- rename configure.in to configure.ac

- change references from configure.in to configure.ac

1 files changed, 4158 insertions, 0 deletions

diff --git a/configure.ac b/configure.ac
new file mode 100644
index 0000000..9b7a5a7
--- /dev/null
+++ b/configure.ac
@@ -0,0 +1,4158 @@
+dnl ***********************************************
+dnl * Please run autoreconf to test your changes! *
+dnl ***********************************************
+dnl NOTE: autoconf 2.64 doesn't seem to work (use 2.61).
+
+# Set VERSION so we only need to edit in one place (i.e., here)
+m4_define(PYTHON_VERSION, 3.1)
+
+AC_REVISION($Revision$)
+AC_PREREQ(2.61)
+AC_INIT(python, PYTHON_VERSION, http://bugs.python.org/)
+AC_CONFIG_SRCDIR([Include/object.h])
+AC_CONFIG_HEADER(pyconfig.h)
+
+dnl Ensure that if prefix is specified, it does not end in a slash. If
+dnl it does, we get path names containing '//' which is both ugly and
+dnl can cause trouble.
+
+dnl Last slash shouldn't be stripped if prefix=/
+if test "$prefix" != "/"; then
+    prefix=`echo "$prefix" | sed -e 's/\/$//g'`
+fi    
+
+dnl This is for stuff that absolutely must end up in pyconfig.h.
+dnl Please use pyport.h instead, if possible.
+AH_TOP([
+#ifndef Py_PYCONFIG_H
+#define Py_PYCONFIG_H
+])
+AH_BOTTOM([
+/* Define the macros needed if on a UnixWare 7.x system. */
+#if defined(__USLC__) && defined(__SCO_VERSION__)
+#define STRICT_SYSV_CURSES /* Don't use ncurses extensions */
+#endif
+
+#endif /*Py_PYCONFIG_H*/
+])
+
+# We don't use PACKAGE_ variables, and they cause conflicts
+# with other autoconf-based packages that include Python.h
+grep -v 'define PACKAGE_' <confdefs.h >confdefs.h.new
+rm confdefs.h
+mv confdefs.h.new confdefs.h
+
+AC_SUBST(VERSION)
+VERSION=PYTHON_VERSION
+
+AC_SUBST(SOVERSION)
+SOVERSION=1.0
+
+# The later defininition of _XOPEN_SOURCE disables certain features
+# on Linux, so we need _GNU_SOURCE to re-enable them (makedev, tm_zone).
+AC_DEFINE(_GNU_SOURCE, 1, [Define on Linux to activate all library features])
+
+# The later defininition of _XOPEN_SOURCE and _POSIX_C_SOURCE disables
+# certain features on NetBSD, so we need _NETBSD_SOURCE to re-enable
+# them.
+AC_DEFINE(_NETBSD_SOURCE, 1, [Define on NetBSD to activate all library features])
+
+# The later defininition of _XOPEN_SOURCE and _POSIX_C_SOURCE disables
+# certain features on FreeBSD, so we need __BSD_VISIBLE to re-enable
+# them.
+AC_DEFINE(__BSD_VISIBLE, 1, [Define on FreeBSD to activate all library features])
+
+# The later defininition of _XOPEN_SOURCE and _POSIX_C_SOURCE disables
+# u_int on Irix 5.3. Defining _BSD_TYPES brings it back.
+AC_DEFINE(_BSD_TYPES, 1, [Define on Irix to enable u_int])
+
+# The later defininition of _XOPEN_SOURCE and _POSIX_C_SOURCE disables
+# certain features on Mac OS X, so we need _DARWIN_C_SOURCE to re-enable
+# them.
+AC_DEFINE(_DARWIN_C_SOURCE, 1, [Define on Darwin to activate all library features])
+
+
+define_xopen_source=yes
+
+# Arguments passed to configure.
+AC_SUBST(CONFIG_ARGS)
+CONFIG_ARGS="$ac_configure_args"
+
+AC_MSG_CHECKING([for --enable-universalsdk])
+AC_ARG_ENABLE(universalsdk,
+	AC_HELP_STRING(--enable-universalsdk@<:@=SDKDIR@:>@, Build against Mac OS X 10.4u SDK (ppc/i386)),
+[
+	case $enableval in
+	yes)
+		enableval=/Developer/SDKs/MacOSX10.4u.sdk
+		if test ! -d "${enableval}"
+		then
+			enableval=/
+		fi
+		;;
+	esac
+	case $enableval in
+	no)
+		UNIVERSALSDK=
+		enable_universalsdk=
+		;;
+	*)
+		UNIVERSALSDK=$enableval
+		if test ! -d "${UNIVERSALSDK}"
+		then
+			AC_MSG_ERROR([--enable-universalsdk specifies non-existing SDK: ${UNIVERSALSDK}])
+		fi
+		;;
+	esac
+	
+],[
+   	UNIVERSALSDK=
+	enable_universalsdk=
+])
+if test -n "${UNIVERSALSDK}"
+then
+	AC_MSG_RESULT(${UNIVERSALSDK})
+else
+	AC_MSG_RESULT(no)
+fi
+AC_SUBST(UNIVERSALSDK)
+
+AC_SUBST(ARCH_RUN_32BIT)
+
+UNIVERSAL_ARCHS="32-bit"
+AC_SUBST(LIPO_32BIT_FLAGS)
+AC_SUBST(LIPO_64BIT_FLAGS)
+AC_MSG_CHECKING(for --with-universal-archs)
+AC_ARG_WITH(universal-archs,
+    AC_HELP_STRING(--with-universal-archs=ARCH, select architectures for universal build ("32-bit", "64-bit", "3-way", "intel" or "all")),
+[
+	AC_MSG_RESULT($withval)
+	UNIVERSAL_ARCHS="$withval"
+],
+[
+ 	AC_MSG_RESULT(32-bit)
+])
+
+
+
+AC_ARG_WITH(framework-name,
+              AC_HELP_STRING(--with-framework-name=FRAMEWORK, 
+                             specify an alternate name of the framework built with --enable-framework),
+[
+    PYTHONFRAMEWORK=${withval}
+    PYTHONFRAMEWORKDIR=${withval}.framework
+    PYTHONFRAMEWORKIDENTIFIER=org.python.`echo $withval | tr '[A-Z]' '[a-z]'`
+    ],[
+    PYTHONFRAMEWORK=Python
+    PYTHONFRAMEWORKDIR=Python.framework
+    PYTHONFRAMEWORKIDENTIFIER=org.python.python
+])
+dnl quadrigraphs "@<:@" and "@:>@" produce "[" and "]" in the output
+AC_ARG_ENABLE(framework,
+              AC_HELP_STRING(--enable-framework@<:@=INSTALLDIR@:>@, Build (MacOSX|Darwin) framework),
+[
+	case $enableval in
+	yes) 
+		enableval=/Library/Frameworks
+	esac
+	case $enableval in
+	no)
+		PYTHONFRAMEWORK=
+		PYTHONFRAMEWORKDIR=no-framework
+		PYTHONFRAMEWORKPREFIX=
+		PYTHONFRAMEWORKINSTALLDIR=
+		FRAMEWORKINSTALLFIRST=
+		FRAMEWORKINSTALLLAST=
+		FRAMEWORKALTINSTALLFIRST=
+		FRAMEWORKALTINSTALLLAST=
+		if test "x${prefix}" = "xNONE"; then
+			FRAMEWORKUNIXTOOLSPREFIX="${ac_default_prefix}"
+		else
+			FRAMEWORKUNIXTOOLSPREFIX="${prefix}"
+		fi
+		enable_framework=
+		;;
+	*)
+		PYTHONFRAMEWORKPREFIX=$enableval
+		PYTHONFRAMEWORKINSTALLDIR=$PYTHONFRAMEWORKPREFIX/$PYTHONFRAMEWORKDIR
+		FRAMEWORKINSTALLFIRST="frameworkinstallstructure"
+		FRAMEWORKALTINSTALLFIRST="frameworkinstallstructure "
+		case "${UNIVERSAL_ARCHS}" in
+		all|3-way|intel)
+			FRAMEWORKINSTALLLAST="frameworkinstallmaclib frameworkinstallapps4way frameworkinstallunixtools4way"
+			FRAMEWORKALTINSTALLLAST="frameworkinstallmaclib frameworkinstallapps4way frameworkaltinstallunixtools4way"
+			;;
+		*)
+			FRAMEWORKINSTALLLAST="frameworkinstallmaclib frameworkinstallapps frameworkinstallunixtools"
+			FRAMEWORKALTINSTALLLAST="frameworkinstallmaclib frameworkinstallapps frameworkaltinstallunixtools"
+			;;
+		esac
+
+		if test "x${prefix}" = "xNONE" ; then
+			FRAMEWORKUNIXTOOLSPREFIX="${ac_default_prefix}"
+		else
+			FRAMEWORKUNIXTOOLSPREFIX="${prefix}"
+		fi
+		prefix=$PYTHONFRAMEWORKINSTALLDIR/Versions/$VERSION
+
+		# Add files for Mac specific code to the list of output
+		# files:
+		AC_CONFIG_FILES(Mac/Makefile)
+		AC_CONFIG_FILES(Mac/PythonLauncher/Makefile)
+		AC_CONFIG_FILES(Mac/Resources/framework/Info.plist)
+		AC_CONFIG_FILES(Mac/Resources/app/Info.plist)
+	esac
+	],[
+	PYTHONFRAMEWORK=
+	PYTHONFRAMEWORKDIR=no-framework
+	PYTHONFRAMEWORKPREFIX=
+	PYTHONFRAMEWORKINSTALLDIR=
+	FRAMEWORKINSTALLFIRST=
+	FRAMEWORKINSTALLLAST=
+	FRAMEWORKALTINSTALLFIRST=
+	FRAMEWORKALTINSTALLLAST=
+	if test "x${prefix}" = "xNONE" ; then
+		FRAMEWORKUNIXTOOLSPREFIX="${ac_default_prefix}"
+	else
+		FRAMEWORKUNIXTOOLSPREFIX="${prefix}"
+	fi
+	enable_framework=
+
+	if test "$UNIVERSAL_ARCHS" = "all" 
+	then
+		FRAMEWORKINSTALLLAST=update4wayuniversal
+		FRAMEWORKALTINSTALLLAST=update4wayuniversal
+	fi
+])
+AC_SUBST(PYTHONFRAMEWORK)
+AC_SUBST(PYTHONFRAMEWORKIDENTIFIER)
+AC_SUBST(PYTHONFRAMEWORKDIR)
+AC_SUBST(PYTHONFRAMEWORKPREFIX)
+AC_SUBST(PYTHONFRAMEWORKINSTALLDIR)
+AC_SUBST(FRAMEWORKINSTALLFIRST)
+AC_SUBST(FRAMEWORKINSTALLLAST)
+AC_SUBST(FRAMEWORKALTINSTALLFIRST)
+AC_SUBST(FRAMEWORKALTINSTALLLAST)
+AC_SUBST(FRAMEWORKUNIXTOOLSPREFIX)
+
+##AC_ARG_WITH(dyld,
+##            AC_HELP_STRING(--with-dyld,
+##                           Use (OpenStep|Rhapsody) dynamic linker))
+##
+# Set name for machine-dependent library files
+AC_SUBST(MACHDEP)
+AC_MSG_CHECKING(MACHDEP)
+if test -z "$MACHDEP"
+then
+	ac_sys_system=`uname -s`
+	if test "$ac_sys_system" = "AIX" \
+	-o "$ac_sys_system" = "UnixWare" -o "$ac_sys_system" = "OpenUNIX"; then
+		ac_sys_release=`uname -v`
+	else
+		ac_sys_release=`uname -r`
+	fi
+	ac_md_system=`echo $ac_sys_system |
+			   tr -d '[/ ]' | tr '[[A-Z]]' '[[a-z]]'`
+	ac_md_release=`echo $ac_sys_release |
+			   tr -d '[/ ]' | sed 's/^[[A-Z]]\.//' | sed 's/\..*//'`
+	MACHDEP="$ac_md_system$ac_md_release"
+
+	case $MACHDEP in
+	cygwin*) MACHDEP="cygwin";;
+	darwin*) MACHDEP="darwin";;
+	atheos*) MACHDEP="atheos";;
+        irix646) MACHDEP="irix6";;
+	'')	MACHDEP="unknown";;
+	esac
+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.
+  # In addition, Stefan Krah confirms that issue #1244610 exists through
+  # OpenBSD 4.6, but is fixed in 4.7.
+  OpenBSD/2.* | OpenBSD/3.@<:@0123456789@:>@ | OpenBSD/4.@<:@0123456@:>@) 
+    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])
+    ;;
+  OpenBSD/4.@<:@789@:>@)
+    # 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;;
+  Darwin/1@<:@0-9@:>@.*)
+    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|SunOS/5.11)
+      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(_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
+
+#
+# SGI compilers allow the specification of the both the ABI and the
+# ISA on the command line.  Depending on the values of these switches,
+# different and often incompatable code will be generated.
+#
+# The SGI_ABI variable can be used to modify the CC and LDFLAGS and
+# thus supply support for various ABI/ISA combinations.  The MACHDEP
+# variable is also adjusted.
+#
+AC_SUBST(SGI_ABI)
+if test ! -z "$SGI_ABI"
+then
+        CC="cc $SGI_ABI"
+        LDFLAGS="$SGI_ABI $LDFLAGS"
+        MACHDEP=`echo "${MACHDEP}${SGI_ABI}" | sed 's/ *//g'`
+fi
+AC_MSG_RESULT($MACHDEP)
+
+# Record the configure-time value of MACOSX_DEPLOYMENT_TARGET,
+# it may influence the way we can build extensions, so distutils
+# needs to check it
+AC_SUBST(CONFIGURE_MACOSX_DEPLOYMENT_TARGET)
+AC_SUBST(EXPORT_MACOSX_DEPLOYMENT_TARGET)
+CONFIGURE_MACOSX_DEPLOYMENT_TARGET=
+EXPORT_MACOSX_DEPLOYMENT_TARGET='#'
+
+AC_MSG_CHECKING(machine type as reported by uname -m)
+ac_sys_machine=`uname -m`
+AC_MSG_RESULT($ac_sys_machine)
+
+# checks for alternative programs
+
+# compiler flags are generated in two sets, BASECFLAGS and OPT.  OPT is just
+# for debug/optimization stuff.  BASECFLAGS is for flags that are required
+# just to get things to compile and link.  Users are free to override OPT
+# when running configure or make.  The build should not break if they do.
+# BASECFLAGS should generally not be messed with, however.
+
+# XXX shouldn't some/most/all of this code be merged with the stuff later
+# on that fiddles with OPT and BASECFLAGS?
+AC_MSG_CHECKING(for --without-gcc)
+AC_ARG_WITH(gcc,
+            AC_HELP_STRING(--without-gcc,never use gcc),
+[
+	case $withval in
+	no)	CC=${CC:-cc}
+		without_gcc=yes;;
+	yes)	CC=gcc
+		without_gcc=no;;
+	*)	CC=$withval
+		without_gcc=$withval;;
+	esac], [
+	case $ac_sys_system in
+	AIX*)   CC=${CC:-xlc_r}
+		without_gcc=;;
+	*)	without_gcc=no;;
+	esac])
+AC_MSG_RESULT($without_gcc)
+
+# If the user switches compilers, we can't believe the cache
+if test ! -z "$ac_cv_prog_CC" -a ! -z "$CC" -a "$CC" != "$ac_cv_prog_CC"
+then
+  AC_MSG_ERROR([cached CC is different -- throw away $cache_file
+(it is also a good idea to do 'make clean' before compiling)])
+fi
+
+AC_PROG_CC
+
+AC_SUBST(CXX)
+AC_SUBST(MAINCC)
+AC_MSG_CHECKING(for --with-cxx-main=<compiler>)
+AC_ARG_WITH(cxx_main,
+            AC_HELP_STRING([--with-cxx-main=<compiler>],
+                           [compile main() and link python executable with C++ compiler]),
+[
+	
+	case $withval in
+	no)	with_cxx_main=no
+		MAINCC='$(CC)';;
+	yes)	with_cxx_main=yes
+		MAINCC='$(CXX)';;
+	*)	with_cxx_main=yes
+		MAINCC=$withval
+		if test -z "$CXX"
+		then
+			CXX=$withval
+		fi;;
+	esac], [
+	with_cxx_main=no
+	MAINCC='$(CC)'
+])
+AC_MSG_RESULT($with_cxx_main)
+
+preset_cxx="$CXX"
+if test -z "$CXX"
+then
+        case "$CC" in
+        gcc)    AC_PATH_PROG(CXX, [g++], [g++], [notfound]) ;;
+        cc)     AC_PATH_PROG(CXX, [c++], [c++], [notfound]) ;;
+        esac
+	if test "$CXX" = "notfound"
+	then
+		CXX=""
+	fi
+fi
+if test -z "$CXX"
+then
+	AC_CHECK_PROGS(CXX, $CCC c++ g++ gcc CC cxx cc++ cl, notfound)
+	if test "$CXX" = "notfound"
+	then
+		CXX=""
+	fi
+fi
+if test "$preset_cxx" != "$CXX"
+then
+        AC_MSG_WARN([
+
+  By default, distutils will build C++ extension modules with "$CXX".
+  If this is not intended, then set CXX on the configure command line.
+  ])
+fi
+
+
+# checks for UNIX variants that set C preprocessor variables
+AC_AIX
+
+# Check for unsupported systems
+case $ac_sys_system/$ac_sys_release in
+atheos*|Linux*/1*)
+   echo This system \($ac_sys_system/$ac_sys_release\) is no longer supported.
+   echo See README for details.
+   exit 1;;
+esac
+
+AC_EXEEXT
+AC_MSG_CHECKING(for --with-suffix)
+AC_ARG_WITH(suffix,
+            AC_HELP_STRING(--with-suffix=.exe, set executable suffix),
+[
+	case $withval in
+	no)	EXEEXT=;;
+	yes)	EXEEXT=.exe;;
+	*)	EXEEXT=$withval;;
+	esac])
+AC_MSG_RESULT($EXEEXT)
+
+# Test whether we're running on a non-case-sensitive system, in which
+# case we give a warning if no ext is given
+AC_SUBST(BUILDEXEEXT)
+AC_MSG_CHECKING(for case-insensitive build directory)
+if test ! -d CaseSensitiveTestDir; then
+mkdir CaseSensitiveTestDir
+fi
+
+if test -d casesensitivetestdir
+then
+    AC_MSG_RESULT(yes)
+    BUILDEXEEXT=.exe
+else
+	AC_MSG_RESULT(no)
+	BUILDEXEEXT=$EXEEXT
+fi
+rmdir CaseSensitiveTestDir
+
+case $MACHDEP in
+bsdos*)
+    case $CC in
+    gcc) CC="$CC -D_HAVE_BSDI";;
+    esac;;
+esac
+
+case $ac_sys_system in
+hp*|HP*)
+    case $CC in
+    cc|*/cc) CC="$CC -Ae";;
+    esac;;
+SunOS*)
+    # Some functions have a prototype only with that define, e.g. confstr
+    AC_DEFINE(__EXTENSIONS__, 1, [Defined on Solaris to see additional function prototypes.])
+    ;;
+esac
+
+
+AC_SUBST(LIBRARY)
+AC_MSG_CHECKING(LIBRARY)
+if test -z "$LIBRARY"
+then
+	LIBRARY='libpython$(VERSION).a'
+fi
+AC_MSG_RESULT($LIBRARY)
+
+# LDLIBRARY is the name of the library to link against (as opposed to the
+# name of the library into which to insert object files). BLDLIBRARY is also
+# the library to link against, usually. On Mac OS X frameworks, BLDLIBRARY
+# is blank as the main program is not linked directly against LDLIBRARY.
+# LDLIBRARYDIR is the path to LDLIBRARY, which is made in a subdirectory. On
+# systems without shared libraries, LDLIBRARY is the same as LIBRARY
+# (defined in the Makefiles). On Cygwin LDLIBRARY is the import library,
+# DLLLIBRARY is the shared (i.e., DLL) library.
+# 
+# RUNSHARED is used to run shared python without installed libraries
+#
+# INSTSONAME is the name of the shared library that will be use to install
+# on the system - some systems like version suffix, others don't
+AC_SUBST(LDLIBRARY)
+AC_SUBST(DLLLIBRARY)
+AC_SUBST(BLDLIBRARY)
+AC_SUBST(LDLIBRARYDIR)
+AC_SUBST(INSTSONAME)
+AC_SUBST(RUNSHARED)
+LDLIBRARY="$LIBRARY"
+BLDLIBRARY='$(LDLIBRARY)'
+INSTSONAME='$(LDLIBRARY)'
+DLLLIBRARY=''
+LDLIBRARYDIR=''
+RUNSHARED=''
+
+# LINKCC is the command that links the python executable -- default is $(CC).
