2fe8fb192f
There is important information about booting non-ack images in docs/UPDATING. ack/aout-format images can't be built any more, and booting clang/ELF-format ones is a little different. Updating to the new boot monitor is recommended. Changes in this commit: . drop boot monitor -> allowing dropping ack support . facility to copy ELF boot files to /boot so that old boot monitor can still boot fairly easily, see UPDATING . no more ack-format libraries -> single-case libraries . some cleanup of OBJECT_FMT, COMPILER_TYPE, etc cases . drop several ack toolchain commands, but not all support commands (e.g. aal is gone but acksize is not yet). . a few libc files moved to netbsd libc dir . new /bin/date as minix date used code in libc/ . test compile fix . harmonize includes . /usr/lib is no longer special: without ack, /usr/lib plays no kind of special bootstrapping role any more and bootstrapping is done exclusively through packages, so releases depend even less on the state of the machine making them now. . rename nbsd_lib* to lib* . reduce mtree
82 lines
2.9 KiB
C
82 lines
2.9 KiB
C
/* $NetBSD: featuretest.h,v 1.9 2009/05/04 16:44:14 ginsbach Exp $ */
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/*
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* Written by Klaus Klein <kleink@NetBSD.org>, February 2, 1998.
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* Public domain.
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*
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* NOTE: Do not protect this header against multiple inclusion. Doing
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* so can have subtle side-effects due to header file inclusion order
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* and testing of e.g. _POSIX_SOURCE vs. _POSIX_C_SOURCE. Instead,
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* protect each CPP macro that we want to supply.
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*/
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/*
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* Feature-test macros are defined by several standards, and allow an
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* application to specify what symbols they want the system headers to
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* expose, and hence what standard they want them to conform to.
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* There are two classes of feature-test macros. The first class
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* specify complete standards, and if one of these is defined, header
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* files will try to conform to the relevant standard. They are:
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*
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* ANSI macros:
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* _ANSI_SOURCE ANSI C89
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*
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* POSIX macros:
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* _POSIX_SOURCE == 1 IEEE Std 1003.1 (version?)
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* _POSIX_C_SOURCE == 1 IEEE Std 1003.1-1990
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* _POSIX_C_SOURCE == 2 IEEE Std 1003.2-1992
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* _POSIX_C_SOURCE == 199309L IEEE Std 1003.1b-1993
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* _POSIX_C_SOURCE == 199506L ISO/IEC 9945-1:1996
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* _POSIX_C_SOURCE == 200112L IEEE Std 1003.1-2001
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* _POSIX_C_SOURCE == 200809L IEEE Std 1003.1-2008
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*
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* X/Open macros:
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* _XOPEN_SOURCE System Interfaces and Headers, Issue 4, Ver 2
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* _XOPEN_SOURCE_EXTENDED == 1 XSH4.2 UNIX extensions
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* _XOPEN_SOURCE == 500 System Interfaces and Headers, Issue 5
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* _XOPEN_SOURCE == 520 Networking Services (XNS), Issue 5.2
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* _XOPEN_SOURCE == 600 IEEE Std 1003.1-2001, XSI option
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* _XOPEN_SOURCE == 700 IEEE Std 1003.1-2008, XSI option
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*
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* NetBSD macros:
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* _NETBSD_SOURCE == 1 Make all NetBSD features available.
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*
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* If more than one of these "major" feature-test macros is defined,
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* then the set of facilities provided (and namespace used) is the
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* union of that specified by the relevant standards, and in case of
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* conflict, the earlier standard in the above list has precedence (so
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* if both _POSIX_C_SOURCE and _NETBSD_SOURCE are defined, the version
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* of rename() that's used is the POSIX one). If none of the "major"
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* feature-test macros is defined, _NETBSD_SOURCE is assumed.
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*
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* There are also "minor" feature-test macros, which enable extra
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* functionality in addition to some base standard. They should be
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* defined along with one of the "major" macros. The "minor" macros
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* are:
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*
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* _REENTRANT
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* _ISOC99_SOURCE
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* _LARGEFILE_SOURCE Large File Support
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* <http://ftp.sas.com/standards/large.file/x_open.20Mar96.html>
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*/
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#if defined(_POSIX_SOURCE) && !defined(_POSIX_C_SOURCE)
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#define _POSIX_C_SOURCE 1L
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#endif
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#if !defined(_ANSI_SOURCE) && !defined(_POSIX_C_SOURCE) && \
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!defined(_XOPEN_SOURCE) && !defined(_NETBSD_SOURCE)
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#define _NETBSD_SOURCE 1
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#endif
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/* Never define _REENTRANT on Minix */
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#ifdef __minix
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#if ((_POSIX_C_SOURCE - 0) >= 199506L || (_XOPEN_SOURCE - 0) >= 500) && \
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!defined(_REENTRANT)
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#define _REENTRANT
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#endif
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#endif /* __minix */
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