diff options
Diffstat (limited to 'm4/feature_macros.m4')
| -rw-r--r-- | m4/feature_macros.m4 | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/m4/feature_macros.m4 b/m4/feature_macros.m4 new file mode 100644 index 0000000..0243e9f --- /dev/null +++ b/m4/feature_macros.m4 @@ -0,0 +1,147 @@ +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|AIX/7) + 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|SunOS/5.11) + AC_DEFINE(__EXTENSIONS__, 1, + Define to activate Unix95-and-earlier features) + ;; + *) + 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 |