+# If CXX is set, and if it is needed to link a main function that was
+# compiled with CXX, LINKCC is CXX instead. Always using CXX is undesirable:
+# python might then depend on the C++ runtime
+# This is altered for AIX in order to build the export list before 
+# linking.
+AC_SUBST(LINKCC)
+AC_MSG_CHECKING(LINKCC)
+if test -z "$LINKCC"
+then
+	LINKCC='$(PURIFY) $(MAINCC)'
+	case $ac_sys_system in
+	AIX*)
+	   exp_extra="\"\""
+	   if test $ac_sys_release -ge 5 -o \
+		   $ac_sys_release -eq 4 -a `uname -r` -ge 2 ; then
+	       exp_extra="."
+	   fi
+	   LINKCC="\$(srcdir)/Modules/makexp_aix Modules/python.exp $exp_extra \$(LIBRARY); $LINKCC";;
+	QNX*)
+	   # qcc must be used because the other compilers do not
+	   # support -N.
+	   LINKCC=qcc;;
+	esac
+fi
+AC_MSG_RESULT($LINKCC)
+
+# GNULD is set to "yes" if the GNU linker is used.  If this goes wrong
+# make sure we default having it set to "no": this is used by
+# distutils.unixccompiler to know if it should add --enable-new-dtags
+# to linker command lines, and failing to detect GNU ld simply results
+# in the same bahaviour as before.
+AC_SUBST(GNULD)
+AC_MSG_CHECKING(for GNU ld)
+ac_prog=ld
+if test "$GCC" = yes; then
+       ac_prog=`$CC -print-prog-name=ld`
+fi
+case `"$ac_prog" -V 2>&1 < /dev/null` in
+      *GNU*)
+          GNULD=yes;;
+      *)
+          GNULD=no;;
+esac
+AC_MSG_RESULT($GNULD)
+
+AC_MSG_CHECKING(for --enable-shared)
+AC_ARG_ENABLE(shared,
+              AC_HELP_STRING(--enable-shared, disable/enable building shared python library))
+
+if test -z "$enable_shared"
+then 
+  case $ac_sys_system in
+  CYGWIN* | atheos*)
+    enable_shared="yes";;
+  *)
+    enable_shared="no";;
+  esac
+fi
+AC_MSG_RESULT($enable_shared)
+
+AC_MSG_CHECKING(for --enable-profiling)
+AC_ARG_ENABLE(profiling,
+              AC_HELP_STRING(--enable-profiling, enable C-level code profiling),
+[ac_save_cc="$CC"
+ CC="$CC -pg"
+ AC_TRY_RUN([int main() { return 0; }],
+   ac_enable_profiling="yes",
+   ac_enable_profiling="no",
+   ac_enable_profiling="no")
+ CC="$ac_save_cc"])
+AC_MSG_RESULT($ac_enable_profiling)
+
+case "$ac_enable_profiling" in
+    "yes")
+	BASECFLAGS="-pg $BASECFLAGS"
+	LDFLAGS="-pg $LDFLAGS"
+    ;;
+esac
+
+AC_MSG_CHECKING(LDLIBRARY)
+
+# MacOSX framework builds need more magic. LDLIBRARY is the dynamic
+# library that we build, but we do not want to link against it (we
+# will find it with a -framework option). For this reason there is an
+# extra variable BLDLIBRARY against which Python and the extension
+# modules are linked, BLDLIBRARY. This is normally the same as
+# LDLIBRARY, but empty for MacOSX framework builds.
+if test "$enable_framework"
+then
+  LDLIBRARY='$(PYTHONFRAMEWORKDIR)/Versions/$(VERSION)/$(PYTHONFRAMEWORK)'
+  RUNSHARED=DYLD_FRAMEWORK_PATH="`pwd`:$DYLD_FRAMEWORK_PATH"
+  BLDLIBRARY=''
+else
+  BLDLIBRARY='$(LDLIBRARY)'
+fi  
+
+# Other platforms follow
+if test $enable_shared = "yes"; then
+  AC_DEFINE(Py_ENABLE_SHARED, 1, [Defined if Python is built as a shared library.])
+  case $ac_sys_system in
+    CYGWIN*)
+          LDLIBRARY='libpython$(VERSION).dll.a'
+          DLLLIBRARY='libpython$(VERSION).dll'
+          ;;
+    SunOS*)
+	  LDLIBRARY='libpython$(VERSION).so'
+	  BLDLIBRARY='-Wl,-R,$(LIBDIR) -L. -lpython$(VERSION)'
+	  RUNSHARED=LD_LIBRARY_PATH=`pwd`:${LD_LIBRARY_PATH}
+	  INSTSONAME="$LDLIBRARY".$SOVERSION
+          ;;
+    Linux*|GNU*|NetBSD*|FreeBSD*|DragonFly*)
+	  LDLIBRARY='libpython$(VERSION).so'
+	  BLDLIBRARY='-L. -lpython$(VERSION)'
+	  RUNSHARED=LD_LIBRARY_PATH=`pwd`:${LD_LIBRARY_PATH}
+	  case $ac_sys_system in
+	      FreeBSD*)
+		SOVERSION=`echo $SOVERSION|cut -d "." -f 1`
+		;;
+	  esac
+	  INSTSONAME="$LDLIBRARY".$SOVERSION
+	  ;;
+    hp*|HP*)
+	  case `uname -m` in
+		ia64)
+			LDLIBRARY='libpython$(VERSION).so'
+			;;
+		*)
+			LDLIBRARY='libpython$(VERSION).sl'
+			;;
+	  esac
+	  BLDLIBRARY='-Wl,+b,$(LIBDIR) -L. -lpython$(VERSION)'
+	  RUNSHARED=SHLIB_PATH=`pwd`:${SHLIB_PATH}
+	  ;;
+    OSF*)
+	  LDLIBRARY='libpython$(VERSION).so'
+	  BLDLIBRARY='-rpath $(LIBDIR) -L. -lpython$(VERSION)'
+	  RUNSHARED=LD_LIBRARY_PATH=`pwd`:${LD_LIBRARY_PATH}
+	  ;;
+    atheos*)
+	  LDLIBRARY='libpython$(VERSION).so'
+	  BLDLIBRARY='-L. -lpython$(VERSION)'
+	  RUNSHARED=DLL_PATH=`pwd`:${DLL_PATH:-/atheos/sys/libs:/atheos/autolnk/lib}
+	  ;;
+    Darwin*)
+    	LDLIBRARY='libpython$(VERSION).dylib'
+	BLDLIBRARY='-L. -lpython$(VERSION)'
+	RUNSHARED='DYLD_LIBRARY_PATH=`pwd`:${DYLD_LIBRARY_PATH}'
+	;;
+    AIX*)
+	LDLIBRARY='libpython$(VERSION).so'
+	RUNSHARED=LIBPATH=`pwd`:${LIBPATH}
+	;;
+
+  esac
+else # shared is disabled
+  case $ac_sys_system in
+    CYGWIN*)
+          BLDLIBRARY='$(LIBRARY)'
+          LDLIBRARY='libpython$(VERSION).dll.a'
+          ;;
+  esac
+fi
+
+AC_MSG_RESULT($LDLIBRARY)
+
+AC_PROG_RANLIB
+AC_SUBST(AR)
+AC_CHECK_PROGS(AR, ar aal, ar)
+
+# tweak ARFLAGS only if the user didn't set it on the command line
+AC_SUBST(ARFLAGS)
+if test -z "$ARFLAGS"
+then
+        ARFLAGS="rc"
+fi
+
+AC_SUBST(SVNVERSION)
+AC_CHECK_PROG(SVNVERSION, svnversion, found, not-found)
+if test $SVNVERSION = found
+then
+	SVNVERSION="svnversion \$(srcdir)"
+else
+	SVNVERSION="echo Unversioned directory"
+fi
+
+AC_SUBST(HGVERSION)
+AC_SUBST(HGTAG)
+AC_SUBST(HGBRANCH)
+AC_CHECK_PROG(HAS_HG, hg, found, not-found)
+if test $HAS_HG = found
+then
+    HGVERSION="hg id -i \$(srcdir)"
+    HGTAG="hg id -t \$(srcdir)"
+    HGBRANCH="hg id -b \$(srcdir)"
+else
+    HGVERSION=""
+    HGTAG=""
+    HGBRANCH=""
+fi
+
+case $MACHDEP in
+bsdos*|hp*|HP*)
+	# install -d does not work on BSDI or HP-UX
+	if test -z "$INSTALL"
+	then
+		INSTALL="${srcdir}/install-sh -c"
+	fi
+esac
+AC_PROG_INSTALL
+
+# Not every filesystem supports hard links
+AC_SUBST(LN)
+if test -z "$LN" ; then
+	case $ac_sys_system in
+		CYGWIN*) LN="ln -s";;
+		atheos*) LN="ln -s";;
+		*) LN=ln;;
+	esac
+fi
+
+# Check for --with-pydebug
+AC_MSG_CHECKING(for --with-pydebug)
+AC_ARG_WITH(pydebug, 
+            AC_HELP_STRING(--with-pydebug, build with Py_DEBUG defined),
+[
+if test "$withval" != no
+then 
+  AC_DEFINE(Py_DEBUG, 1, 
+  [Define if you want to build an interpreter with many run-time checks.]) 
+  AC_MSG_RESULT(yes); 
+  Py_DEBUG='true'
+else AC_MSG_RESULT(no); Py_DEBUG='false'
+fi],
+[AC_MSG_RESULT(no)])
+
+# XXX Shouldn't the code above that fiddles with BASECFLAGS and OPT be
+# merged with this chunk of code?
+
+# Optimizer/debugger flags
+# ------------------------
+# (The following bit of code is complicated enough - please keep things
+# indented properly.  Just pretend you're editing Python code. ;-)
+
+# There are two parallel sets of case statements below, one that checks to
+# see if OPT was set and one that does BASECFLAGS setting based upon
+# compiler and platform.  BASECFLAGS tweaks need to be made even if the
+# user set OPT.
+
+# tweak OPT based on compiler and platform, only if the user didn't set
+# it on the command line
+AC_SUBST(OPT)
+if test "${OPT-unset}" = "unset"
+then
+    case $GCC in
+    yes)
+        if test "$CC" != 'g++' ; then
+	    STRICT_PROTO="-Wstrict-prototypes"
+	fi
+        # For gcc 4.x we need to use -fwrapv so lets check if its supported
+        if "$CC" -v --help 2>/dev/null |grep -- -fwrapv > /dev/null; then
+           WRAP="-fwrapv"
+        fi
+	case $ac_cv_prog_cc_g in
+	yes)
+	    if test "$Py_DEBUG" = 'true' ; then
+		# Optimization messes up debuggers, so turn it off for
+		# debug builds.
+		OPT="-g -Wall $STRICT_PROTO"
+	    else
+		OPT="-g $WRAP -O3 -Wall $STRICT_PROTO"
+	    fi
+	    ;;
+	*)
+	    OPT="-O3 -Wall $STRICT_PROTO"
+	    ;;
+	esac
+	case $ac_sys_system in
+	    SCO_SV*) OPT="$OPT -m486 -DSCO5"
+	    ;;
+        esac
+	;;
+
+    *)
+	OPT="-O"
+	;;
+    esac
+fi
+
+AC_SUBST(BASECFLAGS)
+
+# The -arch flags for universal builds on OSX
+UNIVERSAL_ARCH_FLAGS=
+AC_SUBST(UNIVERSAL_ARCH_FLAGS)
+
+# tweak BASECFLAGS based on compiler and platform
+case $GCC in
+yes)
+    # Python doesn't violate C99 aliasing rules, but older versions of
+    # GCC produce warnings for legal Python code.  Enable
+    # -fno-strict-aliasing on versions of GCC that support but produce
+    # warnings.  See Issue3326
+    AC_MSG_CHECKING(whether $CC accepts and needs -fno-strict-aliasing)
+     ac_save_cc="$CC"
+     CC="$CC -fno-strict-aliasing"
+     save_CFLAGS="$CFLAGS"
+     AC_CACHE_VAL(ac_cv_no_strict_aliasing,
+       AC_COMPILE_IFELSE(
+         [
+	   AC_LANG_PROGRAM([[]], [[]])
+	 ],[
+	   CC="$ac_save_cc -fstrict-aliasing"
+           CFLAGS="$CFLAGS -Werror -Wstrict-aliasing"
+           AC_COMPILE_IFELSE(
+	     [
+	       AC_LANG_PROGRAM([[void f(int **x) {}]],
+	         [[double *x; f((int **) &x);]])
+	     ],[
+	       ac_cv_no_strict_aliasing=no
+	     ],[
+               ac_cv_no_strict_aliasing=yes
+	     ])
+	 ],[
+	   ac_cv_no_strict_aliasing=no
+	 ]))
+     CFLAGS="$save_CFLAGS"
+     CC="$ac_save_cc"
+    AC_MSG_RESULT($ac_cv_no_strict_aliasing)
+    if test $ac_cv_no_strict_aliasing = yes
+    then
+      BASECFLAGS="$BASECFLAGS -fno-strict-aliasing"
+    fi
+
+    # if using gcc on alpha, use -mieee to get (near) full IEEE 754
+    # support.  Without this, treatment of subnormals doesn't follow
+    # the standard.
+    case $ac_sys_machine in
+         alpha*)
+                BASECFLAGS="$BASECFLAGS -mieee"
+                ;;
+    esac
+
+    case $ac_sys_system in
+	SCO_SV*)
+	    BASECFLAGS="$BASECFLAGS -m486 -DSCO5"
+	    ;;
+	# is there any other compiler on Darwin besides gcc?
+	Darwin*)
+	    # -Wno-long-double, -no-cpp-precomp, and -mno-fused-madd
+	    # used to be here, but non-Apple gcc doesn't accept them.
+            if test "${CC}" = gcc
+	    then
+		AC_MSG_CHECKING(which compiler should be used)
+		case "${UNIVERSALSDK}" in
+		*/MacOSX10.4u.sdk)
+			# Build using 10.4 SDK, force usage of gcc when the 
+			# compiler is gcc, otherwise the user will get very
+			# confusing error messages when building on OSX 10.6
+			CC=gcc-4.0
+			CPP=cpp-4.0
+			;;
+		esac
+		AC_MSG_RESULT($CC)
+	    fi
+
+
+	    if test "${enable_universalsdk}"; then
+		UNIVERSAL_ARCH_FLAGS=""
+	        if test "$UNIVERSAL_ARCHS" = "32-bit" ; then
+		   ARCH_RUN_32BIT=""
+		   UNIVERSAL_ARCH_FLAGS="-arch ppc -arch i386"
+
+	         elif test "$UNIVERSAL_ARCHS" = "64-bit" ; then
+		   ARCH_RUN_32BIT="true"
+		   UNIVERSAL_ARCH_FLAGS="-arch ppc64 -arch x86_64"
+
+	         elif test "$UNIVERSAL_ARCHS" = "all" ; then
+		   ARCH_RUN_32BIT="/usr/bin/arch -i386 -ppc"
+		   UNIVERSAL_ARCH_FLAGS="-arch i386 -arch ppc -arch ppc64 -arch x86_64"
+		   LIPO_32BIT_FLAGS="-extract i386 -extract ppc7400"
+		   LIPO_64BIT_FLAGS="-extract x86_64 -extract ppc64"
+
+	         elif test "$UNIVERSAL_ARCHS" = "intel" ; then
+		   ARCH_RUN_32BIT="/usr/bin/arch -i386"
+		   UNIVERSAL_ARCH_FLAGS="-arch i386 -arch x86_64"
+		   LIPO_32BIT_FLAGS="-extract i386"
+		   LIPO_64BIT_FLAGS="-extract x86_64"
+
+	         elif test "$UNIVERSAL_ARCHS" = "3-way" ; then
+		   ARCH_RUN_32BIT="/usr/bin/arch -i386 -ppc"
+		   UNIVERSAL_ARCH_FLAGS="-arch i386 -arch ppc -arch x86_64"
+		   LIPO_32BIT_FLAGS="-extract i386 -extract ppc7400"
+		   LIPO_64BIT_FLAGS="-extract x86_64"
+
+		 else
+	           AC_MSG_ERROR([proper usage is --with-universal-arch=32-bit|64-bit|all|intel|3-way])
+
+		 fi
+
+
+		CFLAGS="${UNIVERSAL_ARCH_FLAGS} -isysroot ${UNIVERSALSDK} ${CFLAGS}"
+		if test "${UNIVERSALSDK}" != "/"
+		then
+			CFLAGS="-isysroot ${UNIVERSALSDK} ${CFLAGS}"
+			LDFLAGS="-isysroot ${UNIVERSALSDK} ${LDFLAGS}"
+			CPPFLAGSFLAGS="-isysroot ${UNIVERSALSDK} ${CPPFLAGS}"
+		fi
+	    fi
+
+	    # Calculate the right deployment target for this build.
+	    #
+	    cur_target=`sw_vers -productVersion | sed 's/\(10\.[[0-9]]*\).*/\1/'`
+	    if test ${cur_target} '>' 10.2; then
+		    cur_target=10.3
+		    if test ${enable_universalsdk}; then
+			    if test "${UNIVERSAL_ARCHS}" = "all"; then
+				    # Ensure that the default platform for a 
+				    # 4-way universal build is OSX 10.5, 
+				    # that's the first OS release where 
+				    # 4-way builds make sense.
+				    cur_target='10.5'
+
+			    elif test "${UNIVERSAL_ARCHS}" = "3-way"; then
+				    cur_target='10.5'
+
+			    elif test "${UNIVERSAL_ARCHS}" = "intel"; then
+				    cur_target='10.5'
+
+			    elif test "${UNIVERSAL_ARCHS}" = "64-bit"; then
+				    cur_target='10.5'
+			    fi
+		    else
+			    if test `/usr/bin/arch` = "i386"; then
+				    # On Intel macs default to a deployment
+				    # target of 10.4, that's the first OSX
+				    # release with Intel support.
+				    cur_target="10.4"
+			    fi
+		    fi
+	    fi
+	    CONFIGURE_MACOSX_DEPLOYMENT_TARGET=${MACOSX_DEPLOYMENT_TARGET-${cur_target}}
+	    
+	    # Make sure that MACOSX_DEPLOYMENT_TARGET is set in the 
+	    # environment with a value that is the same as what we'll use
+	    # in the Makefile to ensure that we'll get the same compiler
+	    # environment during configure and build time.
+	    MACOSX_DEPLOYMENT_TARGET="$CONFIGURE_MACOSX_DEPLOYMENT_TARGET"
+	    export MACOSX_DEPLOYMENT_TARGET
+	    EXPORT_MACOSX_DEPLOYMENT_TARGET=''
+
+	    ;;
+	OSF*)
+	    BASECFLAGS="$BASECFLAGS -mieee"
+	    ;;
+    esac
+    ;;
+
+*)
+    case $ac_sys_system in
+    OpenUNIX*|UnixWare*)
+	BASECFLAGS="$BASECFLAGS -K pentium,host,inline,loop_unroll,alloca "
+	;;
+    OSF*)
+	BASECFLAGS="$BASECFLAGS -ieee -std"
+    	;;
+    SCO_SV*)
+	BASECFLAGS="$BASECFLAGS -belf -Ki486 -DSCO5"
+	;;
+    esac
+    ;;
+esac
+
+if test "$Py_DEBUG" = 'true'; then
+  :
+else
+  OPT="-DNDEBUG $OPT"
+fi
+
+if test "$ac_arch_flags"
+then
+	BASECFLAGS="$BASECFLAGS $ac_arch_flags"
+fi
+
+# disable check for icc since it seems to pass, but generates a warning
+if test "$CC" = icc
+then
+  ac_cv_opt_olimit_ok=no
+fi
+
+AC_MSG_CHECKING(whether $CC accepts -OPT:Olimit=0)
+AC_CACHE_VAL(ac_cv_opt_olimit_ok,
+[ac_save_cc="$CC"
+CC="$CC -OPT:Olimit=0"
+AC_TRY_RUN([int main() { return 0; }],
+  ac_cv_opt_olimit_ok=yes,
+  ac_cv_opt_olimit_ok=no,
+  ac_cv_opt_olimit_ok=no)
+CC="$ac_save_cc"])
+AC_MSG_RESULT($ac_cv_opt_olimit_ok)
+if test $ac_cv_opt_olimit_ok = yes; then
+    case $ac_sys_system in
+	# XXX is this branch needed? On MacOSX 10.2.2 the result of the
+	# olimit_ok test is "no".  Is it "yes" in some other Darwin-esque
+	# environment?
