minix/sys/sys/featuretest.h
Lionel Sambuc 84d9c625bf Synchronize on NetBSD-CVS (2013/12/1 12:00:00 UTC)
- Fix for possible unset uid/gid in toproto
 - Fix for default mtree style
 - Update libelf
 - Importing libexecinfo
 - Resynchronize GCC, mpc, gmp, mpfr
 - build.sh: Replace params with show-params.
     This has been done as the make target has been renamed in the same
     way, while a new target named params has been added. This new
     target generates a file containing all the parameters, instead of
     printing it on the console.
 - Update test48 with new etc/services (Fix by Ben Gras <ben@minix3.org)
     get getservbyport() out of the inner loop

Change-Id: Ie6ad5226fa2621ff9f0dee8782ea48f9443d2091
2014-07-28 17:05:06 +02:00

86 lines
3.1 KiB
C

/* $NetBSD: featuretest.h,v 1.10 2013/04/26 18:29:06 christos Exp $ */
/*
* Written by Klaus Klein <kleink@NetBSD.org>, February 2, 1998.
* Public domain.
*
* NOTE: Do not protect this header against multiple inclusion. Doing
* so can have subtle side-effects due to header file inclusion order
* and testing of e.g. _POSIX_SOURCE vs. _POSIX_C_SOURCE. Instead,
* protect each CPP macro that we want to supply.
*/
/*
* Feature-test macros are defined by several standards, and allow an
* application to specify what symbols they want the system headers to
* expose, and hence what standard they want them to conform to.
* There are two classes of feature-test macros. The first class
* specify complete standards, and if one of these is defined, header
* files will try to conform to the relevant standard. They are:
*
* ANSI macros:
* _ANSI_SOURCE ANSI C89
*
* POSIX macros:
* _POSIX_SOURCE == 1 IEEE Std 1003.1 (version?)
* _POSIX_C_SOURCE == 1 IEEE Std 1003.1-1990
* _POSIX_C_SOURCE == 2 IEEE Std 1003.2-1992
* _POSIX_C_SOURCE == 199309L IEEE Std 1003.1b-1993
* _POSIX_C_SOURCE == 199506L ISO/IEC 9945-1:1996
* _POSIX_C_SOURCE == 200112L IEEE Std 1003.1-2001
* _POSIX_C_SOURCE == 200809L IEEE Std 1003.1-2008
*
* X/Open macros:
* _XOPEN_SOURCE System Interfaces and Headers, Issue 4, Ver 2
* _XOPEN_SOURCE_EXTENDED == 1 XSH4.2 UNIX extensions
* _XOPEN_SOURCE == 500 System Interfaces and Headers, Issue 5
* _XOPEN_SOURCE == 520 Networking Services (XNS), Issue 5.2
* _XOPEN_SOURCE == 600 IEEE Std 1003.1-2001, XSI option
* _XOPEN_SOURCE == 700 IEEE Std 1003.1-2008, XSI option
*
* NetBSD macros:
* _NETBSD_SOURCE == 1 Make all NetBSD features available.
*
* If more than one of these "major" feature-test macros is defined,
* then the set of facilities provided (and namespace used) is the
* union of that specified by the relevant standards, and in case of
* conflict, the earlier standard in the above list has precedence (so
* if both _POSIX_C_SOURCE and _NETBSD_SOURCE are defined, the version
* of rename() that's used is the POSIX one). If none of the "major"
* feature-test macros is defined, _NETBSD_SOURCE is assumed.
*
* There are also "minor" feature-test macros, which enable extra
* functionality in addition to some base standard. They should be
* defined along with one of the "major" macros. The "minor" macros
* are:
*
* _REENTRANT
* _ISOC99_SOURCE
* _ISOC11_SOURCE
* _LARGEFILE_SOURCE Large File Support
* <http://ftp.sas.com/standards/large.file/x_open.20Mar96.html>
*/
#if defined(_POSIX_SOURCE) && !defined(_POSIX_C_SOURCE)
#define _POSIX_C_SOURCE 1L
#endif
#if !defined(_ANSI_SOURCE) && !defined(_POSIX_C_SOURCE) && \
!defined(_XOPEN_SOURCE) && !defined(_NETBSD_SOURCE)
#define _NETBSD_SOURCE 1
#endif
/* Compatibility for older version of autotools. */
#if defined(_MINIX)
#undef _MINIX
#define _NETBSD_SOURCE 1
#endif /* defined(__minix) */
/* Never define _REENTRANT on Minix */
#if !defined(__minix)
#if ((_POSIX_C_SOURCE - 0) >= 199506L || (_XOPEN_SOURCE - 0) >= 500) && \
!defined(_REENTRANT)
#define _REENTRANT
#endif /* !defined(__minix) */
#endif