/**/

/* I_UTIME:
 *	This symbol, if defined, indicates to the C program that it should
 *	include <utime.h>.
 */
#define I_UTIME		/**/

/* I_VALUES:
 *	This symbol, if defined, indicates to the C program that it should
 *	include <values.h> to get definition of symbols like MINFLOAT or
 *	MAXLONG, i.e. machine dependant limitations.  Probably, you
 *	should use <limits.h> instead, if it is available.
 */
/*#define I_VALUES		/**/

/* I_STDARG:
 *	This symbol, if defined, indicates that <stdarg.h> exists and should
 *	be included.
 */
/* I_VARARGS:
 *	This symbol, if defined, indicates to the C program that it should
 *	include <varargs.h>.
 */
#define I_STDARG		/**/
/*#define I_VARARGS	/**/

/* I_VFORK:
 *	This symbol, if defined, indicates to the C program that it should
 *	include vfork.h.
 */
/*#define I_VFORK	/**/

/* CAN_PROTOTYPE:
 *	If defined, this macro indicates that the C compiler can handle
 *	function prototypes.
 */
/* _:
 *	This macro is used to declare function parameters for folks who want
 *	to make declarations with prototypes using a different style than
 *	the above macros.  Use double parentheses.  For example:
 *
 *		int main _((int argc, char *argv[]));
 */
#define	CAN_PROTOTYPE	/**/
#ifdef CAN_PROTOTYPE
#define	_(args) args
#else
#define	_(args) ()
#endif

/* SH_PATH:
 *	This symbol contains the full pathname to the shell used on this
 *	on this system to execute Bourne shell scripts.  Usually, this will be
 *	/bin/sh, though it's possible that some systems will have /bin/ksh,
 *	/bin/pdksh, /bin/ash, /bin/bash, or even something such as
 *	D:/bin/sh.exe.
 */
#define SH_PATH "cmd /x /c"  /**/

/* STDCHAR:
 *	This symbol is defined to be the type of char used in stdio.h.
 *	It has the values "unsigned char" or "char".
 */
#define STDCHAR char	/**/

/* MEM_ALIGNBYTES:
 *	 This symbol contains the number of bytes required to align a
 *	 double. Usual values are 2, 4 and 8.
 *	 On NeXT starting with 3.2, you can build "Fat" Multiple Architecture
 *	 Binaries (MAB) for targets with varying alignment.  This only matters
 *	 for perl, where the config.h can be generated and installed on one
 *	 system, and used by a different architecture to build an extension.
 *	 The default is eight, for safety.
 */
#define MEM_ALIGNBYTES 8	/**/

/* BYTEORDER:
 *	This symbol holds the hexadecimal constant defined in byteorder,
 *	i.e. 0x1234 or 0x4321, etc...
 *	On NeXT 3.2 (and greater), you can build "Fat" Multiple Architecture
 *	Binaries (MAB) on either big endian or little endian machines.
 *	The endian-ness is available at compile-time.  This only matters
 *	for perl, where the config.h can be generated and installed on 
 *	one system, and used by a different architecture to build an
 *	extension.  Older versions of NeXT that might not have
 *	defined either *_ENDIAN__ were all on Motorola 680x0 series,
 *	so the default case (for NeXT) is big endian to catch them. 
 *	This might matter for NeXT 3.0.
 */
#ifndef NeXT
#define BYTEORDER 0x1234	/* large digits for MSB */
#else  /* NeXT */
#ifdef __LITTLE_ENDIAN__
#define BYTEORDER 0x1234
#else /* __BIG_ENDIAN__ */
#define BYTEORDER 0x4321
#endif /* ENDIAN CHECK */
#endif /* NeXT */

/* CASTI32:
 *	This symbol is defined if the C compiler can cast negative
 *	or large floating point numbers to 32-bit ints.
 */
#define	CASTI32		/**/

/* CASTNEGFLOAT:
 *	This symbol is defined if the C compiler can cast negative
 *	numbers to unsigned longs, ints and shorts.
 */
/* CASTFLAGS:
 *	This symbol contains flags that say what difficulties the compiler
 *	has casting odd floating values to unsigned long:
 *		0 = ok
 *		1 = couldn't cast < 0
 *		2 = couldn't cast >= 0x80000000
 *		4 = couldn't cast in argument expression list
 */
#define	CASTNEGFLOAT		/**/
#define CASTFLAGS 0		/**/

/* VOID_CLOSEDIR:
 *	This symbol, if defined, indicates that the closedir() routine
 *	does not return a value.
 */
/*#define VOID_CLOSEDIR		/**/

/* Gconvert:
 *	This preprocessor macro is defined to convert a floating point
 *	number to a string without a trailing decimal point.  This
 *	emulates the behavior of sprintf("%g"), but is sometimes much more
 *	efficient.  If gconvert() is not available, but gcvt() drops the
 *	trailing decimal point, then gcvt() is used.  If all else fails,
 *	a macro using sprintf("%g") is used. Arguments for the Gconvert
 *	macro are: value, number of digits, whether trailing zeros should
 *	be retained, and the output buffer.
 *	Possible values are:
 *		d_Gconvert='gconvert((x),(n),(t),(b))'
 *		d_Gconvert='gcvt((x),(n),(b))'
 *		d_Gconvert='sprintf((b),"%.*g",(n),(x))'
 *	The last two assume trailing zeros should not be kept.
 */
#define Gconvert(x,n,t,b) sprintf((b),"%.*g",(n),(x))

/* HAS_GNULIBC:
 *	This symbol, if defined, indicates to the C program that 
 *	the GNU C library is being used.
 */
/*#define HAS_GNULIBC  	/**/
/* HAS_ISASCII:
 *	This manifest constant lets the C program know that isascii 
 *	is available.
 */
#define HAS_ISASCII		/**/

/* HAS_LCHOWN:
 *	This symbol, if defined, indicates that the lchown routine is
 *	available to operate on a symbolic link (instead of following the
 *	link).
 */
/*#define HAS_LCHOWN		/**/

/* HAS_OPEN3:
 *	This manifest constant lets the C program know that the three
 *	argument form of open(2) is available.
 */
/*#define HAS_OPEN3		/**/

/* HAS_SAFE_BCOPY:
 *	This symbol, if defined, indicates that the bcopy routine is available
 *	to copy potentially overlapping memory blocks. Otherwise you should
 *	probably use memmove() or memcpy(). If neither is defined, roll your
 *	own version.
 */
/*#define HAS_SAFE_BCOPY	/**/

/* HAS_SAFE_MEMCPY:
 *	This symbol, if defined, indicates that the memcpy routine is available
 *	to copy potentially overlapping memory blocks. Otherwise you should
 *	probably use memmove() or memcpy(). If neither is defined, roll your
 *	own version.
 */
/*#define HAS_SAFE_MEMCPY	/**/

/* HAS_SANE_MEMCMP:
 *	This symbol, if defined, indicates that the memcmp routine is available
 *	and can be used to compare relative magnitudes of chars with their high
 *	bits set.  If it is not defined, roll your own version.
 */
#define HAS_SANE_MEMCMP	/**/

/* HAS_SIGACTION:
 *	This symbol, if defined, indicates that Vr4's sigaction() routine
 *	is available.
 */
/*#define HAS_SIGACTION	/**/

/* Sigjmp_buf:
 *	This is the buffer type to be used with Sigsetjmp and Siglongjmp.
 */
/* Sigsetjmp:
 *	This macro is used in the same way as sigsetjmp(), but will invoke
 *	traditional setjmp() if sigsetjmp isn't available.