ccache/m4/feature_macros.m4
Joel Rosdahl 4aaa6a151d General overhaul of license and copyright information
The GPL license text is now located in GPLv3.txt. LICENSE.txt contains licenses
and copyright information for all bundled files from other sources and
AUTHORS.txt lists all contributors (taken from "git log").

At the same time, manual.txt was renamed to MANUAL.txt for consistency reasons.
2010-08-02 13:07:42 +02:00

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dnl ===========================================================================
dnl Feature macro stuff borrowed from Python's configure.in
dnl
dnl For license information, see
dnl <http://www.python.org/download/releases/2.6.2/license/>.
dnl ===========================================================================
# The later defininition of _XOPEN_SOURCE disables certain features
# on Linux, so we need _GNU_SOURCE to re-enable them (makedev, tm_zone).
AC_DEFINE(_GNU_SOURCE, 1, [Define on Linux to activate all library features])
# The later defininition of _XOPEN_SOURCE and _POSIX_C_SOURCE disables
# certain features on NetBSD, so we need _NETBSD_SOURCE to re-enable
# them.
AC_DEFINE(_NETBSD_SOURCE, 1, [Define on NetBSD to activate all library features])
# The later defininition of _XOPEN_SOURCE and _POSIX_C_SOURCE disables
# certain features on FreeBSD, so we need __BSD_VISIBLE to re-enable
# them.
AC_DEFINE(__BSD_VISIBLE, 1, [Define on FreeBSD to activate all library features])
# The later defininition of _XOPEN_SOURCE and _POSIX_C_SOURCE disables
# u_int on Irix 5.3. Defining _BSD_TYPES brings it back.
AC_DEFINE(_BSD_TYPES, 1, [Define on Irix to enable u_int])
# The later defininition of _XOPEN_SOURCE and _POSIX_C_SOURCE disables
# certain features on Mac OS X, so we need _DARWIN_C_SOURCE to re-enable
# them.
AC_DEFINE(_DARWIN_C_SOURCE, 1, [Define on Darwin to activate all library features])
define_xopen_source=yes
ac_sys_system=`uname -s`
if test "$ac_sys_system" = "AIX" -o "$ac_sys_system" = "Monterey64" \
-o "$ac_sys_system" = "UnixWare" -o "$ac_sys_system" = "OpenUNIX"; then
ac_sys_release=`uname -v`
else
ac_sys_release=`uname -r`
fi
# Some systems cannot stand _XOPEN_SOURCE being defined at all; they
# disable features if it is defined, without any means to access these
# features as extensions. For these systems, we skip the definition of
# _XOPEN_SOURCE. Before adding a system to the list to gain access to
# some feature, make sure there is no alternative way to access this
# feature. Also, when using wildcards, make sure you have verified the
# need for not defining _XOPEN_SOURCE on all systems matching the
# wildcard, and that the wildcard does not include future systems
# (which may remove their limitations).
dnl quadrigraphs "@<:@" and "@:>@" produce "[" and "]" in the output
case $ac_sys_system/$ac_sys_release in
# On OpenBSD, select(2) is not available if _XOPEN_SOURCE is defined,
# even though select is a POSIX function. Reported by J. Ribbens.
# Reconfirmed for OpenBSD 3.3 by Zachary Hamm, for 3.4 by Jason Ish.
OpenBSD/2.* | OpenBSD/3.@<:@0123456789@:>@ | OpenBSD/4.@<:@0123@:>@)
define_xopen_source=no
# OpenBSD undoes our definition of __BSD_VISIBLE if _XOPEN_SOURCE is
# also defined. This can be overridden by defining _BSD_SOURCE
# As this has a different meaning on Linux, only define it on OpenBSD
AC_DEFINE(_BSD_SOURCE, 1, [Define on OpenBSD to activate all library features])
;;
# Defining _XOPEN_SOURCE on NetBSD version prior to the introduction of
# _NETBSD_SOURCE disables certain features (eg. setgroups). Reported by
# Marc Recht
NetBSD/1.5 | NetBSD/1.5.* | NetBSD/1.6 | NetBSD/1.6.* | NetBSD/1.6@<:@A-S@:>@)
define_xopen_source=no;;
# On Solaris 2.6, sys/wait.h is inconsistent in the usage
# of union __?sigval. Reported by Stuart Bishop.
SunOS/5.6)
define_xopen_source=no;;
# On UnixWare 7, u_long is never defined with _XOPEN_SOURCE,
# but used in /usr/include/netinet/tcp.h. Reported by Tim Rice.
# Reconfirmed for 7.1.4 by Martin v. Loewis.
OpenUNIX/8.0.0| UnixWare/7.1.@<:@0-4@:>@)
define_xopen_source=no;;
# On OpenServer 5, u_short is never defined with _XOPEN_SOURCE,
# but used in struct sockaddr.sa_family. Reported by Tim Rice.
SCO_SV/3.2)
define_xopen_source=no;;
# On FreeBSD 4, the math functions C89 does not cover are never defined
# with _XOPEN_SOURCE and __BSD_VISIBLE does not re-enable them.
FreeBSD/4.*)
define_xopen_source=no;;
# On MacOS X 10.2, a bug in ncurses.h means that it craps out if
# _XOPEN_EXTENDED_SOURCE is defined. Apparently, this is fixed in 10.3, which
# identifies itself as Darwin/7.*
# On Mac OS X 10.4, defining _POSIX_C_SOURCE or _XOPEN_SOURCE
# disables platform specific features beyond repair.
# On Mac OS X 10.3, defining _POSIX_C_SOURCE or _XOPEN_SOURCE
# has no effect, don't bother defining them
Darwin/@<:@6789@:>@.*)
define_xopen_source=no;;
# On AIX 4 and 5.1, mbstate_t is defined only when _XOPEN_SOURCE == 500 but
# used in wcsnrtombs() and mbsnrtowcs() even if _XOPEN_SOURCE is not defined
# or has another value. By not (re)defining it, the defaults come in place.
AIX/4)
define_xopen_source=no;;
AIX/5)
if test `uname -r` -eq 1; then
define_xopen_source=no
fi
;;
# On QNX 6.3.2, defining _XOPEN_SOURCE prevents netdb.h from
# defining NI_NUMERICHOST.
QNX/6.3.2)
define_xopen_source=no
;;
esac
if test $define_xopen_source = yes
then
# On Solaris w/ g++ it appears that _XOPEN_SOURCE has to be
# defined precisely as g++ defines it
# Furthermore, on Solaris 10, XPG6 requires the use of a C99
# compiler
case $ac_sys_system/$ac_sys_release in
SunOS/5.8|SunOS/5.9|SunOS/5.10)
AC_DEFINE(_XOPEN_SOURCE, 500,
Define to the level of X/Open that your system supports)
;;
*)
AC_DEFINE(_XOPEN_SOURCE, 600,
Define to the level of X/Open that your system supports)
;;
esac
# On Tru64 Unix 4.0F, defining _XOPEN_SOURCE also requires
# definition of _XOPEN_SOURCE_EXTENDED and _POSIX_C_SOURCE, or else
# several APIs are not declared. Since this is also needed in some
# cases for HP-UX, we define it globally.
# except for Solaris 10, where it must not be defined,
# as it implies XPG4.2
case $ac_sys_system/$ac_sys_release in
SunOS/5.10)
;;
*)
AC_DEFINE(_XOPEN_SOURCE_EXTENDED, 1,
Define to activate Unix95-and-earlier features)
;;
esac
AC_DEFINE(_POSIX_C_SOURCE, 200112L, Define to activate features from IEEE Stds 1003.1-2001)
fi