+        Darwin*)
+	    ;;
+        *)
+	    BASECFLAGS="$BASECFLAGS -OPT:Olimit=0"
+	    ;;
+    esac
+else
+  AC_MSG_CHECKING(whether $CC accepts -Olimit 1500)
+  AC_CACHE_VAL(ac_cv_olimit_ok,
+  [ac_save_cc="$CC"
+  CC="$CC -Olimit 1500"
+  AC_TRY_RUN([int main() { return 0; }],
+    ac_cv_olimit_ok=yes,
+    ac_cv_olimit_ok=no,
+    ac_cv_olimit_ok=no)
+  CC="$ac_save_cc"])
+  AC_MSG_RESULT($ac_cv_olimit_ok)
+  if test $ac_cv_olimit_ok = yes; then
+    BASECFLAGS="$BASECFLAGS -Olimit 1500"
+  fi
+fi
+
+# Check whether GCC supports PyArg_ParseTuple format
+if test "$GCC" = "yes"
+then
+  AC_MSG_CHECKING(whether gcc supports ParseTuple __format__)
+  save_CFLAGS=$CFLAGS
+  CFLAGS="$CFLAGS -Werror"
+  AC_TRY_COMPILE([
+    void f(char*,...)__attribute((format(PyArg_ParseTuple, 1, 2)));
+  ],,
+  AC_DEFINE(HAVE_ATTRIBUTE_FORMAT_PARSETUPLE, 1, [Define if GCC supports __attribute__((format(PyArg_ParseTuple, 2, 3)))])
+  AC_MSG_RESULT(yes),
+  AC_MSG_RESULT(no)
+  )
+  CFLAGS=$save_CFLAGS
+fi
+
+# On some compilers, pthreads are available without further options
+# (e.g. MacOS X). On some of these systems, the compiler will not
+# complain if unaccepted options are passed (e.g. gcc on Mac OS X).
+# So we have to see first whether pthreads are available without
+# options before we can check whether -Kpthread improves anything.
+AC_MSG_CHECKING(whether pthreads are available without options)
+AC_CACHE_VAL(ac_cv_pthread_is_default,
+[AC_TRY_RUN([
+#include <pthread.h>
+
+void* routine(void* p){return NULL;}
+
+int main(){
+  pthread_t p;
+  if(pthread_create(&p,NULL,routine,NULL)!=0)
+    return 1;
+  (void)pthread_detach(p);
+  return 0;
+}
+],
+[
+  ac_cv_pthread_is_default=yes
+  ac_cv_kthread=no
+  ac_cv_pthread=no
+],
+  ac_cv_pthread_is_default=no,
+  ac_cv_pthread_is_default=no)
+])
+AC_MSG_RESULT($ac_cv_pthread_is_default)
+
+
+if test $ac_cv_pthread_is_default = yes 
+then
+  ac_cv_kpthread=no
+else
+# -Kpthread, if available, provides the right #defines
+# and linker options to make pthread_create available
+# Some compilers won't report that they do not support -Kpthread,
+# so we need to run a program to see whether it really made the
+# function available.
+AC_MSG_CHECKING(whether $CC accepts -Kpthread)
+AC_CACHE_VAL(ac_cv_kpthread,
+[ac_save_cc="$CC"
+CC="$CC -Kpthread"
+AC_TRY_RUN([
+#include <pthread.h>
+
+void* routine(void* p){return NULL;}
+
+int main(){
+  pthread_t p;
+  if(pthread_create(&p,NULL,routine,NULL)!=0)
+    return 1;
+  (void)pthread_detach(p);
+  return 0;
+}
+],
+  ac_cv_kpthread=yes,
+  ac_cv_kpthread=no,
+  ac_cv_kpthread=no)
+CC="$ac_save_cc"])
+AC_MSG_RESULT($ac_cv_kpthread)
+fi
+
+if test $ac_cv_kpthread = no -a $ac_cv_pthread_is_default = no
+then
+# -Kthread, if available, provides the right #defines
+# and linker options to make pthread_create available
+# Some compilers won't report that they do not support -Kthread,
+# so we need to run a program to see whether it really made the
+# function available.
+AC_MSG_CHECKING(whether $CC accepts -Kthread)
+AC_CACHE_VAL(ac_cv_kthread,
+[ac_save_cc="$CC"
+CC="$CC -Kthread"
+AC_TRY_RUN([
+#include <pthread.h>
+
+void* routine(void* p){return NULL;}
+
+int main(){
+  pthread_t p;
+  if(pthread_create(&p,NULL,routine,NULL)!=0)
+    return 1;
+  (void)pthread_detach(p);
+  return 0;
+}
+],
+  ac_cv_kthread=yes,
+  ac_cv_kthread=no,
+  ac_cv_kthread=no)
+CC="$ac_save_cc"])
+AC_MSG_RESULT($ac_cv_kthread)
+fi
+
+if test $ac_cv_kthread = no -a $ac_cv_pthread_is_default = no
+then
+# -pthread, if available, provides the right #defines
+# and linker options to make pthread_create available
+# Some compilers won't report that they do not support -pthread,
+# so we need to run a program to see whether it really made the
+# function available.
+AC_MSG_CHECKING(whether $CC accepts -pthread)
+AC_CACHE_VAL(ac_cv_thread,
+[ac_save_cc="$CC"
+CC="$CC -pthread"
+AC_TRY_RUN([
+#include <pthread.h>
+
+void* routine(void* p){return NULL;}
+
+int main(){
+  pthread_t p;
+  if(pthread_create(&p,NULL,routine,NULL)!=0)
+    return 1;
+  (void)pthread_detach(p);
+  return 0;
+}
+],
+  ac_cv_pthread=yes,
+  ac_cv_pthread=no,
+  ac_cv_pthread=no)
+CC="$ac_save_cc"])
+AC_MSG_RESULT($ac_cv_pthread)
+fi
+
+# If we have set a CC compiler flag for thread support then
+# check if it works for CXX, too.
+ac_cv_cxx_thread=no
+if test ! -z "$CXX"
+then
+AC_MSG_CHECKING(whether $CXX also accepts flags for thread support)
+ac_save_cxx="$CXX"
+
+if test "$ac_cv_kpthread" = "yes"
+then
+  CXX="$CXX -Kpthread"  
+  ac_cv_cxx_thread=yes
+elif test "$ac_cv_kthread" = "yes"
+then
+  CXX="$CXX -Kthread"
+  ac_cv_cxx_thread=yes
+elif test "$ac_cv_pthread" = "yes"
+then 
+  CXX="$CXX -pthread"
+  ac_cv_cxx_thread=yes
+fi
+
+if test $ac_cv_cxx_thread = yes
+then
+  echo 'void foo();int main(){foo();}void foo(){}' > conftest.$ac_ext
+  $CXX -c conftest.$ac_ext 2>&5
+  if $CXX -o conftest$ac_exeext conftest.$ac_objext 2>&5 \
+     && test -s conftest$ac_exeext && ./conftest$ac_exeext
+  then
+    ac_cv_cxx_thread=yes
+  else
+    ac_cv_cxx_thread=no
+  fi
+  rm -fr conftest*
+fi
+AC_MSG_RESULT($ac_cv_cxx_thread)
+fi
+CXX="$ac_save_cxx"
+
+dnl # check for ANSI or K&R ("traditional") preprocessor
+dnl AC_MSG_CHECKING(for C preprocessor type)
+dnl AC_TRY_COMPILE([
+dnl #define spam(name, doc) {#name, &name, #name "() -- " doc}
+dnl int foo;
+dnl struct {char *name; int *addr; char *doc;} desc = spam(foo, "something");
+dnl ], [;], cpp_type=ansi, AC_DEFINE(HAVE_OLD_CPP) cpp_type=traditional)
+dnl AC_MSG_RESULT($cpp_type)
+
+# checks for header files
+AC_HEADER_STDC
+AC_CHECK_HEADERS(asm/types.h conio.h curses.h direct.h dlfcn.h errno.h \
+fcntl.h grp.h \
+ieeefp.h io.h langinfo.h libintl.h ncurses.h poll.h process.h pthread.h \
+shadow.h signal.h stdint.h stropts.h termios.h thread.h \
+unistd.h utime.h \
+sys/audioio.h sys/bsdtty.h sys/epoll.h sys/event.h sys/file.h sys/loadavg.h \
+sys/lock.h sys/mkdev.h sys/modem.h \
+sys/param.h sys/poll.h sys/select.h sys/socket.h sys/statvfs.h sys/stat.h \
+sys/termio.h sys/time.h \
+sys/times.h sys/types.h sys/un.h sys/utsname.h sys/wait.h pty.h libutil.h \
+sys/resource.h netpacket/packet.h sysexits.h bluetooth.h \
+bluetooth/bluetooth.h linux/tipc.h)
+AC_HEADER_DIRENT
+AC_HEADER_MAJOR
+
+# On Solaris, term.h requires curses.h
+AC_CHECK_HEADERS(term.h,,,[
+#ifdef HAVE_CURSES_H
+#include <curses.h>
+#endif
+])
+
+# On Linux, netlink.h requires asm/types.h
+AC_CHECK_HEADERS(linux/netlink.h,,,[
+#ifdef HAVE_ASM_TYPES_H
+#include <asm/types.h>
+#endif
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+])
+
+# checks for typedefs
+was_it_defined=no
+AC_MSG_CHECKING(for clock_t in time.h)
+AC_EGREP_HEADER(clock_t, time.h, was_it_defined=yes, [
+    AC_DEFINE(clock_t, long, [Define to 'long' if <time.h> doesn't define.])
+])
+AC_MSG_RESULT($was_it_defined)
+
+# Check whether using makedev requires defining _OSF_SOURCE
+AC_MSG_CHECKING(for makedev)
+AC_TRY_LINK([
+#if defined(MAJOR_IN_MKDEV)
+#include <sys/mkdev.h>
+#elif defined(MAJOR_IN_SYSMACROS)
+#include <sys/sysmacros.h>
+#else
+#include <sys/types.h>
+#endif ],
+	    [ makedev(0, 0) ],
+	    ac_cv_has_makedev=yes,
+	    ac_cv_has_makedev=no)
+if test "$ac_cv_has_makedev" = "no"; then
+    # we didn't link, try if _OSF_SOURCE will allow us to link
+    AC_TRY_LINK([
+#define _OSF_SOURCE 1
+#include <sys/types.h>
+    ],
+    [ makedev(0, 0) ],
+    ac_cv_has_makedev=yes,
+    ac_cv_has_makedev=no)
+    if test "$ac_cv_has_makedev" = "yes"; then
+        AC_DEFINE(_OSF_SOURCE, 1, [Define _OSF_SOURCE to get the makedev macro.])
+    fi
+fi
+AC_MSG_RESULT($ac_cv_has_makedev)
+if test "$ac_cv_has_makedev" = "yes"; then
+    AC_DEFINE(HAVE_MAKEDEV, 1, [Define this if you have the makedev macro.])
+fi
+
+# Enabling LFS on Solaris (2.6 to 9) with gcc 2.95 triggers a bug in
+# the system headers: If _XOPEN_SOURCE and _LARGEFILE_SOURCE are
+# defined, but the compiler does not support pragma redefine_extname,
+# and _LARGEFILE64_SOURCE is not defined, the headers refer to 64-bit
+# structures (such as rlimit64) without declaring them. As a
+# work-around, disable LFS on such configurations
+
+use_lfs=yes
+AC_MSG_CHECKING(Solaris LFS bug)
+AC_TRY_COMPILE([
+#define _LARGEFILE_SOURCE 1
+#define _FILE_OFFSET_BITS 64
+#include <sys/resource.h>
+],struct rlimit foo;,sol_lfs_bug=no,sol_lfs_bug=yes)
+AC_MSG_RESULT($sol_lfs_bug)
+if test "$sol_lfs_bug" = "yes"; then
+  use_lfs=no
+fi
+
+if test "$use_lfs" = "yes"; then
+# Two defines needed to enable largefile support on various platforms
+# These may affect some typedefs
+case $ac_sys_system/$ac_sys_release in
+AIX*)
+    AC_DEFINE(_LARGE_FILES, 1, 
+    [This must be defined on AIX systems to enable large file support.])
+    ;;
+esac
+AC_DEFINE(_LARGEFILE_SOURCE, 1, 
+[This must be defined on some systems to enable large file support.])
+AC_DEFINE(_FILE_OFFSET_BITS, 64,
+[This must be set to 64 on some systems to enable large file support.])
+fi
+
+# Add some code to confdefs.h so that the test for off_t works on SCO
+cat >> confdefs.h <<\EOF
+#if defined(SCO_DS)
+#undef _OFF_T
+#endif
+EOF
+
+# Type availability checks
+AC_TYPE_MODE_T
+AC_TYPE_OFF_T
+AC_TYPE_PID_T
+AC_TYPE_SIGNAL
+AC_TYPE_SIZE_T
+AC_TYPE_UID_T
+AC_TYPE_UINT32_T
+AC_TYPE_UINT64_T
+AC_TYPE_INT32_T
+AC_TYPE_INT64_T
+AC_CHECK_TYPE(ssize_t,
+  AC_DEFINE(HAVE_SSIZE_T, 1, Define if your compiler provides ssize_t),,)
+
+# Sizes of various common basic types
+# ANSI C requires sizeof(char) == 1, so no need to check it
+AC_CHECK_SIZEOF(int, 4)
+AC_CHECK_SIZEOF(long, 4)
+AC_CHECK_SIZEOF(void *, 4)
+AC_CHECK_SIZEOF(short, 2)
+AC_CHECK_SIZEOF(float, 4)
+AC_CHECK_SIZEOF(double, 8)
+AC_CHECK_SIZEOF(fpos_t, 4)
+AC_CHECK_SIZEOF(size_t, 4)
+AC_CHECK_SIZEOF(pid_t, 4)
+
+AC_MSG_CHECKING(for long long support)
+have_long_long=no
+AC_TRY_COMPILE([], [long long x; x = (long long)0;], [
+  AC_DEFINE(HAVE_LONG_LONG, 1, [Define this if you have the type long long.]) 
+  have_long_long=yes
+])
+AC_MSG_RESULT($have_long_long)
+if test "$have_long_long" = yes ; then
+AC_CHECK_SIZEOF(long long, 8)
+fi
+
+AC_MSG_CHECKING(for long double support)
+have_long_double=no
+AC_TRY_COMPILE([], [long double x; x = (long double)0;], [
+  AC_DEFINE(HAVE_LONG_DOUBLE, 1, [Define this if you have the type long double.]) 
+  have_long_double=yes
+])
+AC_MSG_RESULT($have_long_double)
+if test "$have_long_double" = yes ; then
+AC_CHECK_SIZEOF(long double, 16)
+fi
+
+
+AC_MSG_CHECKING(for _Bool support)
+have_c99_bool=no
+AC_TRY_COMPILE([], [_Bool x; x = (_Bool)0;], [
+  AC_DEFINE(HAVE_C99_BOOL, 1, [Define this if you have the type _Bool.]) 
+  have_c99_bool=yes
+])
+AC_MSG_RESULT($have_c99_bool)
+if test "$have_c99_bool" = yes ; then
+AC_CHECK_SIZEOF(_Bool, 1)
+fi
+
+AC_CHECK_TYPES(uintptr_t, 
+   [AC_CHECK_SIZEOF(uintptr_t, 4)], 
+   [], [#ifdef HAVE_STDINT_H
+        #include <stdint.h>
+        #endif
+        #ifdef HAVE_INTTYPES_H
+        #include <inttypes.h>
+        #endif])
+
+
+# Hmph. AC_CHECK_SIZEOF() doesn't include <sys/types.h>.
+AC_MSG_CHECKING(size of off_t)
+AC_CACHE_VAL(ac_cv_sizeof_off_t,
+[AC_TRY_RUN([#include <stdio.h>
+#include <sys/types.h>
+main()
+{
+  FILE *f=fopen("conftestval", "w");
+  if (!f) exit(1);
+  fprintf(f, "%d\n", sizeof(off_t));
+  exit(0);
+}],
+ac_cv_sizeof_off_t=`cat conftestval`,
+ac_cv_sizeof_off_t=0,
+ac_cv_sizeof_off_t=4)
+])
+AC_MSG_RESULT($ac_cv_sizeof_off_t)
+AC_DEFINE_UNQUOTED(SIZEOF_OFF_T, $ac_cv_sizeof_off_t,
+[The number of bytes in an off_t.])
+
+AC_MSG_CHECKING(whether to enable large file support)
+if test "$have_long_long" = yes
+then
+if test "$ac_cv_sizeof_off_t" -gt "$ac_cv_sizeof_long" -a \
+	"$ac_cv_sizeof_long_long" -ge "$ac_cv_sizeof_off_t"; then
+  AC_DEFINE(HAVE_LARGEFILE_SUPPORT, 1, 
+  [Defined to enable large file support when an off_t is bigger than a long
+   and long long is available and at least as big as an off_t. You may need
+   to add some flags for configuration and compilation to enable this mode.
+   (For Solaris and Linux, the necessary defines are already defined.)])
+  AC_MSG_RESULT(yes)
+else
+  AC_MSG_RESULT(no)
+fi
+else
+  AC_MSG_RESULT(no)
+fi
+
+# AC_CHECK_SIZEOF() doesn't include <time.h>.
+AC_MSG_CHECKING(size of time_t)
+AC_CACHE_VAL(ac_cv_sizeof_time_t,
+[AC_TRY_RUN([#include <stdio.h>
+#include <time.h>
+main()
+{
+  FILE *f=fopen("conftestval", "w");
+  if (!f) exit(1);
+  fprintf(f, "%d\n", sizeof(time_t));
+  exit(0);
+}],
+ac_cv_sizeof_time_t=`cat conftestval`,
+ac_cv_sizeof_time_t=0,
+ac_cv_sizeof_time_t=4)
+])
+AC_MSG_RESULT($ac_cv_sizeof_time_t)
+AC_DEFINE_UNQUOTED(SIZEOF_TIME_T, $ac_cv_sizeof_time_t, 
+[The number of bytes in a time_t.])
+
+
+# if have pthread_t then define SIZEOF_PTHREAD_T
+ac_save_cc="$CC"
+if test "$ac_cv_kpthread" = "yes"
+then CC="$CC -Kpthread"
+elif test "$ac_cv_kthread" = "yes"
+then CC="$CC -Kthread"
+elif test "$ac_cv_pthread" = "yes"
+then CC="$CC -pthread"
+fi
+AC_MSG_CHECKING(for pthread_t)
+have_pthread_t=no
+AC_TRY_COMPILE([#include <pthread.h>], [pthread_t x; x = *(pthread_t*)0;], have_pthread_t=yes)
+AC_MSG_RESULT($have_pthread_t)
+if test "$have_pthread_t" = yes ; then
+  # AC_CHECK_SIZEOF() doesn't include <pthread.h>.
+  AC_MSG_CHECKING(size of pthread_t)
+  AC_CACHE_VAL(ac_cv_sizeof_pthread_t,
+  [AC_TRY_RUN([#include <stdio.h>
+#include <pthread.h>
+  main()
+  {
+    FILE *f=fopen("conftestval", "w");
+    if (!f) exit(1);
+    fprintf(f, "%d\n", sizeof(pthread_t));
+    exit(0);
+  }],
+  ac_cv_sizeof_pthread_t=`cat conftestval`,
+  ac_cv_sizeof_pthread_t=0,
+  ac_cv_sizeof_pthread_t=4)
+  ])
+  AC_MSG_RESULT($ac_cv_sizeof_pthread_t)
+  AC_DEFINE_UNQUOTED(SIZEOF_PTHREAD_T, $ac_cv_sizeof_pthread_t,
+   [The number of bytes in a pthread_t.])
