Put feature macro configuration stuff in a separate file

1 files changed, 1 insertions, 144 deletions

diff --git a/configure.ac b/configure.ac
index bf0e892d..de645fb1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -21,150 +21,7 @@ if test -z "$ac_ct_AR"; then
     AC_MSG_ERROR(cannot find ar)
 fi
 
-dnl ===========================================================================
-dnl Feature macro stuff borrowed from Python's configure.in
-
-# 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
-
-dnl End of feature macro stuff borrowed from Python's configure.in
-dnl ===========================================================================
+m4_include(m4/feature_macros.m4)
 
 # If GCC, turn on warnings.
 if test "x$GCC" = "xyes"; then