+fi
+CC="$ac_save_cc"
+
+
+
+AC_SUBST(OTHER_LIBTOOL_OPT)
+case $ac_sys_system/$ac_sys_release in
+  Darwin/@<:@01567@:>@\..*) 
+    OTHER_LIBTOOL_OPT="-prebind -seg1addr 0x10000000"
+    ;;
+  Darwin/*)
+    OTHER_LIBTOOL_OPT=""
+    ;;
+esac
+
+
+ARCH_RUN_32BIT=""
+AC_SUBST(LIBTOOL_CRUFT)
+case $ac_sys_system/$ac_sys_release in
+  Darwin/@<:@01567@:>@\..*) 
+    LIBTOOL_CRUFT="-framework System -lcc_dynamic"
+    if test "${enable_universalsdk}"; then
+	    :
+    else
+        LIBTOOL_CRUFT="${LIBTOOL_CRUFT} -arch_only `/usr/bin/arch`"
+    fi
+    LIBTOOL_CRUFT=$LIBTOOL_CRUFT' -install_name $(PYTHONFRAMEWORKINSTALLDIR)/Versions/$(VERSION)/$(PYTHONFRAMEWORK)'
+    LIBTOOL_CRUFT=$LIBTOOL_CRUFT' -compatibility_version $(VERSION) -current_version $(VERSION)';;
+  Darwin/*)
+    gcc_version=`gcc -dumpversion`
+    if test ${gcc_version} '<' 4.0
+        then
+            LIBTOOL_CRUFT="-lcc_dynamic"
+        else 
+            LIBTOOL_CRUFT=""
+    fi
+    AC_TRY_RUN([
+    #include <unistd.h>
+    int main(int argc, char*argv[])
+    {
+      if (sizeof(long) == 4) {
+    	  return 0;
+      } else {
+      	  return 1;
+      }
+    }
+    ], ac_osx_32bit=yes,
+       ac_osx_32bit=no,
+       ac_osx_32bit=yes)
+    
+    if test "${ac_osx_32bit}" = "yes"; then
+    	case `/usr/bin/arch` in
+    	i386) 
+    		MACOSX_DEFAULT_ARCH="i386" 
+    		;;
+    	ppc) 
+    		MACOSX_DEFAULT_ARCH="ppc" 
+    		;;
+    	*)
+    		AC_MSG_ERROR([Unexpected output of 'arch' on OSX])
+    		;;
+    	esac
+    else
+    	case `/usr/bin/arch` in
+    	i386) 
+    		MACOSX_DEFAULT_ARCH="x86_64" 
+    		;;
+    	ppc) 
+    		MACOSX_DEFAULT_ARCH="ppc64" 
+    		;;
+    	*)
+    		AC_MSG_ERROR([Unexpected output of 'arch' on OSX])
+    		;;
+    	esac
+
+	#ARCH_RUN_32BIT="true"
+    fi
+
+    LIBTOOL_CRUFT=$LIBTOOL_CRUFT" -lSystem -lSystemStubs -arch_only ${MACOSX_DEFAULT_ARCH}"
+    LIBTOOL_CRUFT=$LIBTOOL_CRUFT' -install_name $(PYTHONFRAMEWORKINSTALLDIR)/Versions/$(VERSION)/$(PYTHONFRAMEWORK)'
+    LIBTOOL_CRUFT=$LIBTOOL_CRUFT' -compatibility_version $(VERSION) -current_version $(VERSION)';;
+esac
+
+AC_MSG_CHECKING(for --enable-framework)
+if test "$enable_framework"
+then
+	BASECFLAGS="$BASECFLAGS -fno-common -dynamic"
+	# -F. is needed to allow linking to the framework while 
+	# in the build location.
+	AC_DEFINE(WITH_NEXT_FRAMEWORK, 1, 
+         [Define if you want to produce an OpenStep/Rhapsody framework
+         (shared library plus accessory files).])
+	AC_MSG_RESULT(yes)
+	if test $enable_shared = "yes"
+	then
+		AC_MSG_ERROR([Specifying both --enable-shared and --enable-framework is not supported, use only --enable-framework instead])
+	fi
+else
+	AC_MSG_RESULT(no)
+fi
+
+AC_MSG_CHECKING(for dyld)
+case $ac_sys_system/$ac_sys_release in
+  Darwin/*)
+  	AC_DEFINE(WITH_DYLD, 1, 
+        [Define if you want to use the new-style (Openstep, Rhapsody, MacOS)
+         dynamic linker (dyld) instead of the old-style (NextStep) dynamic
+         linker (rld). Dyld is necessary to support frameworks.])
+  	AC_MSG_RESULT(always on for Darwin)
+  	;;
+  *)
+	AC_MSG_RESULT(no)
+	;;
+esac
+
+# Set info about shared libraries.
+AC_SUBST(SO)
+AC_SUBST(LDSHARED)
+AC_SUBST(BLDSHARED)
+AC_SUBST(CCSHARED)
+AC_SUBST(LINKFORSHARED)
+# SO is the extension of shared libraries `(including the dot!)
+# -- usually .so, .sl on HP-UX, .dll on Cygwin
+AC_MSG_CHECKING(SO)
+if test -z "$SO"
+then
+	case $ac_sys_system in
+	hp*|HP*)
+		case `uname -m` in
+			ia64) SO=.so;;
+	  		*)    SO=.sl;;
+		esac
+		;;
+	CYGWIN*)   SO=.dll;;
+	*)	   SO=.so;;
+	esac
+else
+	# this might also be a termcap variable, see #610332
+        echo
+        echo '====================================================================='
+        echo '+                                                                   +'
+	echo '+ WARNING: You have set SO in your environment.                     +'
+        echo '+ Do you really mean to change the extension for shared libraries?  +'
+        echo '+ Continuing in 10 seconds to let you to ponder.                    +'
+        echo '+                                                                   +'
+        echo '====================================================================='
+	sleep 10
+fi
+AC_MSG_RESULT($SO)
+
+AC_DEFINE_UNQUOTED(SHLIB_EXT, "$SO", [Define this to be extension of shared libraries (including the dot!).])
+# LDSHARED is the ld *command* used to create shared library
+# -- "cc -G" on SunOS 5.x, "ld -shared" on IRIX 5
+# (Shared libraries in this instance are shared modules to be loaded into
+# Python, as opposed to building Python itself as a shared library.)
+AC_MSG_CHECKING(LDSHARED)
+if test -z "$LDSHARED"
+then
+	case $ac_sys_system/$ac_sys_release in
+	AIX*)
+		BLDSHARED="\$(srcdir)/Modules/ld_so_aix \$(CC) -bI:\$(srcdir)/Modules/python.exp"
+		LDSHARED="\$(BINLIBDEST)/config/ld_so_aix \$(CC) -bI:\$(BINLIBDEST)/config/python.exp"
+		;;
+	IRIX/5*) LDSHARED="ld -shared";;
+	IRIX*/6*) LDSHARED="ld ${SGI_ABI} -shared -all";;
+	SunOS/5*) 
+		if test "$GCC" = "yes"
+		then LDSHARED='$(CC) -shared $(LDFLAGS)'
+		else LDSHARED='$(CC) -G $(LDFLAGS)';
+		fi ;;
+	hp*|HP*)
+		if test "$GCC" = "yes"
+		then LDSHARED='$(CC) -shared'
+		else LDSHARED='ld -b';
+		fi ;;
+	OSF*) LDSHARED="ld -shared -expect_unresolved \"*\"";;
+	Darwin/1.3*)
+		LDSHARED='$(CC) $(LDFLAGS) -bundle'
+		if test "$enable_framework" ; then
+			# Link against the framework. All externals should be defined.
+			BLDSHARED="$LDSHARED "'$(PYTHONFRAMEWORKDIR)/Versions/$(VERSION)/$(PYTHONFRAMEWORK)'
+			LDSHARED="$LDSHARED "'$(PYTHONFRAMEWORKPREFIX)/$(PYTHONFRAMEWORKDIR)/Versions/$(VERSION)/$(PYTHONFRAMEWORK)'
+		else
+			# No framework. Ignore undefined symbols, assuming they come from Python
+			LDSHARED="$LDSHARED -undefined suppress"
+		fi ;;
+	Darwin/1.4*|Darwin/5.*|Darwin/6.*)
+		LDSHARED='$(CC) $(LDFLAGS) -bundle'
+		if test "$enable_framework" ; then
+			# Link against the framework. All externals should be defined.
+			BLDSHARED="$LDSHARED "'$(PYTHONFRAMEWORKDIR)/Versions/$(VERSION)/$(PYTHONFRAMEWORK)'
+			LDSHARED="$LDSHARED "'$(PYTHONFRAMEWORKPREFIX)/$(PYTHONFRAMEWORKDIR)/Versions/$(VERSION)/$(PYTHONFRAMEWORK)'
+		else
+			# No framework, use the Python app as bundle-loader
+			BLDSHARED="$LDSHARED "'-bundle_loader $(BUILDPYTHON)'
+			LDSHARED="$LDSHARED "'-bundle_loader $(BINDIR)/python$(VERSION)$(EXE)'
+		fi ;;
+	Darwin/*)
+		# Use -undefined dynamic_lookup whenever possible (10.3 and later).
+		# This allows an extension to be used in any Python
+
+		if test ${MACOSX_DEPLOYMENT_TARGET} '>' 10.2
+		then
+			if test "${enable_universalsdk}"; then
+				LDFLAGS="${UNIVERSAL_ARCH_FLAGS} -isysroot ${UNIVERSALSDK} ${LDFLAGS}"
+			fi
+			LDSHARED='$(CC) $(LDFLAGS) -bundle -undefined dynamic_lookup'
+			BLDSHARED="$LDSHARED"
+		else
+			LDSHARED='$(CC) $(LDFLAGS) -bundle'
+			if test "$enable_framework" ; then
+				# Link against the framework. All externals should be defined.
+				BLDSHARED="$LDSHARED "'$(PYTHONFRAMEWORKDIR)/Versions/$(VERSION)/$(PYTHONFRAMEWORK)'
+				LDSHARED="$LDSHARED "'$(PYTHONFRAMEWORKPREFIX)/$(PYTHONFRAMEWORKDIR)/Versions/$(VERSION)/$(PYTHONFRAMEWORK)'
+			else
+				# No framework, use the Python app as bundle-loader
+				BLDSHARED="$LDSHARED "'-bundle_loader $(BUILDPYTHON)'
+				LDSHARED="$LDSHARED "'-bundle_loader $(BINDIR)/python$(VERSION)$(EXE)'
+			fi
+		fi
+		;;
+	Linux*|GNU*|QNX*) LDSHARED='$(CC) -shared';;
+	BSD/OS*/4*) LDSHARED="gcc -shared";;
+	FreeBSD*)
+		if [[ "`$CC -dM -E - </dev/null | grep __ELF__`" != "" ]]
+		then
+			LDSHARED='$(CC) -shared ${LDFLAGS}'
+		else
+			LDSHARED="ld -Bshareable ${LDFLAGS}"
+		fi;;
+	OpenBSD*)
+		if [[ "`$CC -dM -E - </dev/null | grep __ELF__`" != "" ]]
+		then
+				LDSHARED='$(CC) -shared $(CCSHARED) ${LDFLAGS}'
+		else
+				case `uname -r` in
+				[[01]].* | 2.[[0-7]] | 2.[[0-7]].*)
+				   LDSHARED="ld -Bshareable ${LDFLAGS}"
+				   ;;
+				*)
+				   LDSHARED='$(CC) -shared $(CCSHARED) ${LDFLAGS}'
+				   ;;
+				esac
+		fi;;
+	NetBSD*|DragonFly*) LDSHARED='$(CC) -shared ${LDFLAGS}';;
+	OpenUNIX*|UnixWare*)
+		if test "$GCC" = "yes"
+		then LDSHARED='$(CC) -shared'
+		else LDSHARED='$(CC) -G'
+		fi;;
+	SCO_SV*) LDSHARED='$(CC) -Wl,-G,-Bexport';;
+	CYGWIN*) LDSHARED="gcc -shared -Wl,--enable-auto-image-base";;
+	atheos*) LDSHARED="gcc -shared";;
+	*)	LDSHARED="ld";;
+	esac
+fi
+AC_MSG_RESULT($LDSHARED)
+BLDSHARED=${BLDSHARED-$LDSHARED}
+# CCSHARED are the C *flags* used to create objects to go into a shared
+# library (module) -- this is only needed for a few systems
+AC_MSG_CHECKING(CCSHARED)
+if test -z "$CCSHARED"
+then
+	case $ac_sys_system/$ac_sys_release in
+	SunOS*) if test "$GCC" = yes;
+		then CCSHARED="-fPIC";
+		elif test `uname -p` = sparc;
+		then CCSHARED="-xcode=pic32";
+		else CCSHARED="-Kpic";
+		fi;;
+	hp*|HP*) if test "$GCC" = yes;
+		 then CCSHARED="-fPIC";
+		 else CCSHARED="+z";
+		 fi;;
+	Linux*|GNU*) CCSHARED="-fPIC";;
+	BSD/OS*/4*) CCSHARED="-fpic";;
+	FreeBSD*|NetBSD*|OpenBSD*|DragonFly*) CCSHARED="-fPIC";;
+	OpenUNIX*|UnixWare*)
+		if test "$GCC" = "yes"
+		then CCSHARED="-fPIC"
+		else CCSHARED="-KPIC"
+		fi;;
+	SCO_SV*)
+		if test "$GCC" = "yes"
+		then CCSHARED="-fPIC"
+		else CCSHARED="-Kpic -belf"
+		fi;;
+	IRIX*/6*)  case $CC in
+		   *gcc*) CCSHARED="-shared";;
+		   *) CCSHARED="";;
+		   esac;;
+	atheos*) CCSHARED="-fPIC";;
+	esac
+fi
+AC_MSG_RESULT($CCSHARED)
+# LINKFORSHARED are the flags passed to the $(CC) command that links
+# the python executable -- this is only needed for a few systems
+AC_MSG_CHECKING(LINKFORSHARED)
+if test -z "$LINKFORSHARED"
+then
+	case $ac_sys_system/$ac_sys_release in
+	AIX*)	LINKFORSHARED='-Wl,-bE:Modules/python.exp -lld';;
+	hp*|HP*)
+	    LINKFORSHARED="-Wl,-E -Wl,+s";;
+#	    LINKFORSHARED="-Wl,-E -Wl,+s -Wl,+b\$(BINLIBDEST)/lib-dynload";;
+	BSD/OS/4*) LINKFORSHARED="-Xlinker -export-dynamic";;
+	Linux*|GNU*) LINKFORSHARED="-Xlinker -export-dynamic";;
+	# -u libsys_s pulls in all symbols in libsys
+	Darwin/*) 
+		LINKFORSHARED="$extra_undefs -framework CoreFoundation"
+		if test "$enable_framework"
+		then
+			LINKFORSHARED="$LINKFORSHARED "'$(PYTHONFRAMEWORKDIR)/Versions/$(VERSION)/$(PYTHONFRAMEWORK)'
+		fi
+		LINKFORSHARED="$LINKFORSHARED";;
+	OpenUNIX*|UnixWare*) LINKFORSHARED="-Wl,-Bexport";;
+	SCO_SV*) LINKFORSHARED="-Wl,-Bexport";;
+	ReliantUNIX*) LINKFORSHARED="-W1 -Blargedynsym";;
+	FreeBSD*|NetBSD*|OpenBSD*|DragonFly*) 
+		if [[ "`$CC -dM -E - </dev/null | grep __ELF__`" != "" ]]
+		then
+			LINKFORSHARED="-Wl,--export-dynamic"
+		fi;;
+	SunOS/5*) case $CC in
+		  *gcc*)
+		    if $CC -Xlinker --help 2>&1 | grep export-dynamic >/dev/null
+		    then
+			LINKFORSHARED="-Xlinker --export-dynamic"
+		    fi;;
+		  esac;;
+	CYGWIN*)
+		if test $enable_shared = "no"
+		then
+			LINKFORSHARED='-Wl,--out-implib=$(LDLIBRARY)'
+		fi;;
+	QNX*)
+		# -Wl,-E causes the symbols to be added to the dynamic
+		# symbol table so that they can be found when a module
+		# is loaded.  -N 2048K causes the stack size to be set
+		# to 2048 kilobytes so that the stack doesn't overflow
+		# when running test_compile.py.
+		LINKFORSHARED='-Wl,-E -N 2048K';;
+	esac
+fi
+AC_MSG_RESULT($LINKFORSHARED)
+
+
+AC_SUBST(CFLAGSFORSHARED)
+AC_MSG_CHECKING(CFLAGSFORSHARED)
+if test ! "$LIBRARY" = "$LDLIBRARY"
+then
+	case $ac_sys_system in
+	CYGWIN*)
+		# Cygwin needs CCSHARED when building extension DLLs
+		# but not when building the interpreter DLL.
+		CFLAGSFORSHARED='';;
+	*)
+		CFLAGSFORSHARED='$(CCSHARED)'
+	esac
+fi
+AC_MSG_RESULT($CFLAGSFORSHARED)
+
+# SHLIBS are libraries (except -lc and -lm) to link to the python shared
+# library (with --enable-shared).
+# For platforms on which shared libraries are not allowed to have unresolved
+# symbols, this must be set to $(LIBS) (expanded by make). We do this even
+# if it is not required, since it creates a dependency of the shared library
+# to LIBS. This, in turn, means that applications linking the shared libpython
+# don't need to link LIBS explicitly. The default should be only changed
+# on systems where this approach causes problems.
+AC_SUBST(SHLIBS)
+AC_MSG_CHECKING(SHLIBS)
+case "$ac_sys_system" in
+	*)
+		SHLIBS='$(LIBS)';;
+esac
+AC_MSG_RESULT($SHLIBS)
+
+
+# checks for libraries
+AC_CHECK_LIB(dl, dlopen)	# Dynamic linking for SunOS/Solaris and SYSV
+AC_CHECK_LIB(dld, shl_load)	# Dynamic linking for HP-UX
+
+# only check for sem_init if thread support is requested
+if test "$with_threads" = "yes" -o -z "$with_threads"; then
+    AC_SEARCH_LIBS(sem_init, pthread rt posix4) # 'Real Time' functions on Solaris
+						# posix4 on Solaris 2.6
+						# pthread (first!) on Linux
+fi
+
+# check if we need libintl for locale functions
+AC_CHECK_LIB(intl, textdomain,
+	[AC_DEFINE(WITH_LIBINTL, 1,
+	[Define to 1 if libintl is needed for locale functions.])
+        LIBS="-lintl $LIBS"])
+
+# checks for system dependent C++ extensions support
+case "$ac_sys_system" in
+	AIX*)	AC_MSG_CHECKING(for genuine AIX C++ extensions support)
+		AC_TRY_LINK([#include <load.h>],
+			    [loadAndInit("", 0, "")],
+			    [AC_DEFINE(AIX_GENUINE_CPLUSPLUS, 1,
+                      [Define for AIX if your compiler is a genuine IBM xlC/xlC_r
+                       and you want support for AIX C++ shared extension modules.])
+			     AC_MSG_RESULT(yes)],
+			    [AC_MSG_RESULT(no)]);;
+	*) ;;
+esac
+
+# Most SVR4 platforms (e.g. Solaris) need -lsocket and -lnsl.
+AC_CHECK_LIB(nsl, t_open, [LIBS="-lnsl $LIBS"]) # SVR4
+AC_CHECK_LIB(socket, socket, [LIBS="-lsocket $LIBS"], [], $LIBS) # SVR4 sockets
+
+AC_MSG_CHECKING(for --with-libs)
+AC_ARG_WITH(libs,
+            AC_HELP_STRING(--with-libs='lib1 ...', link against additional libs),
+[
+AC_MSG_RESULT($withval)
+LIBS="$withval $LIBS"
+],
+[AC_MSG_RESULT(no)])
+
+# Check for use of the system libffi library
+AC_MSG_CHECKING(for --with-system-ffi)
+AC_ARG_WITH(system_ffi,
+            AC_HELP_STRING(--with-system-ffi, build _ctypes module using an installed ffi library),
+            [],
+            [with_system_ffi="no"])
+
+AC_MSG_RESULT($with_system_ffi)
+
+# Check for --with-dbmliborder
+AC_MSG_CHECKING(for --with-dbmliborder)
+AC_ARG_WITH(dbmliborder,
+            AC_HELP_STRING([--with-dbmliborder=db1:db2:...], [order to check db backends for dbm. Valid value is a colon separated string with the backend names `ndbm', `gdbm' and `bdb'.]),
+[
+if test x$with_dbmliborder = xyes
+then
+AC_MSG_ERROR([proper usage is --with-dbmliborder=db1:db2:...])
+else
+  for db in `echo $with_dbmliborder | sed 's/:/ /g'`; do
+    if test x$db != xndbm && test x$db != xgdbm && test x$db != xbdb
+    then
+      AC_MSG_ERROR([proper usage is --with-dbmliborder=db1:db2:...])
+    fi
+  done
+fi])
+AC_MSG_RESULT($with_dbmliborder)
+
+# Determine if signalmodule should be used.
+AC_SUBST(USE_SIGNAL_MODULE)
+AC_SUBST(SIGNAL_OBJS)
+AC_MSG_CHECKING(for --with-signal-module)
+AC_ARG_WITH(signal-module,
+            AC_HELP_STRING(--with-signal-module, disable/enable signal module))
+
+if test -z "$with_signal_module"
+then with_signal_module="yes"
+fi
+AC_MSG_RESULT($with_signal_module)
+
+if test "${with_signal_module}" = "yes"; then
+	USE_SIGNAL_MODULE=""
+	SIGNAL_OBJS=""
+else
+	USE_SIGNAL_MODULE="#"
+	SIGNAL_OBJS="Parser/intrcheck.o Python/sigcheck.o"
+fi
+
+# This is used to generate Setup.config
+AC_SUBST(USE_THREAD_MODULE)
+USE_THREAD_MODULE=""
+
+AC_MSG_CHECKING(for --with-dec-threads)
+AC_SUBST(LDLAST)
+AC_ARG_WITH(dec-threads,
+            AC_HELP_STRING(--with-dec-threads, use DEC Alpha/OSF1 thread-safe libraries),
+[
+AC_MSG_RESULT($withval)
+LDLAST=-threads
+if test "${with_thread+set}" != set; then
+   with_thread="$withval";
+fi],
+[AC_MSG_RESULT(no)])
+
+# Templates for things AC_DEFINEd more than once.
+# For a single AC_DEFINE, no template is needed.
+AH_TEMPLATE(C_THREADS,[Define if you have the Mach cthreads package])
+AH_TEMPLATE(_REENTRANT,
+  [Define to force use of thread-safe errno, h_errno, and other functions])
+AH_TEMPLATE(WITH_THREAD,
+  [Define if you want to compile in rudimentary thread support])
+
+AC_MSG_CHECKING(for --with-threads)
+dnl quadrigraphs "@<:@" and "@:>@" produce "[" and "]" in the output
+AC_ARG_WITH(threads,
+            AC_HELP_STRING(--with(out)-threads@<:@=DIRECTORY@:>@, disable/enable thread support))
+
+# --with-thread is deprecated, but check for it anyway
+dnl quadrigraphs "@<:@" and "@:>@" produce "[" and "]" in the output
+AC_ARG_WITH(thread,
+            AC_HELP_STRING(--with(out)-thread@<:@=DIRECTORY@:>@, deprecated; use --with(out)-threads),
+            [with_threads=$with_thread])
+
+if test -z "$with_threads"
+then with_threads="yes"
+fi
+AC_MSG_RESULT($with_threads)
+
+AC_SUBST(THREADOBJ)
+if test "$with_threads" = "no"
+then
+    USE_THREAD_MODULE="#"
+elif test "$ac_cv_pthread_is_default" = yes
+then
+    AC_DEFINE(WITH_THREAD)
+    # Defining _REENTRANT on system with POSIX threads should not hurt.
+    AC_DEFINE(_REENTRANT)
+    posix_threads=yes
+    THREADOBJ="Python/thread.o"    
+elif test "$ac_cv_kpthread" = "yes"
+then
+    CC="$CC -Kpthread"
+    if test "$ac_cv_cxx_thread" = "yes"; then
+        CXX="$CXX -Kpthread"
+    fi
+    AC_DEFINE(WITH_THREAD)
+    posix_threads=yes
+    THREADOBJ="Python/thread.o"
+elif test "$ac_cv_kthread" = "yes"
+then
+    CC="$CC -Kthread"
+    if test "$ac_cv_cxx_thread" = "yes"; then
+        CXX="$CXX -Kthread"
+    fi
+    AC_DEFINE(WITH_THREAD)
+    posix_threads=yes
+    THREADOBJ="Python/thread.o"
+elif test "$ac_cv_pthread" = "yes"
+then
+    CC="$CC -pthread"
+    if test "$ac_cv_cxx_thread" = "yes"; then
+        CXX="$CXX -pthread"
+    fi
+    AC_DEFINE(WITH_THREAD)
+    posix_threads=yes
+    THREADOBJ="Python/thread.o"
+else
+    if test ! -z "$with_threads" -a -d "$with_threads"
+    then LDFLAGS="$LDFLAGS -L$with_threads"
+    fi
+    if test ! -z "$withval" -a -d "$withval"
+    then LDFLAGS="$LDFLAGS -L$withval"
+    fi
+
+    # According to the POSIX spec, a pthreads implementation must
+    # define _POSIX_THREADS in unistd.h. Some apparently don't
+    # (e.g. gnu pth with pthread emulation)
+    AC_MSG_CHECKING(for _POSIX_THREADS in unistd.h)
+    AC_EGREP_CPP(yes,
+    [
+#include <unistd.h>
+#ifdef _POSIX_THREADS
+yes
+#endif
+    ], unistd_defines_pthreads=yes, unistd_defines_pthreads=no)
+    AC_MSG_RESULT($unistd_defines_pthreads)
+
+    AC_DEFINE(_REENTRANT)
+    AC_CHECK_HEADER(cthreads.h, [AC_DEFINE(WITH_THREAD)
+    AC_DEFINE(C_THREADS)
+    AC_DEFINE(HURD_C_THREADS, 1,
+    [Define if you are using Mach cthreads directly under /include])
+    LIBS="$LIBS -lthreads"
+    THREADOBJ="Python/thread.o"],[
+    AC_CHECK_HEADER(mach/cthreads.h, [AC_DEFINE(WITH_THREAD)
+    AC_DEFINE(C_THREADS)
+    AC_DEFINE(MACH_C_THREADS, 1,
+    [Define if you are using Mach cthreads under mach /])
+    THREADOBJ="Python/thread.o"],[
+    AC_MSG_CHECKING(for --with-pth)
+    AC_ARG_WITH([pth],
+                AC_HELP_STRING(--with-pth, use GNU pth threading libraries),
+                [AC_MSG_RESULT($withval)
+                  AC_DEFINE([WITH_THREAD])
+                  AC_DEFINE([HAVE_PTH], 1,
+                            [Define if you have GNU PTH threads.])
+                  LIBS="-lpth $LIBS"
+                  THREADOBJ="Python/thread.o"],
+	        [AC_MSG_RESULT(no)
+
+    # Just looking for pthread_create in libpthread is not enough:
+    # on HP/UX, pthread.h renames pthread_create to a different symbol name.
+    # So we really have to include pthread.h, and then link.
+    _libs=$LIBS
+    LIBS="$LIBS -lpthread"
+    AC_MSG_CHECKING([for pthread_create in -lpthread])
+    AC_TRY_LINK([#include <pthread.h>
+
+void * start_routine (void *arg) { exit (0); }], [
+pthread_create (NULL, NULL, start_routine, NULL)], [
+    AC_MSG_RESULT(yes)
+    AC_DEFINE(WITH_THREAD)
+    posix_threads=yes
+    THREADOBJ="Python/thread.o"],[
+    LIBS=$_libs
+    AC_CHECK_FUNC(pthread_detach, [AC_DEFINE(WITH_THREAD)
+    posix_threads=yes
+    THREADOBJ="Python/thread.o"],[
+    AC_CHECK_HEADER(atheos/threads.h, [AC_DEFINE(WITH_THREAD)
+    AC_DEFINE(ATHEOS_THREADS, 1,
+    [Define this if you have AtheOS threads.])
+    THREADOBJ="Python/thread.o"],[
+    AC_CHECK_LIB(pthreads, pthread_create, [AC_DEFINE(WITH_THREAD)
+    posix_threads=yes
+    LIBS="$LIBS -lpthreads"
+    THREADOBJ="Python/thread.o"], [
+    AC_CHECK_LIB(c_r, pthread_create, [AC_DEFINE(WITH_THREAD)
+    posix_threads=yes
+    LIBS="$LIBS -lc_r"
+    THREADOBJ="Python/thread.o"], [
+    AC_CHECK_LIB(pthread, __pthread_create_system, [AC_DEFINE(WITH_THREAD)
+    posix_threads=yes
+    LIBS="$LIBS -lpthread"
+    THREADOBJ="Python/thread.o"], [
+    AC_CHECK_LIB(cma, pthread_create, [AC_DEFINE(WITH_THREAD)
+    posix_threads=yes
+    LIBS="$LIBS -lcma"
+    THREADOBJ="Python/thread.o"],[
+    USE_THREAD_MODULE="#"])
+    ])])])])])])])])])
+
+    AC_CHECK_LIB(mpc, usconfig, [AC_DEFINE(WITH_THREAD)
+    LIBS="$LIBS -lmpc"
+    THREADOBJ="Python/thread.o"
+    USE_THREAD_MODULE=""])
+
+    if test "$posix_threads" != "yes"; then     
+      AC_CHECK_LIB(thread, thr_create, [AC_DEFINE(WITH_THREAD)
+      LIBS="$LIBS -lthread"
+      THREADOBJ="Python/thread.o"
+      USE_THREAD_MODULE=""])
+    fi
+
+    if test "$USE_THREAD_MODULE" != "#"
+    then
+        # If the above checks didn't disable threads, (at least) OSF1
+        # needs this '-threads' argument during linking.
+        case $ac_sys_system in
+        OSF1) LDLAST=-threads;;
+        esac
+    fi
+fi
+
+if test "$posix_threads" = "yes"; then
+      if test "$unistd_defines_pthreads" = "no"; then
+         AC_DEFINE(_POSIX_THREADS, 1,
+         [Define if you have POSIX threads, 
+          and your system does not define that.])
+      fi
+
+      # Bug 662787: Using semaphores causes unexplicable hangs on Solaris 8.
+      case  $ac_sys_system/$ac_sys_release in
+  SunOS/5.6) AC_DEFINE(HAVE_PTHREAD_DESTRUCTOR, 1,
+                       Defined for Solaris 2.6 bug in pthread header.)
+		       ;;
+      SunOS/5.8) AC_DEFINE(HAVE_BROKEN_POSIX_SEMAPHORES, 1,
+		       Define if the Posix semaphores do not work on your system)
+		       ;;
+      AIX/5) AC_DEFINE(HAVE_BROKEN_POSIX_SEMAPHORES, 1,
+		       Define if the Posix semaphores do not work on your system)
+		       ;;
+      AIX/6) AC_DEFINE(HAVE_BROKEN_POSIX_SEMAPHORES, 1,
+                      Define if the Posix semaphores do not work on your system)
+                      ;;
+      esac
+
+      AC_MSG_CHECKING(if PTHREAD_SCOPE_SYSTEM is supported)
+      AC_CACHE_VAL(ac_cv_pthread_system_supported,
+      [AC_TRY_RUN([#include <pthread.h>
+      void *foo(void *parm) {
+        return NULL;
+      }
+      main() {
+        pthread_attr_t attr;
+        pthread_t id;
+        if (pthread_attr_init(&attr)) exit(-1);
+        if (pthread_attr_setscope(&attr, PTHREAD_SCOPE_SYSTEM)) exit(-1);
+        if (pthread_create(&id, &attr, foo, NULL)) exit(-1);
+        exit(0);
+      }],
+      ac_cv_pthread_system_supported=yes,
+      ac_cv_pthread_system_supported=no,
+      ac_cv_pthread_system_supported=no)
+      ])
+      AC_MSG_RESULT($ac_cv_pthread_system_supported)
+      if test "$ac_cv_pthread_system_supported" = "yes"; then
+        AC_DEFINE(PTHREAD_SYSTEM_SCHED_SUPPORTED, 1, [Defined if PTHREAD_SCOPE_SYSTEM supported.])
+      fi
+      AC_CHECK_FUNCS(pthread_sigmask,
+        [case $ac_sys_system in
+        CYGWIN*)
+          AC_DEFINE(HAVE_BROKEN_PTHREAD_SIGMASK, 1,
+            [Define if pthread_sigmask() does not work on your system.])
+            ;;
+        esac])
+fi
+
+
+# Check for enable-ipv6
+AH_TEMPLATE(ENABLE_IPV6, [Define if --enable-ipv6 is specified])
+AC_MSG_CHECKING([if --enable-ipv6 is specified])
+AC_ARG_ENABLE(ipv6,
+[  --enable-ipv6           Enable ipv6 (with ipv4) support
+  --disable-ipv6          Disable ipv6 support],
+[ case "$enableval" in
+  no)
+       AC_MSG_RESULT(no)
+       ipv6=no
+       ;;
+  *)   AC_MSG_RESULT(yes)
+       AC_DEFINE(ENABLE_IPV6)
+       ipv6=yes
+       ;;
+  esac ],
+
+[
+dnl the check does not work on cross compilation case...
+  AC_TRY_RUN([ /* AF_INET6 available check */
+#include <sys/types.h>
+#include <sys/socket.h>
+main()
+{
+ if (socket(AF_INET6, SOCK_STREAM, 0) < 0)
+   exit(1);
+ else
+   exit(0);
+}
+],
+  AC_MSG_RESULT(yes)
+  ipv6=yes,
+  AC_MSG_RESULT(no)
+  ipv6=no,
+  AC_MSG_RESULT(no)
+  ipv6=no
+)
+
+if test "$ipv6" = "yes"; then
+	AC_MSG_CHECKING(if RFC2553 API is available)
+	AC_TRY_COMPILE([#include <sys/types.h>
+#include <netinet/in.h>],
+	[struct sockaddr_in6 x;
+x.sin6_scope_id;],
+		AC_MSG_RESULT(yes)
+		ipv6=yes,
+		AC_MSG_RESULT(no, IPv6 disabled)
+		ipv6=no)
+fi
+
+if test "$ipv6" = "yes"; then
+	AC_DEFINE(ENABLE_IPV6)
+fi
+])
+
+ipv6type=unknown
+ipv6lib=none
+ipv6trylibc=no
+
+if test "$ipv6" = "yes"; then
+	AC_MSG_CHECKING([ipv6 stack type])
+	for i in inria kame linux-glibc linux-inet6 solaris toshiba v6d zeta;
+	do
+		case $i in
+		inria)
+			dnl http://www.kame.net/
+			AC_EGREP_CPP(yes, [
+#include <netinet/in.h>
+#ifdef IPV6_INRIA_VERSION
+yes
+#endif],
+				[ipv6type=$i])
+			;;
+		kame)
+			dnl http://www.kame.net/
+			AC_EGREP_CPP(yes, [
+#include <netinet/in.h>
+#ifdef __KAME__
+yes
+#endif],
+				[ipv6type=$i;
+				ipv6lib=inet6
+				ipv6libdir=/usr/local/v6/lib
+				ipv6trylibc=yes])
+			;;
+		linux-glibc)
+			dnl http://www.v6.linux.or.jp/
+			AC_EGREP_CPP(yes, [
+#include <features.h>
+#if defined(__GLIBC__) && ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 1) || (__GLIBC__ > 2))
+yes
+#endif],
+				[ipv6type=$i;
+				ipv6trylibc=yes])
+			;;
+		linux-inet6)
+			dnl http://www.v6.linux.or.jp/
+			if test -d /usr/inet6; then
+				ipv6type=$i
+				ipv6lib=inet6
+				ipv6libdir=/usr/inet6/lib
+				BASECFLAGS="-I/usr/inet6/include $BASECFLAGS"
+			fi
+			;;
+		solaris)
+			if test -f /etc/netconfig; then
+                          if $GREP -q tcp6 /etc/netconfig; then
+				ipv6type=$i
+				ipv6trylibc=yes
+                          fi
+                        fi
+			;;
+		toshiba)
+			AC_EGREP_CPP(yes, [
+#include <sys/param.h>
+#ifdef _TOSHIBA_INET6
+yes
+#endif],
+				[ipv6type=$i;
+				ipv6lib=inet6;
+				ipv6libdir=/usr/local/v6/lib])
+			;;
+		v6d)
+			AC_EGREP_CPP(yes, [
+#include </usr/local/v6/include/sys/v6config.h>
+#ifdef __V6D__
+yes
+#endif],
+				[ipv6type=$i;
+				ipv6lib=v6;
+				ipv6libdir=/usr/local/v6/lib;
+				BASECFLAGS="-I/usr/local/v6/include $BASECFLAGS"])
+			;;
+		zeta)
+			AC_EGREP_CPP(yes, [
+#include <sys/param.h>
+#ifdef _ZETA_MINAMI_INET6
+yes
+#endif],
+				[ipv6type=$i;
+				ipv6lib=inet6;
+				ipv6libdir=/usr/local/v6/lib])
+			;;
+		esac
+		if test "$ipv6type" != "unknown"; then
+			break
+		fi
+	done
+	AC_MSG_RESULT($ipv6type)
+fi
+
+if test "$ipv6" = "yes" -a "$ipv6lib" != "none"; then
+	if test -d $ipv6libdir -a -f $ipv6libdir/lib$ipv6lib.a; then
+		LIBS="-L$ipv6libdir -l$ipv6lib $LIBS"
+		echo "using lib$ipv6lib"
+	else
+		if test $ipv6trylibc = "yes"; then
+			echo "using libc"
+		else
+			echo 'Fatal: no $ipv6lib library found.  cannot continue.'
+			echo "You need to fetch lib$ipv6lib.a from appropriate"
+			echo 'ipv6 kit and compile beforehand.'
+			exit 1
+		fi
+	fi
+fi
+
+AC_MSG_CHECKING(for OSX 10.5 SDK or later)
+AC_TRY_COMPILE([#include <Carbon/Carbon.h>], FSIORefNum fRef = 0,
+  AC_DEFINE(HAVE_OSX105_SDK, 1, Define if compiling using MacOS X 10.5 SDK or later.)
+  AC_MSG_RESULT(yes),
+  AC_MSG_RESULT(no)
+)
+
+# Check for --with-doc-strings
+AC_MSG_CHECKING(for --with-doc-strings)
+AC_ARG_WITH(doc-strings,
+            AC_HELP_STRING(--with(out)-doc-strings, disable/enable documentation strings))
+
+if test -z "$with_doc_strings"
+then with_doc_strings="yes"
+fi
+if test "$with_doc_strings" != "no"
+then
+    AC_DEFINE(WITH_DOC_STRINGS, 1,
+      [Define if you want documentation strings in extension modules])
+fi
+AC_MSG_RESULT($with_doc_strings)
+
+# Check if eval loop should use timestamp counter profiling
+AC_MSG_CHECKING(for --with-tsc)
+AC_ARG_WITH(tsc,
+[  --with(out)-tsc         enable/disable timestamp counter profile], [
+if test "$withval" != no
+then 
+  AC_DEFINE(WITH_TSC, 1, 
+    [Define to profile with the Pentium timestamp counter]) 
+    AC_MSG_RESULT(yes)
+else AC_MSG_RESULT(no)
+fi],
+[AC_MSG_RESULT(no)])
+
+# Check for Python-specific malloc support
+AC_MSG_CHECKING(for --with-pymalloc)
+AC_ARG_WITH(pymalloc,
+            AC_HELP_STRING(--with(out)-pymalloc, disable/enable specialized mallocs))
+
+if test -z "$with_pymalloc"
+then with_pymalloc="yes"
+fi
+if test "$with_pymalloc" != "no"
+then
+    AC_DEFINE(WITH_PYMALLOC, 1, 
+     [Define if you want to compile in Python-specific mallocs])
+fi
+AC_MSG_RESULT($with_pymalloc)
+
+# Check for --with-wctype-functions
+AC_MSG_CHECKING(for --with-wctype-functions)
+AC_ARG_WITH(wctype-functions, 
+            AC_HELP_STRING(--with-wctype-functions, use wctype.h functions),
+[
+if test "$withval" != no
+then 
+  AC_DEFINE(WANT_WCTYPE_FUNCTIONS, 1,
+  [Define if you want wctype.h functions to be used instead of the
+   one supplied by Python itself. (see Include/unicodectype.h).]) 
+  AC_MSG_RESULT(yes)
+else AC_MSG_RESULT(no)
+fi],
+[AC_MSG_RESULT(no)])
+
+# -I${DLINCLDIR} is added to the compile rule for importdl.o
+AC_SUBST(DLINCLDIR)
+DLINCLDIR=.
+
+# the dlopen() function means we might want to use dynload_shlib.o. some
+# platforms, such as AIX, have dlopen(), but don't want to use it.
+AC_CHECK_FUNCS(dlopen)
+
+# DYNLOADFILE specifies which dynload_*.o file we will use for dynamic
+# loading of modules.
+AC_SUBST(DYNLOADFILE)
+AC_MSG_CHECKING(DYNLOADFILE)
+if test -z "$DYNLOADFILE"
+then
+	case $ac_sys_system/$ac_sys_release in
+	AIX*) # Use dynload_shlib.c and dlopen() if we have it; otherwise dynload_aix.c
+	if test "$ac_cv_func_dlopen" = yes
+	then DYNLOADFILE="dynload_shlib.o"
+	else DYNLOADFILE="dynload_aix.o"
+	fi
+	;;
+	hp*|HP*) DYNLOADFILE="dynload_hpux.o";;
+	# Use dynload_next.c only on 10.2 and below, which don't have native dlopen()
+	Darwin/@<:@0156@:>@\..*) DYNLOADFILE="dynload_next.o";;
+	atheos*) DYNLOADFILE="dynload_atheos.o";;
+	*)
+	# use dynload_shlib.c and dlopen() if we have it; otherwise stub
+	# out any dynamic loading
+	if test "$ac_cv_func_dlopen" = yes
+	then DYNLOADFILE="dynload_shlib.o"
+	else DYNLOADFILE="dynload_stub.o"
+	fi
+	;;
+	esac
+fi
+AC_MSG_RESULT($DYNLOADFILE)
+if test "$DYNLOADFILE" != "dynload_stub.o"
+then
+	AC_DEFINE(HAVE_DYNAMIC_LOADING, 1,
+        [Defined when any dynamic module loading is enabled.])
+fi
+
+# MACHDEP_OBJS can be set to platform-specific object files needed by Python
+
+AC_SUBST(MACHDEP_OBJS)
+AC_MSG_CHECKING(MACHDEP_OBJS)
+if test -z "$MACHDEP_OBJS"
+then
+	MACHDEP_OBJS=$extra_machdep_objs
+else
+	MACHDEP_OBJS="$MACHDEP_OBJS $extra_machdep_objs"
+fi
+AC_MSG_RESULT(MACHDEP_OBJS)
+
+# checks for library functions
+AC_CHECK_FUNCS(alarm setitimer getitimer bind_textdomain_codeset chown \
+ clock confstr ctermid execv fchmod fchown fork fpathconf ftime ftruncate \
+ gai_strerror getgroups getlogin getloadavg getpeername getpgid getpid \
+ getpriority getpwent getspnam getspent getsid getwd \
+ kill killpg lchmod lchown lstat mbrtowc mkfifo mknod mktime \
+ mremap nice pathconf pause plock poll pthread_init \
+ putenv readlink realpath \
+ select sem_open sem_timedwait sem_getvalue sem_unlink setegid seteuid \
+ setgid \
+ setlocale setregid setreuid setsid setpgid setpgrp setuid setvbuf snprintf \
+ sigaction siginterrupt sigrelse strftime strlcpy \
+ sysconf tcgetpgrp tcsetpgrp tempnam timegm times tmpfile tmpnam tmpnam_r \
+ truncate uname unsetenv utimes waitpid wait3 wait4 \
+ wcscoll wcsftime wcsxfrm _getpty)
+
+# For some functions, having a definition is not sufficient, since
+# we want to take their address.
+AC_MSG_CHECKING(for chroot)
+AC_TRY_COMPILE([#include <unistd.h>], void *x=chroot,
+  AC_DEFINE(HAVE_CHROOT, 1, Define if you have the 'chroot' function.)
+  AC_MSG_RESULT(yes),
+  AC_MSG_RESULT(no)
+)
+AC_MSG_CHECKING(for link)
+AC_TRY_COMPILE([#include <unistd.h>], void *x=link,
+  AC_DEFINE(HAVE_LINK, 1, Define if you have the 'link' function.)
+  AC_MSG_RESULT(yes),
+  AC_MSG_RESULT(no)
+)
+AC_MSG_CHECKING(for symlink)
+AC_TRY_COMPILE([#include <unistd.h>], void *x=symlink,
+  AC_DEFINE(HAVE_SYMLINK, 1, Define if you have the 'symlink' function.)
+  AC_MSG_RESULT(yes),
+  AC_MSG_RESULT(no)
+)
+AC_MSG_CHECKING(for fchdir)
+AC_TRY_COMPILE([#include <unistd.h>], void *x=fchdir,
+  AC_DEFINE(HAVE_FCHDIR, 1, Define if you have the 'fchdir' function.)
+  AC_MSG_RESULT(yes),
+  AC_MSG_RESULT(no)
+)
+AC_MSG_CHECKING(for fsync)
+AC_TRY_COMPILE([#include <unistd.h>], void *x=fsync,
+  AC_DEFINE(HAVE_FSYNC, 1, Define if you have the 'fsync' function.)
+  AC_MSG_RESULT(yes),
+  AC_MSG_RESULT(no)
+)
+AC_MSG_CHECKING(for fdatasync)
+AC_TRY_COMPILE([#include <unistd.h>], void *x=fdatasync,
+  AC_DEFINE(HAVE_FDATASYNC, 1, Define if you have the 'fdatasync' function.)
+  AC_MSG_RESULT(yes),
+  AC_MSG_RESULT(no)
+)
+AC_MSG_CHECKING(for epoll)
+AC_TRY_COMPILE([#include <sys/epoll.h>], void *x=epoll_create,
+  AC_DEFINE(HAVE_EPOLL, 1, Define if you have the 'epoll' functions.)
+  AC_MSG_RESULT(yes),
+  AC_MSG_RESULT(no)
+)
+AC_MSG_CHECKING(for kqueue)
+AC_TRY_COMPILE([
+#include <sys/types.h>
+#include <sys/event.h>
+    ], int x=kqueue(),
+  AC_DEFINE(HAVE_KQUEUE, 1, Define if you have the 'kqueue' functions.)
+  AC_MSG_RESULT(yes),
+  AC_MSG_RESULT(no)
+)
+# On some systems (eg. FreeBSD 5), we would find a definition of the
+# functions ctermid_r, setgroups in the library, but no prototype
+# (e.g. because we use _XOPEN_SOURCE). See whether we can take their
+# address to avoid compiler warnings and potential miscompilations
+# because of the missing prototypes.
+
+AC_MSG_CHECKING(for ctermid_r)
+AC_TRY_COMPILE([
+#include "confdefs.h" 
+#include <stdio.h>
+], void* p = ctermid_r,
+  AC_DEFINE(HAVE_CTERMID_R, 1, Define if you have the 'ctermid_r' function.)
+  AC_MSG_RESULT(yes),
+  AC_MSG_RESULT(no)
+)
+
+AC_CACHE_CHECK([for flock declaration], [ac_cv_flock_decl],
+  [AC_COMPILE_IFELSE(
+    [AC_LANG_PROGRAM(
+      [#include <sys/file.h>],
+      [void* p = flock]
+    )],
+    [ac_cv_flock_decl=yes],
+    [ac_cv_flock_decl=no]
+  )
+])
+if test "x${ac_cv_flock_decl}" = xyes; then
+  AC_CHECK_FUNCS(flock,,
+    AC_CHECK_LIB(bsd,flock,
+      [AC_DEFINE(HAVE_FLOCK)
+       AC_DEFINE(FLOCK_NEEDS_LIBBSD, 1, Define if flock needs to be linked with bsd library.)
+    ])
+  )
+fi
+
+AC_MSG_CHECKING(for getpagesize)
+AC_TRY_COMPILE([
+#include "confdefs.h" 
+#include <unistd.h>
+], void* p = getpagesize,
+  AC_DEFINE(HAVE_GETPAGESIZE, 1, Define if you have the 'getpagesize' function.)
+  AC_MSG_RESULT(yes),
+  AC_MSG_RESULT(no)
+)
+
+dnl check for true
+AC_CHECK_PROGS(TRUE, true, /bin/true)
+
+dnl On some systems (e.g. Solaris 9), hstrerror and inet_aton are in -lresolv
+dnl On others, they are in the C library, so we to take no action
+AC_CHECK_LIB(c, inet_aton, [$ac_cv_prog_TRUE],
+  AC_CHECK_LIB(resolv, inet_aton)
+)
+
+# On Tru64, chflags seems to be present, but calling it will
+# exit Python
+AC_CACHE_CHECK([for chflags], [ac_cv_have_chflags], [dnl
+AC_TRY_RUN([[
+#include <sys/stat.h>
+#include <unistd.h>
+int main(int argc, char*argv[])
+{
+  if(chflags(argv[0], 0) != 0)
+    return 1;
+  return 0;
+}
+]], ac_cv_have_chflags=yes,
+   ac_cv_have_chflags=no,
+   ac_cv_have_chflags=cross)
+])
+if test "$ac_cv_have_chflags" = cross ; then
+  AC_CHECK_FUNC([chflags], [ac_cv_have_chflags="yes"], [ac_cv_have_chflags="no"])
+fi
+if test "$ac_cv_have_chflags" = yes ; then
+  AC_DEFINE(HAVE_CHFLAGS, 1, Define to 1 if you have the `chflags' function.)
+fi
+
+AC_CACHE_CHECK([for lchflags], [ac_cv_have_lchflags], [dnl
+AC_TRY_RUN([[
+#include <sys/stat.h>
+#include <unistd.h>
+int main(int argc, char*argv[])
+{
+  if(lchflags(argv[0], 0) != 0)
+    return 1;
+  return 0;
+}
+]], ac_cv_have_lchflags=yes,
+   ac_cv_have_lchflags=no,
+   ac_cv_have_lchflags=cross)
+])
+if test "$ac_cv_have_lchflags" = cross ; then
+  AC_CHECK_FUNC([lchflags], [ac_cv_have_lchflags="yes"], [ac_cv_have_lchflags="no"])
+fi
+if test "$ac_cv_have_lchflags" = yes ; then
+  AC_DEFINE(HAVE_LCHFLAGS, 1, Define to 1 if you have the `lchflags' function.)
+fi
+
+dnl Check if system zlib has *Copy() functions
+dnl
+dnl On MacOSX the linker will search for dylibs on the entire linker path
+dnl before searching for static libraries. setup.py adds -Wl,-search_paths_first
+dnl to revert to a more traditional unix behaviour and make it possible to
+dnl override the system libz with a local static library of libz. Temporarily
+dnl add that flag to our CFLAGS as well to ensure that we check the version
+dnl of libz that will be used by setup.py. 
+dnl The -L/usr/local/lib is needed as wel to get the same compilation 
+dnl environment as setup.py (and leaving it out can cause configure to use the
+dnl wrong version of the library)
+case $ac_sys_system/$ac_sys_release in
+Darwin/*) 
+	_CUR_CFLAGS="${CFLAGS}"
+	_CUR_LDFLAGS="${LDFLAGS}"
+	CFLAGS="${CFLAGS} -Wl,-search_paths_first"
+	LDFLAGS="${LDFLAGS} -Wl,-search_paths_first -L/usr/local/lib"
+	;;
+esac
+
+AC_CHECK_LIB(z, inflateCopy, AC_DEFINE(HAVE_ZLIB_COPY, 1, Define if the zlib library has inflateCopy))
+
+case $ac_sys_system/$ac_sys_release in
+Darwin/*) 
+	CFLAGS="${_CUR_CFLAGS}"
+	LDFLAGS="${_CUR_LDFLAGS}"
+	;;
+esac
+
+AC_MSG_CHECKING(for hstrerror)
+AC_TRY_LINK([
+#include "confdefs.h" 
+#include <netdb.h>
+], void* p = hstrerror; hstrerror(0),
+  AC_DEFINE(HAVE_HSTRERROR, 1, Define if you have the 'hstrerror' function.)
+  AC_MSG_RESULT(yes),
+  AC_MSG_RESULT(no)
+)
+
+AC_MSG_CHECKING(for inet_aton)
+AC_TRY_LINK([
+#include "confdefs.h" 
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+], void* p = inet_aton;inet_aton(0,0),
+  AC_DEFINE(HAVE_INET_ATON, 1, Define if you have the 'inet_aton' function.)
+  AC_MSG_RESULT(yes),
+  AC_MSG_RESULT(no)
+)
+
+AC_MSG_CHECKING(for inet_pton)
+AC_TRY_COMPILE([
+#include "confdefs.h" 
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+], void* p = inet_pton,
+  AC_DEFINE(HAVE_INET_PTON, 1, Define if you have the 'inet_pton' function.)
+  AC_MSG_RESULT(yes),
+  AC_MSG_RESULT(no)
+)
+
+# On some systems, setgroups is in unistd.h, on others, in grp.h
+AC_MSG_CHECKING(for setgroups)
+AC_TRY_COMPILE([
+#include "confdefs.h" 
+#include <unistd.h>
+#ifdef HAVE_GRP_H
+#include <grp.h>
+#endif
+], 
+void* p = setgroups,
+  AC_DEFINE(HAVE_SETGROUPS, 1, Define if you have the 'setgroups' function.)
+  AC_MSG_RESULT(yes),
+  AC_MSG_RESULT(no)
+)
+
+# check for openpty and forkpty
+
+AC_CHECK_FUNCS(openpty,, 
+   AC_CHECK_LIB(util,openpty,
+     [AC_DEFINE(HAVE_OPENPTY) LIBS="$LIBS -lutil"],
+     AC_CHECK_LIB(bsd,openpty, [AC_DEFINE(HAVE_OPENPTY) LIBS="$LIBS -lbsd"])
+   )
+)
+AC_CHECK_FUNCS(forkpty,, 
+   AC_CHECK_LIB(util,forkpty, 
+     [AC_DEFINE(HAVE_FORKPTY) LIBS="$LIBS -lutil"],
+     AC_CHECK_LIB(bsd,forkpty, [AC_DEFINE(HAVE_FORKPTY) LIBS="$LIBS -lbsd"])
+   )
+)
+
+# Stuff for expat.
+AC_CHECK_FUNCS(memmove)
+
+# check for long file support functions
+AC_CHECK_FUNCS(fseek64 fseeko fstatvfs ftell64 ftello statvfs)
+
+AC_REPLACE_FUNCS(dup2 getcwd strdup)
+AC_CHECK_FUNCS(getpgrp, 
+  AC_TRY_COMPILE([#include <unistd.h>], 
+   [getpgrp(0);], 
+   AC_DEFINE(GETPGRP_HAVE_ARG, 1,
+   [Define if getpgrp() must be called as getpgrp(0).])
+ )
+)
+AC_CHECK_FUNCS(setpgrp,
+  AC_TRY_COMPILE([#include <unistd.h>],
+    [setpgrp(0,0);],
+    AC_DEFINE(SETPGRP_HAVE_ARG, 1,
+    [Define if setpgrp() must be called as setpgrp(0, 0).])
+  )
+)
+AC_CHECK_FUNCS(gettimeofday, 
+  AC_TRY_COMPILE([#include <sys/time.h>], 
+    [gettimeofday((struct timeval*)0,(struct timezone*)0);], ,
+    AC_DEFINE(GETTIMEOFDAY_NO_TZ, 1,
+    [Define if gettimeofday() does not have second (timezone) argument
+     This is the case on Motorola V4 (R40V4.2)])
+  )
+)
+
+AC_MSG_CHECKING(for major, minor, and makedev)
+AC_TRY_LINK([
+#if defined(MAJOR_IN_MKDEV)
+#include <sys/mkdev.h>
+#elif defined(MAJOR_IN_SYSMACROS)
+#include <sys/sysmacros.h>
+#else
+#include <sys/types.h>
+#endif
+],[
+  makedev(major(0),minor(0));
+],[
+  AC_DEFINE(HAVE_DEVICE_MACROS, 1,
+	    [Define to 1 if you have the device macros.])
+  AC_MSG_RESULT(yes)
+],[
+  AC_MSG_RESULT(no)
+])
+
+# On OSF/1 V5.1, getaddrinfo is available, but a define
+# for [no]getaddrinfo in netdb.h. 
+AC_MSG_CHECKING(for getaddrinfo)
+AC_TRY_LINK([
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netdb.h>
+#include <stdio.h>
+],[
+getaddrinfo(NULL, NULL, NULL, NULL);
+], [
+AC_MSG_RESULT(yes)
+AC_MSG_CHECKING(getaddrinfo bug)
+AC_TRY_RUN([
+#include <sys/types.h>
+#include <netdb.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+
+main()
+{
+  int passive, gaierr, inet4 = 0, inet6 = 0;
+  struct addrinfo hints, *ai, *aitop;
+  char straddr[INET6_ADDRSTRLEN], strport[16];
+
+  for (passive = 0; passive <= 1; passive++) {
+    memset(&hints, 0, sizeof(hints));
+    hints.ai_family = AF_UNSPEC;
+    hints.ai_flags = passive ? AI_PASSIVE : 0;
+    hints.ai_socktype = SOCK_STREAM;
+    hints.ai_protocol = IPPROTO_TCP;
+    if ((gaierr = getaddrinfo(NULL, "54321", &hints, &aitop)) != 0) {
+      (void)gai_strerror(gaierr);
+      goto bad;
+    }
+    for (ai = aitop; ai; ai = ai->ai_next) {
+      if (ai->ai_addr == NULL ||
+          ai->ai_addrlen == 0 ||
+          getnameinfo(ai->ai_addr, ai->ai_addrlen,
+                      straddr, sizeof(straddr), strport, sizeof(strport),
+                      NI_NUMERICHOST|NI_NUMERICSERV) != 0) {
+        goto bad;
+      }
+      switch (ai->ai_family) {
+      case AF_INET:
+        if (strcmp(strport, "54321") != 0) {
+          goto bad;
+        }
+        if (passive) {
+          if (strcmp(straddr, "0.0.0.0") != 0) {
+            goto bad;
+          }
+        } else {
+          if (strcmp(straddr, "127.0.0.1") != 0) {
+            goto bad;
+          }
+        }
+        inet4++;
+        break;
+      case AF_INET6:
+        if (strcmp(strport, "54321") != 0) {
+          goto bad;
+        }
+        if (passive) {
+          if (strcmp(straddr, "::") != 0) {
+            goto bad;
+          }
+        } else {
+          if (strcmp(straddr, "::1") != 0) {
+            goto bad;
+          }
+        }
+        inet6++;
+        break;
+      case AF_UNSPEC:
+        goto bad;
+        break;
+      default:
+        /* another family support? */
+        break;
+      }
+    }
+  }
+
+  if (!(inet4 == 0 || inet4 == 2))
+    goto bad;
+  if (!(inet6 == 0 || inet6 == 2))
+    goto bad;
+
+  if (aitop)
+    freeaddrinfo(aitop);
+  exit(0);
+
+ bad:
+  if (aitop)
+    freeaddrinfo(aitop);
+  exit(1);
+}
+],
+AC_MSG_RESULT(good)
+buggygetaddrinfo=no,
+AC_MSG_RESULT(buggy)
+buggygetaddrinfo=yes,
+AC_MSG_RESULT(buggy)
+buggygetaddrinfo=yes)], [
+AC_MSG_RESULT(no)
+buggygetaddrinfo=yes
+])
+
+if test "$buggygetaddrinfo" = "yes"; then
+	if test "$ipv6" = "yes"; then
+		echo 'Fatal: You must get working getaddrinfo() function.'
+		echo '       or you can specify "--disable-ipv6"'.
+		exit 1
+	fi
+else
+	AC_DEFINE(HAVE_GETADDRINFO, 1, [Define if you have the getaddrinfo function.])
+fi
+AC_CHECK_FUNCS(getnameinfo)
+
+# checks for structures
+AC_HEADER_TIME
+AC_STRUCT_TM
+AC_STRUCT_TIMEZONE
+AC_CHECK_MEMBERS([struct stat.st_rdev])
+AC_CHECK_MEMBERS([struct stat.st_blksize])
+AC_CHECK_MEMBERS([struct stat.st_flags])
+AC_CHECK_MEMBERS([struct stat.st_gen])
+AC_CHECK_MEMBERS([struct stat.st_birthtime])
+AC_STRUCT_ST_BLOCKS
+
+AC_MSG_CHECKING(for time.h that defines altzone)
+AC_CACHE_VAL(ac_cv_header_time_altzone,
+[AC_TRY_COMPILE([#include <time.h>], [return altzone;],
+  ac_cv_header_time_altzone=yes,
+  ac_cv_header_time_altzone=no)])
+AC_MSG_RESULT($ac_cv_header_time_altzone)
+if test $ac_cv_header_time_altzone = yes; then
+  AC_DEFINE(HAVE_ALTZONE, 1, [Define this if your time.h defines altzone.])
+fi
+
+was_it_defined=no
+AC_MSG_CHECKING(whether sys/select.h and sys/time.h may both be included)
+AC_TRY_COMPILE([
+#include <sys/types.h>
+#include <sys/select.h>
+#include <sys/time.h>
+], [;], [
+  AC_DEFINE(SYS_SELECT_WITH_SYS_TIME, 1,
+  [Define if  you can safely include both <sys/select.h> and <sys/time.h>
+   (which you can't on SCO ODT 3.0).]) 
+  was_it_defined=yes
+])
+AC_MSG_RESULT($was_it_defined)
+
+AC_MSG_CHECKING(for addrinfo)
+AC_CACHE_VAL(ac_cv_struct_addrinfo,
+AC_TRY_COMPILE([
+#		include <netdb.h>],
+	[struct addrinfo a],
+	ac_cv_struct_addrinfo=yes,
+	ac_cv_struct_addrinfo=no))
+AC_MSG_RESULT($ac_cv_struct_addrinfo)
+if test $ac_cv_struct_addrinfo = yes; then
+	AC_DEFINE(HAVE_ADDRINFO, 1, [struct addrinfo (netdb.h)])
+fi
+
+AC_MSG_CHECKING(for sockaddr_storage)
+AC_CACHE_VAL(ac_cv_struct_sockaddr_storage,
+AC_TRY_COMPILE([
+#		include <sys/types.h>
+#		include <sys/socket.h>],
+	[struct sockaddr_storage s],
+	ac_cv_struct_sockaddr_storage=yes,
+	ac_cv_struct_sockaddr_storage=no))
+AC_MSG_RESULT($ac_cv_struct_sockaddr_storage)
+if test $ac_cv_struct_sockaddr_storage = yes; then
+	AC_DEFINE(HAVE_SOCKADDR_STORAGE, 1, [struct sockaddr_storage (sys/socket.h)])
+fi
+
+# checks for compiler characteristics
+
+AC_C_CHAR_UNSIGNED
+AC_C_CONST
+
+works=no
+AC_MSG_CHECKING(for working volatile)
+AC_TRY_COMPILE([],[volatile int x; x = 0;], works=yes, 
+  AC_DEFINE(volatile, [], [Define to empty if the keyword does not work.])
+)
+AC_MSG_RESULT($works)
+
+works=no
+AC_MSG_CHECKING(for working signed char)
+AC_TRY_COMPILE([], [signed char c;], works=yes, 
+  AC_DEFINE(signed, [], [Define to empty if the keyword does not work.])
+)
+AC_MSG_RESULT($works)
+
+have_prototypes=no
+AC_MSG_CHECKING(for prototypes)
+AC_TRY_COMPILE([int foo(int x) { return 0; }], [return foo(10);],[
+  AC_DEFINE(HAVE_PROTOTYPES, 1, 
+   [Define if your compiler supports function prototype]) 
+  have_prototypes=yes
+])
+AC_MSG_RESULT($have_prototypes)
+
+works=no
+AC_MSG_CHECKING(for variable length prototypes and stdarg.h)
+AC_TRY_COMPILE([
+#include <stdarg.h>
+int foo(int x, ...) {
+	va_list va;
+	va_start(va, x);
+	va_arg(va, int);
+	va_arg(va, char *);
+	va_arg(va, double);
+	return 0;
+}
+], [return foo(10, "", 3.14);], [
+  AC_DEFINE(HAVE_STDARG_PROTOTYPES, 1,
+   [Define if your compiler supports variable length function prototypes
+   (e.g. void fprintf(FILE *, char *, ...);) *and* <stdarg.h>]) 
+  works=yes
+])
+AC_MSG_RESULT($works)
+
+# check for socketpair
+AC_MSG_CHECKING(for socketpair)
+AC_TRY_COMPILE([
+#include <sys/types.h>
+#include <sys/socket.h>
+], void *x=socketpair,
+  AC_DEFINE(HAVE_SOCKETPAIR, 1, Define if you have the 'socketpair' function.)
+  AC_MSG_RESULT(yes),
+  AC_MSG_RESULT(no)
+)
+
+# check if sockaddr has sa_len member
+AC_MSG_CHECKING(if sockaddr has sa_len member)
+AC_TRY_COMPILE([#include <sys/types.h>
+#include <sys/socket.h>],
+[struct sockaddr x;
+x.sa_len = 0;],
+	AC_MSG_RESULT(yes)
+	AC_DEFINE(HAVE_SOCKADDR_SA_LEN, 1, [Define if sockaddr has sa_len member]),
+	AC_MSG_RESULT(no))
+
+va_list_is_array=no
+AC_MSG_CHECKING(whether va_list is an array)
+AC_TRY_COMPILE([
+#ifdef HAVE_STDARG_PROTOTYPES
+#include <stdarg.h>
+#else
+#include <varargs.h>
+#endif
+], [va_list list1, list2; list1 = list2;], , [
+ AC_DEFINE(VA_LIST_IS_ARRAY, 1, [Define if a va_list is an array of some kind]) 
+ va_list_is_array=yes
+])
+AC_MSG_RESULT($va_list_is_array)
+
+# sigh -- gethostbyname_r is a mess; it can have 3, 5 or 6 arguments :-(
+AH_TEMPLATE(HAVE_GETHOSTBYNAME_R,
+  [Define this if you have some version of gethostbyname_r()])
+
+AC_CHECK_FUNC(gethostbyname_r, [
+  AC_DEFINE(HAVE_GETHOSTBYNAME_R)
+  AC_MSG_CHECKING([gethostbyname_r with 6 args])
+  OLD_CFLAGS=$CFLAGS
+  CFLAGS="$CFLAGS $MY_CPPFLAGS $MY_THREAD_CPPFLAGS $MY_CFLAGS"
+  AC_TRY_COMPILE([
+#   include <netdb.h>
+  ], [
+    char *name;
+    struct hostent *he, *res;
+    char buffer[2048];
+    int buflen = 2048;
+    int h_errnop;
+
+    (void) gethostbyname_r(name, he, buffer, buflen, &res, &h_errnop)
+  ], [
+    AC_DEFINE(HAVE_GETHOSTBYNAME_R)
+    AC_DEFINE(HAVE_GETHOSTBYNAME_R_6_ARG, 1,
+    [Define this if you have the 6-arg version of gethostbyname_r().])
+    AC_MSG_RESULT(yes)
+  ], [
+    AC_MSG_RESULT(no)
+    AC_MSG_CHECKING([gethostbyname_r with 5 args])
+    AC_TRY_COMPILE([
+#     include <netdb.h>
+    ], [
+      char *name;
+      struct hostent *he;
+      char buffer[2048];
+      int buflen = 2048;
+      int h_errnop;
+
+      (void) gethostbyname_r(name, he, buffer, buflen, &h_errnop)
+    ], [
+      AC_DEFINE(HAVE_GETHOSTBYNAME_R)
+      AC_DEFINE(HAVE_GETHOSTBYNAME_R_5_ARG, 1,
+      [Define this if you have the 5-arg version of gethostbyname_r().])
+      AC_MSG_RESULT(yes)
+    ], [
+      AC_MSG_RESULT(no)
+      AC_MSG_CHECKING([gethostbyname_r with 3 args])
+      AC_TRY_COMPILE([
+#       include <netdb.h>
+      ], [
+        char *name;
+        struct hostent *he;
+        struct hostent_data data;
+
+        (void) gethostbyname_r(name, he, &data);
+      ], [
+        AC_DEFINE(HAVE_GETHOSTBYNAME_R)
+        AC_DEFINE(HAVE_GETHOSTBYNAME_R_3_ARG, 1,
+        [Define this if you have the 3-arg version of gethostbyname_r().])
+        AC_MSG_RESULT(yes)
+      ], [
+        AC_MSG_RESULT(no)
+      ])
+    ])
+  ])
+  CFLAGS=$OLD_CFLAGS
+], [
+  AC_CHECK_FUNCS(gethostbyname)
+])
+AC_SUBST(HAVE_GETHOSTBYNAME_R_6_ARG)
+AC_SUBST(HAVE_GETHOSTBYNAME_R_5_ARG)
+AC_SUBST(HAVE_GETHOSTBYNAME_R_3_ARG)
+AC_SUBST(HAVE_GETHOSTBYNAME_R)
+AC_SUBST(HAVE_GETHOSTBYNAME)
+
+# checks for system services
+# (none yet)
+
+# Linux requires this for correct f.p. operations
+AC_CHECK_FUNC(__fpu_control,
+  [],
+  [AC_CHECK_LIB(ieee, __fpu_control)
+])
+
+# Check for --with-fpectl
+AC_MSG_CHECKING(for --with-fpectl)
+AC_ARG_WITH(fpectl,
+            AC_HELP_STRING(--with-fpectl, enable SIGFPE catching),
+[
+if test "$withval" != no
+then 
+  AC_DEFINE(WANT_SIGFPE_HANDLER, 1,
+  [Define if you want SIGFPE handled (see Include/pyfpe.h).]) 
+  AC_MSG_RESULT(yes)
+else AC_MSG_RESULT(no)
+fi],
+[AC_MSG_RESULT(no)])
+
+# check for --with-libm=...
+AC_SUBST(LIBM)
+case $ac_sys_system in
+Darwin) ;;
+*) LIBM=-lm
+esac
+AC_MSG_CHECKING(for --with-libm=STRING)
+AC_ARG_WITH(libm,
+            AC_HELP_STRING(--with-libm=STRING, math library),
+[
+if test "$withval" = no
+then LIBM=
+     AC_MSG_RESULT(force LIBM empty)
+elif test "$withval" != yes
+then LIBM=$withval
+     AC_MSG_RESULT(set LIBM="$withval")
+else AC_MSG_ERROR([proper usage is --with-libm=STRING])
+fi],
+[AC_MSG_RESULT(default LIBM="$LIBM")])
+
+# check for --with-libc=...
+AC_SUBST(LIBC)
+AC_MSG_CHECKING(for --with-libc=STRING)
+AC_ARG_WITH(libc,
+            AC_HELP_STRING(--with-libc=STRING, C library),
+[
+if test "$withval" = no
+then LIBC=
+     AC_MSG_RESULT(force LIBC empty)
+elif test "$withval" != yes
+then LIBC=$withval
+     AC_MSG_RESULT(set LIBC="$withval")
+else AC_MSG_ERROR([proper usage is --with-libc=STRING])
+fi],
+[AC_MSG_RESULT(default LIBC="$LIBC")])
+
+# **************************************************
+# * Check for various properties of floating point *
+# **************************************************
+
+AC_MSG_CHECKING(whether C doubles are little-endian IEEE 754 binary64)
+AC_CACHE_VAL(ac_cv_little_endian_double, [
+AC_TRY_RUN([
+#include <string.h>
+int main() {
+    double x = 9006104071832581.0;
+    if (memcmp(&x, "\x05\x04\x03\x02\x01\xff\x3f\x43", 8) == 0)
+        return 0;
+    else
+        return 1;
+}
+],
+ac_cv_little_endian_double=yes,
+ac_cv_little_endian_double=no,
+ac_cv_little_endian_double=no)])
+AC_MSG_RESULT($ac_cv_little_endian_double)
+if test "$ac_cv_little_endian_double" = yes
+then
+  AC_DEFINE(DOUBLE_IS_LITTLE_ENDIAN_IEEE754, 1,
+  [Define if C doubles are 64-bit IEEE 754 binary format, stored
+   with the least significant byte first])
+fi
+
+AC_MSG_CHECKING(whether C doubles are big-endian IEEE 754 binary64)
+AC_CACHE_VAL(ac_cv_big_endian_double, [
+AC_TRY_RUN([
+#include <string.h>
+int main() {
+    double x = 9006104071832581.0;
+    if (memcmp(&x, "\x43\x3f\xff\x01\x02\x03\x04\x05", 8) == 0)
+        return 0;
+    else
+        return 1;
+}
+],
+ac_cv_big_endian_double=yes,
+ac_cv_big_endian_double=no,
+ac_cv_big_endian_double=no)])
+AC_MSG_RESULT($ac_cv_big_endian_double)
+if test "$ac_cv_big_endian_double" = yes
+then
+  AC_DEFINE(DOUBLE_IS_BIG_ENDIAN_IEEE754, 1,
+  [Define if C doubles are 64-bit IEEE 754 binary format, stored
+   with the most significant byte first])
+fi
+
+# Some ARM platforms use a mixed-endian representation for doubles.
+# While Python doesn't currently have full support for these platforms
+# (see e.g., issue 1762561), we can at least make sure that float <-> string
+# conversions work.
+AC_MSG_CHECKING(whether C doubles are ARM mixed-endian IEEE 754 binary64)
+AC_CACHE_VAL(ac_cv_mixed_endian_double, [
+AC_TRY_RUN([
+#include <string.h>
+int main() {
+    double x = 9006104071832581.0;
+    if (memcmp(&x, "\x01\xff\x3f\x43\x05\x04\x03\x02", 8) == 0)
+        return 0;
+    else
+        return 1;
+}
+],
+ac_cv_mixed_endian_double=yes,
+ac_cv_mixed_endian_double=no,
+ac_cv_mixed_endian_double=no)])
+AC_MSG_RESULT($ac_cv_mixed_endian_double)
+if test "$ac_cv_mixed_endian_double" = yes
+then
+  AC_DEFINE(DOUBLE_IS_ARM_MIXED_ENDIAN_IEEE754, 1,
+  [Define if C doubles are 64-bit IEEE 754 binary format, stored
+   in ARM mixed-endian order (byte order 45670123)])
+fi
+
+# The short float repr introduced in Python 3.1 requires the
+# correctly-rounded string <-> double conversion functions from
+# Python/dtoa.c, which in turn require that the FPU uses 53-bit
+# rounding; this is a problem on x86, where the x87 FPU has a default
+# rounding precision of 64 bits.  For gcc/x86, we try to fix this by
+# using inline assembler to get and set the x87 FPU control word.
+if test "$GCC" = yes && test -n "`$CC -dM -E - </dev/null | grep i386`"
+then
+    # Check that it's okay to use gcc inline assembler to get and set
+    # x87 control word.  It should be, but you never know...
+    AC_MSG_CHECKING(whether we can use gcc inline assembler to get and set x87 control word)
+    AC_TRY_COMPILE([], [
+      unsigned short cw;
+      __asm__ __volatile__ ("fnstcw %0" : "=m" (cw));
+      __asm__ __volatile__ ("fldcw %0" : : "m" (cw));
+    ],
+    [have_gcc_asm_for_x87=yes], [have_gcc_asm_for_x87=no])
+    AC_MSG_RESULT($have_gcc_asm_for_x87)
+    if test "$have_gcc_asm_for_x87" = yes
+    then
+        AC_DEFINE(HAVE_GCC_ASM_FOR_X87, 1,
+        [Define if we can use gcc inline assembler to get and set x87 control word])
+    fi
+fi
+
+# Detect whether system arithmetic is subject to x87-style double
+# rounding issues.  The result of this test has little meaning on non
+# IEEE 754 platforms.  On IEEE 754, test should return 1 if rounding
+# mode is round-to-nearest and double rounding issues are present, and
+# 0 otherwise.  See http://bugs.python.org/issue2937 for more info.
+AC_MSG_CHECKING(for x87-style double rounding)
+# $BASECFLAGS may affect the result
+ac_save_cc="$CC"
+CC="$CC $BASECFLAGS"
+AC_TRY_RUN([
+#include <stdlib.h>
+#include <math.h>
+int main() {
+    volatile double x, y, z;
+    /* 1./(1-2**-53) -> 1+2**-52 (correct), 1.0 (double rounding) */
+    x = 0.99999999999999989; /* 1-2**-53 */
+    y = 1./x;
+    if (y != 1.)
+        exit(0);
+    /* 1e16+2.99999 -> 1e16+2. (correct), 1e16+4. (double rounding) */
+    x = 1e16;
+    y = 2.99999;
+    z = x + y;
+    if (z != 1e16+4.)
+        exit(0);
+    /* both tests show evidence of double rounding */
+    exit(1);
+}
+],
+ac_cv_x87_double_rounding=no,
+ac_cv_x87_double_rounding=yes,
+ac_cv_x87_double_rounding=no)
+CC="$ac_save_cc"
+AC_MSG_RESULT($ac_cv_x87_double_rounding)
+if test "$ac_cv_x87_double_rounding" = yes
+then
+  AC_DEFINE(X87_DOUBLE_ROUNDING, 1,
+  [Define if arithmetic is subject to x87-style double rounding issue])
+fi
+
+# ************************************
+# * Check for mathematical functions *
+# ************************************
+
+LIBS_SAVE=$LIBS
+LIBS="$LIBS $LIBM"
+
+# On FreeBSD 6.2, it appears that tanh(-0.) returns 0. instead of
+# -0. on some architectures.
+AC_MSG_CHECKING(whether tanh preserves the sign of zero)
+AC_CACHE_VAL(ac_cv_tanh_preserves_zero_sign, [
+AC_TRY_RUN([
+#include <math.h>
+#include <stdlib.h>
+int main() {
+    /* return 0 if either negative zeros don't exist
+       on this platform or if negative zeros exist
+       and tanh(-0.) == -0. */
+  if (atan2(0., -1.) == atan2(-0., -1.) ||
+      atan2(tanh(-0.), -1.) == atan2(-0., -1.)) exit(0);
+  else exit(1);
+}
+],
+ac_cv_tanh_preserves_zero_sign=yes,
+ac_cv_tanh_preserves_zero_sign=no,
+ac_cv_tanh_preserves_zero_sign=no)])
+AC_MSG_RESULT($ac_cv_tanh_preserves_zero_sign)
+if test "$ac_cv_tanh_preserves_zero_sign" = yes
+then
+  AC_DEFINE(TANH_PRESERVES_ZERO_SIGN, 1,
+  [Define if tanh(-0.) is -0., or if platform doesn't have signed zeros])
+fi
+
+AC_CHECK_FUNCS([acosh asinh atanh copysign expm1 finite hypot log1p round])
+AC_CHECK_DECLS([isinf, isnan, isfinite], [], [], [[#include <math.h>]])
+
+LIBS=$LIBS_SAVE
+
+# For multiprocessing module, check that sem_open
+# actually works.  For FreeBSD versions <= 7.2,
+# the kernel module that provides POSIX semaphores
+# isn't loaded by default, so an attempt to call
+# sem_open results in a 'Signal 12' error.
+AC_MSG_CHECKING(whether POSIX semaphores are enabled)
+AC_CACHE_VAL(ac_cv_posix_semaphores_enabled,
+AC_TRY_RUN([
+#include <unistd.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <semaphore.h>
+#include <sys/stat.h>
+
+int main(void) {
+  sem_t *a = sem_open("/autoconf", O_CREAT, S_IRUSR|S_IWUSR, 0);
+  if (a == SEM_FAILED) {
+    perror("sem_open");
+    return 1;
+  }
+  sem_close(a);
+  sem_unlink("/autoconf");
+  return 0;
+}
+], ac_cv_posix_semaphores_enabled=yes,
+   ac_cv_posix_semaphores_enabled=no,
+   ac_cv_posix_semaphores_enabled=yes)
+)
+AC_MSG_RESULT($ac_cv_posix_semaphores_enabled)
+if test $ac_cv_posix_semaphores_enabled = no
+then
+  AC_DEFINE(POSIX_SEMAPHORES_NOT_ENABLED, 1,
+            [Define if POSIX semaphores aren't enabled on your system])
+fi
+
+# Multiprocessing check for broken sem_getvalue
+AC_MSG_CHECKING(for broken sem_getvalue)
+AC_TRY_RUN([
+#include <unistd.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <semaphore.h>
+#include <sys/stat.h>
+
+int main(void){
+  sem_t *a = sem_open("/autocftw", O_CREAT, S_IRUSR|S_IWUSR, 0);
+  int count;
+  int res;
+  if(a==SEM_FAILED){
+    perror("sem_open");
+    return 1;
+
+  }
+  res = sem_getvalue(a, &count);
+  sem_close(a);
+  sem_unlink("/autocftw");
+  return res==-1 ? 1 : 0;
+}
+]
+,AC_MSG_RESULT(no),
+ AC_MSG_RESULT(yes)
+  AC_DEFINE(HAVE_BROKEN_SEM_GETVALUE, 1, define to 1 if your sem_getvalue is broken.)
+)
+
+# determine what size digit to use for Python's longs
+AC_MSG_CHECKING([digit size for Python's longs])
+AC_ARG_ENABLE(big-digits,
+AC_HELP_STRING([--enable-big-digits@<:@=BITS@:>@],[use big digits for Python longs [[BITS=30]]]),
+[case $enable_big_digits in
+yes)
+  enable_big_digits=30 ;;
+no)
+  enable_big_digits=15 ;;
+[15|30])
+  ;;
+*)
+  AC_MSG_ERROR([bad value $enable_big_digits for --enable-big-digits; value should be 15 or 30]) ;;
+esac
+AC_MSG_RESULT($enable_big_digits)
+AC_DEFINE_UNQUOTED(PYLONG_BITS_IN_DIGIT, $enable_big_digits, [Define as the preferred size in bits of long digits])
+],
+[AC_MSG_RESULT(no value specified)])
+
+# check for wchar.h
+AC_CHECK_HEADER(wchar.h, [
+  AC_DEFINE(HAVE_WCHAR_H, 1, 
+  [Define if the compiler provides a wchar.h header file.]) 
+  wchar_h="yes"
+],
+wchar_h="no"
+)
+
+# determine wchar_t size
+if test "$wchar_h" = yes
+then
+  AC_CHECK_SIZEOF(wchar_t, 4, [#include <wchar.h>])
+fi
+
+AC_MSG_CHECKING(for UCS-4 tcl)
+have_ucs4_tcl=no
+AC_TRY_COMPILE([
+#include <tcl.h>
+#if TCL_UTF_MAX != 6
+# error "NOT UCS4_TCL"
+#endif], [], [
+  AC_DEFINE(HAVE_UCS4_TCL, 1, [Define this if you have tcl and TCL_UTF_MAX==6])
+  have_ucs4_tcl=yes
+])
+AC_MSG_RESULT($have_ucs4_tcl)
+
+# check whether wchar_t is signed or not
+if test "$wchar_h" = yes
+then
+  # check whether wchar_t is signed or not
+  AC_MSG_CHECKING(whether wchar_t is signed)
+  AC_CACHE_VAL(ac_cv_wchar_t_signed, [
+  AC_TRY_RUN([
+  #include <wchar.h>
+  int main()
+  {
+	/* Success: exit code 0 */
+        exit((((wchar_t) -1) < ((wchar_t) 0)) ? 0 : 1);
+  }
+  ],
+  ac_cv_wchar_t_signed=yes,
+  ac_cv_wchar_t_signed=no,
+  ac_cv_wchar_t_signed=yes)])
+  AC_MSG_RESULT($ac_cv_wchar_t_signed)
+fi
+
+AC_MSG_CHECKING(what type to use for str)
+AC_ARG_WITH(wide-unicode, 
+            AC_HELP_STRING(--with-wide-unicode, Use 4-byte Unicode characters (default is 2 bytes)),
+[
+if test "$withval" != no
+then unicode_size="4"
+else unicode_size="2"
+fi
+],
+[
+case "$have_ucs4_tcl" in
+  yes) unicode_size="4" ;;
+  *)   unicode_size="2" ;;
+esac
+])
+
+AH_TEMPLATE(Py_UNICODE_SIZE,
+  [Define as the size of the unicode type.])
+case "$unicode_size" in
+  4) AC_DEFINE(Py_UNICODE_SIZE, 4) ;;
+  *) AC_DEFINE(Py_UNICODE_SIZE, 2) ;;
+esac
+
+AH_TEMPLATE(PY_UNICODE_TYPE,
+  [Define as the integral type used for Unicode representation.])
+
+# wchar_t is only usable if it maps to an unsigned type
+if test "$unicode_size" = "$ac_cv_sizeof_wchar_t" \
+          -a "$ac_cv_wchar_t_signed" = "no"
+then
+  PY_UNICODE_TYPE="wchar_t"
+  AC_DEFINE(HAVE_USABLE_WCHAR_T, 1,
+  [Define if you have a useable wchar_t type defined in wchar.h; useable
+   means wchar_t must be an unsigned type with at least 16 bits. (see
+   Include/unicodeobject.h).])
+  AC_DEFINE(PY_UNICODE_TYPE,wchar_t)
+elif test "$ac_cv_sizeof_short" = "$unicode_size"
+then
+     PY_UNICODE_TYPE="unsigned short"
+     AC_DEFINE(PY_UNICODE_TYPE,unsigned short)
+elif test "$ac_cv_sizeof_long" = "$unicode_size"
+then
+     PY_UNICODE_TYPE="unsigned long"
+     AC_DEFINE(PY_UNICODE_TYPE,unsigned long)
+else
+     PY_UNICODE_TYPE="no type found"
+fi
+AC_MSG_RESULT($PY_UNICODE_TYPE)
+
+# check for endianness
+AC_C_BIGENDIAN
+
+# Check whether right shifting a negative integer extends the sign bit
+# or fills with zeros (like the Cray J90, according to Tim Peters).
+AC_MSG_CHECKING(whether right shift extends the sign bit)
+AC_CACHE_VAL(ac_cv_rshift_extends_sign, [
+AC_TRY_RUN([
+int main()
+{
+	exit(((-1)>>3 == -1) ? 0 : 1);
+}
+],
+ac_cv_rshift_extends_sign=yes,
+ac_cv_rshift_extends_sign=no,
+ac_cv_rshift_extends_sign=yes)])
+AC_MSG_RESULT($ac_cv_rshift_extends_sign)
+if test "$ac_cv_rshift_extends_sign" = no
+then
+  AC_DEFINE(SIGNED_RIGHT_SHIFT_ZERO_FILLS, 1,
+  [Define if i>>j for signed int i does not extend the sign bit
+   when i < 0])
+fi
+
+# check for getc_unlocked and related locking functions
+AC_MSG_CHECKING(for getc_unlocked() and friends)
+AC_CACHE_VAL(ac_cv_have_getc_unlocked, [
+AC_TRY_LINK([#include <stdio.h>],[
+	FILE *f = fopen("/dev/null", "r");
+	flockfile(f);
+	getc_unlocked(f);
+	funlockfile(f);
+], ac_cv_have_getc_unlocked=yes, ac_cv_have_getc_unlocked=no)])
+AC_MSG_RESULT($ac_cv_have_getc_unlocked)
+if test "$ac_cv_have_getc_unlocked" = yes
+then
+  AC_DEFINE(HAVE_GETC_UNLOCKED, 1,
+  [Define this if you have flockfile(), getc_unlocked(), and funlockfile()])
+fi
+
+# check where readline lives
+# save the value of LIBS so we don't actually link Python with readline
+LIBS_no_readline=$LIBS
+
+# On some systems we need to link readline to a termcap compatible
+# library.  NOTE: Keep the precedence of listed libraries synchronised
+# with setup.py.
+py_cv_lib_readline=no
+AC_MSG_CHECKING([how to link readline libs])
+for py_libtermcap in "" ncursesw ncurses curses termcap; do
+  if test -z "$py_libtermcap"; then
+    READLINE_LIBS="-lreadline"
+  else
+    READLINE_LIBS="-lreadline -l$py_libtermcap"
+  fi
+  LIBS="$READLINE_LIBS $LIBS_no_readline"
+  AC_LINK_IFELSE(
+    [AC_LANG_CALL([],[readline])],
+    [py_cv_lib_readline=yes])
+  if test $py_cv_lib_readline = yes; then
+    break
+  fi
+done
+# Uncomment this line if you want to use READINE_LIBS in Makefile or scripts
+#AC_SUBST([READLINE_LIBS])
+if test $py_cv_lib_readline = no; then
+  AC_MSG_RESULT([none])
+else
+  AC_MSG_RESULT([$READLINE_LIBS])
+  AC_DEFINE(HAVE_LIBREADLINE, 1,
+    [Define if you have the readline library (-lreadline).])
+fi
+
+# check for readline 2.1
+AC_CHECK_LIB(readline, rl_callback_handler_install,
+	AC_DEFINE(HAVE_RL_CALLBACK, 1,
+        [Define if you have readline 2.1]), ,$READLINE_LIBS)
+
+# check for readline 2.2
+AC_TRY_CPP([#include <readline/readline.h>],
+have_readline=yes, have_readline=no)
+if test $have_readline = yes
+then
+  AC_EGREP_HEADER([extern int rl_completion_append_character;],
+  [readline/readline.h],
+  AC_DEFINE(HAVE_RL_COMPLETION_APPEND_CHARACTER, 1,
+  [Define if you have readline 2.2]), )
+  AC_EGREP_HEADER([extern int rl_completion_suppress_append;],
+  [readline/readline.h],
+  AC_DEFINE(HAVE_RL_COMPLETION_SUPPRESS_APPEND, 1,
+  [Define if you have rl_completion_suppress_append]), )
+fi
+
+# check for readline 4.0
+AC_CHECK_LIB(readline, rl_pre_input_hook,
+	AC_DEFINE(HAVE_RL_PRE_INPUT_HOOK, 1,
+        [Define if you have readline 4.0]), ,$READLINE_LIBS)
+
+# also in 4.0
+AC_CHECK_LIB(readline, rl_completion_display_matches_hook,
+	AC_DEFINE(HAVE_RL_COMPLETION_DISPLAY_MATCHES_HOOK, 1,
+        [Define if you have readline 4.0]), ,$READLINE_LIBS)
+
+# check for readline 4.2
+AC_CHECK_LIB(readline, rl_completion_matches,
+	AC_DEFINE(HAVE_RL_COMPLETION_MATCHES, 1,
+        [Define if you have readline 4.2]), ,$READLINE_LIBS)
+
+# also in readline 4.2
+AC_TRY_CPP([#include <readline/readline.h>],
+have_readline=yes, have_readline=no)
+if test $have_readline = yes
+then
+  AC_EGREP_HEADER([extern int rl_catch_signals;],
+  [readline/readline.h],
+  AC_DEFINE(HAVE_RL_CATCH_SIGNAL, 1,
+  [Define if you can turn off readline's signal handling.]), )
+fi
+
+# End of readline checks: restore LIBS
+LIBS=$LIBS_no_readline
+
+AC_MSG_CHECKING(for broken nice())
+AC_CACHE_VAL(ac_cv_broken_nice, [
+AC_TRY_RUN([
+int main()
+{
+	int val1 = nice(1);
+	if (val1 != -1 && val1 == nice(2))
+		exit(0);
+	exit(1);
+}
+],
+ac_cv_broken_nice=yes,
+ac_cv_broken_nice=no,
+ac_cv_broken_nice=no)])
+AC_MSG_RESULT($ac_cv_broken_nice)
+if test "$ac_cv_broken_nice" = yes
+then
+  AC_DEFINE(HAVE_BROKEN_NICE, 1,
+  [Define if nice() returns success/failure instead of the new priority.])
+fi
+
+AC_MSG_CHECKING(for broken poll())
+AC_TRY_RUN([
+#include <poll.h>
+
+int main (void)
+    {
+    struct pollfd poll_struct = { 42, POLLIN|POLLPRI|POLLOUT, 0 };
+    
+    close (42);
+
+    int poll_test = poll (&poll_struct, 1, 0);
+
+    if (poll_test < 0)
+        {
+        exit(0);
+        }
+    else if (poll_test == 0 && poll_struct.revents != POLLNVAL)
+        {
+        exit(0);
+        }
+    else
+        {
+        exit(1);
+        }
+    }
+],
+ac_cv_broken_poll=yes,
+ac_cv_broken_poll=no,
+ac_cv_broken_poll=no)
+AC_MSG_RESULT($ac_cv_broken_poll)
+if test "$ac_cv_broken_poll" = yes
+then
+  AC_DEFINE(HAVE_BROKEN_POLL, 1,
+      [Define if poll() sets errno on invalid file descriptors.])
+fi
+
+# Before we can test tzset, we need to check if struct tm has a tm_zone 
+# (which is not required by ISO C or UNIX spec) and/or if we support
+# tzname[]
+AC_STRUCT_TIMEZONE
+
+# check tzset(3) exists and works like we expect it to
+AC_MSG_CHECKING(for working tzset())
+AC_CACHE_VAL(ac_cv_working_tzset, [
+AC_TRY_RUN([
+#include <stdlib.h>
+#include <time.h>
+#include <string.h>
+
+#if HAVE_TZNAME
+extern char *tzname[];
+#endif
+
+int main()
+{
+	/* Note that we need to ensure that not only does tzset(3)
+	   do 'something' with localtime, but it works as documented
+	   in the library reference and as expected by the test suite.
+	   This includes making sure that tzname is set properly if
+	   tm->tm_zone does not exist since it is the alternative way
+	   of getting timezone info.
+
+	   Red Hat 6.2 doesn't understand the southern hemisphere 
+	   after New Year's Day.
+	*/
+
+	time_t groundhogday = 1044144000; /* GMT-based */
+	time_t midyear = groundhogday + (365 * 24 * 3600 / 2);
+
+	putenv("TZ=UTC+0");
+	tzset();
+	if (localtime(&groundhogday)->tm_hour != 0)
+	    exit(1);
+#if HAVE_TZNAME
+	/* For UTC, tzname[1] is sometimes "", sometimes "   " */
+	if (strcmp(tzname[0], "UTC") || 
+		(tzname[1][0] != 0 && tzname[1][0] != ' '))
+	    exit(1);
+#endif
+
+	putenv("TZ=EST+5EDT,M4.1.0,M10.5.0");
+	tzset();
+	if (localtime(&groundhogday)->tm_hour != 19)
+	    exit(1);
+#if HAVE_TZNAME
+	if (strcmp(tzname[0], "EST") || strcmp(tzname[1], "EDT"))
+	    exit(1);
+#endif
+
+	putenv("TZ=AEST-10AEDT-11,M10.5.0,M3.5.0");
+	tzset();
+	if (localtime(&groundhogday)->tm_hour != 11)
+	    exit(1);
+#if HAVE_TZNAME
+	if (strcmp(tzname[0], "AEST") || strcmp(tzname[1], "AEDT"))
+	    exit(1);
+#endif
+
+#if HAVE_STRUCT_TM_TM_ZONE
+	if (strcmp(localtime(&groundhogday)->tm_zone, "AEDT"))
+	    exit(1);
+	if (strcmp(localtime(&midyear)->tm_zone, "AEST"))
+	    exit(1);
+#endif
+
+	exit(0);
+}
+],
+ac_cv_working_tzset=yes,
+ac_cv_working_tzset=no,
+ac_cv_working_tzset=no)])
+AC_MSG_RESULT($ac_cv_working_tzset)
+if test "$ac_cv_working_tzset" = yes
+then
+  AC_DEFINE(HAVE_WORKING_TZSET, 1,
+  [Define if tzset() actually switches the local timezone in a meaningful way.])
+fi
+
+# Look for subsecond timestamps in struct stat
+AC_MSG_CHECKING(for tv_nsec in struct stat)
+AC_CACHE_VAL(ac_cv_stat_tv_nsec,
+AC_TRY_COMPILE([#include <sys/stat.h>], [
+struct stat st;
+st.st_mtim.tv_nsec = 1;
+],
+ac_cv_stat_tv_nsec=yes,
+ac_cv_stat_tv_nsec=no,
+ac_cv_stat_tv_nsec=no))
+AC_MSG_RESULT($ac_cv_stat_tv_nsec)
+if test "$ac_cv_stat_tv_nsec" = yes
+then
+  AC_DEFINE(HAVE_STAT_TV_NSEC, 1,
+  [Define if you have struct stat.st_mtim.tv_nsec])
+fi
+
+# Look for BSD style subsecond timestamps in struct stat
+AC_MSG_CHECKING(for tv_nsec2 in struct stat)
+AC_CACHE_VAL(ac_cv_stat_tv_nsec2,
+AC_TRY_COMPILE([#include <sys/stat.h>], [
+struct stat st;
+st.st_mtimespec.tv_nsec = 1;
+],
+ac_cv_stat_tv_nsec2=yes,
+ac_cv_stat_tv_nsec2=no,
+ac_cv_stat_tv_nsec2=no))
+AC_MSG_RESULT($ac_cv_stat_tv_nsec2)
+if test "$ac_cv_stat_tv_nsec2" = yes
+then
+  AC_DEFINE(HAVE_STAT_TV_NSEC2, 1,
+  [Define if you have struct stat.st_mtimensec])
+fi
+
+# On HP/UX 11.0, mvwdelch is a block with a return statement
+AC_MSG_CHECKING(whether mvwdelch is an expression)
+AC_CACHE_VAL(ac_cv_mvwdelch_is_expression,
+AC_TRY_COMPILE([#include <curses.h>], [
+  int rtn;
+  rtn = mvwdelch(0,0,0);
+], ac_cv_mvwdelch_is_expression=yes,
+   ac_cv_mvwdelch_is_expression=no,
+   ac_cv_mvwdelch_is_expression=yes))
+AC_MSG_RESULT($ac_cv_mvwdelch_is_expression)
+
+if test "$ac_cv_mvwdelch_is_expression" = yes
+then
+  AC_DEFINE(MVWDELCH_IS_EXPRESSION, 1,
+  [Define if mvwdelch in curses.h is an expression.])
+fi
+
+AC_MSG_CHECKING(whether WINDOW has _flags)
+AC_CACHE_VAL(ac_cv_window_has_flags,
+AC_TRY_COMPILE([#include <curses.h>], [
+  WINDOW *w;
+  w->_flags = 0;
+], ac_cv_window_has_flags=yes,
+   ac_cv_window_has_flags=no,
+   ac_cv_window_has_flags=no))
+AC_MSG_RESULT($ac_cv_window_has_flags)
+
+
+if test "$ac_cv_window_has_flags" = yes
+then
+  AC_DEFINE(WINDOW_HAS_FLAGS, 1, 
+  [Define if WINDOW in curses.h offers a field _flags.])
+fi
+
+AC_MSG_CHECKING(for is_term_resized)
+AC_TRY_COMPILE([#include <curses.h>], void *x=is_term_resized,
+  AC_DEFINE(HAVE_CURSES_IS_TERM_RESIZED, 1, Define if you have the 'is_term_resized' function.)
+  AC_MSG_RESULT(yes),
+  AC_MSG_RESULT(no)
+)
+
+AC_MSG_CHECKING(for resize_term)
+AC_TRY_COMPILE([#include <curses.h>], void *x=resize_term,
+  AC_DEFINE(HAVE_CURSES_RESIZE_TERM, 1, Define if you have the 'resize_term' function.)
+  AC_MSG_RESULT(yes),
+  AC_MSG_RESULT(no)
+)
+
+AC_MSG_CHECKING(for resizeterm)
+AC_TRY_COMPILE([#include <curses.h>], void *x=resizeterm,
+  AC_DEFINE(HAVE_CURSES_RESIZETERM, 1, Define if you have the 'resizeterm' function.)
+  AC_MSG_RESULT(yes),
+  AC_MSG_RESULT(no)
+)
+
+AC_MSG_CHECKING(for /dev/ptmx)
+
+if test -r /dev/ptmx
+then
+  AC_MSG_RESULT(yes)
+  AC_DEFINE(HAVE_DEV_PTMX, 1,
+  [Define if we have /dev/ptmx.])
+else
+  AC_MSG_RESULT(no)
+fi
+
+AC_MSG_CHECKING(for /dev/ptc)
+
+if test -r /dev/ptc
+then
+  AC_MSG_RESULT(yes)
+  AC_DEFINE(HAVE_DEV_PTC, 1,
+  [Define if we have /dev/ptc.])
+else
+  AC_MSG_RESULT(no)
+fi
+
+AC_MSG_CHECKING(for %zd printf() format support)
+AC_TRY_RUN([#include <stdio.h>
+#include <stddef.h>
+#include <string.h>
+
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+
+#ifdef HAVE_SSIZE_T
+typedef ssize_t Py_ssize_t;
+#elif SIZEOF_VOID_P == SIZEOF_LONG
+typedef long Py_ssize_t;
+#else
+typedef int Py_ssize_t;
+#endif
+
+int main()
+{
+    char buffer[256];
+
+    if(sprintf(buffer, "%zd", (size_t)123) < 0)
+       	return 1;
+
+    if (strcmp(buffer, "123"))
+	return 1;
+
+    if (sprintf(buffer, "%zd", (Py_ssize_t)-123) < 0)
+       	return 1;
+
+    if (strcmp(buffer, "-123"))
+	return 1;
+
+    return 0;
+}],
+[AC_MSG_RESULT(yes)
+ AC_DEFINE(PY_FORMAT_SIZE_T, "z", [Define to printf format modifier for Py_ssize_t])],
+ AC_MSG_RESULT(no))
+
+AC_CHECK_TYPE(socklen_t,,
+  AC_DEFINE(socklen_t,int,
+            Define to `int' if <sys/socket.h> does not define.),[
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+])
+
+AC_MSG_CHECKING(for broken mbstowcs)
+AC_TRY_RUN([
+#include<stdlib.h>
+int main() {
+    size_t len = -1;
+    const char *str = "text";
+    len = mbstowcs(NULL, str, 0);
+    return (len != 4);
+}
+],
+ac_cv_broken_mbstowcs=no,
+ac_cv_broken_mbstowcs=yes,
+ac_cv_broken_mbstowcs=no)
+AC_MSG_RESULT($ac_cv_broken_mbstowcs)
+if test "$ac_cv_broken_mbstowcs" = yes
+then
+  AC_DEFINE(HAVE_BROKEN_MBSTOWCS, 1,
+  [Define if mbstowcs(NULL, "text", 0) does not return the number of 
+   wide chars that would be converted.])
+fi
+
+# Check for --with-computed-gotos
+AC_MSG_CHECKING(for --with-computed-gotos)
+AC_ARG_WITH(computed-gotos,
+            AC_HELP_STRING(--with-computed-gotos,
+                           Use computed gotos / threaded dispatch in evaluation loop (not available on all compilers)),
+[
+if test "$withval" != no
+then 
+  AC_DEFINE(USE_COMPUTED_GOTOS, 1,
+  [Define if you want to use computed gotos in ceval.c.]) 
+  AC_MSG_RESULT(yes)
+else AC_MSG_RESULT(no)
+fi],
+[AC_MSG_RESULT(no)])
+
+if test $ac_sys_system = Darwin
+then
+	LIBS="$LIBS -framework CoreFoundation"
+fi
+
+
+
+AC_SUBST(THREADHEADERS)
+
+for h in `(cd $srcdir;echo Python/thread_*.h)`
+do
+  THREADHEADERS="$THREADHEADERS \$(srcdir)/$h"
+done
+
+AC_SUBST(SRCDIRS)
+SRCDIRS="Parser Grammar Objects Python Modules Mac"
+AC_MSG_CHECKING(for build directories)
+for dir in $SRCDIRS; do
+    if test ! -d $dir; then
+        mkdir $dir
+    fi
+done
+AC_MSG_RESULT(done)
+
+# generate output files
+AC_CONFIG_FILES(Makefile.pre Modules/Setup.config Misc/python.pc)
+AC_CONFIG_FILES([Modules/ld_so_aix], [chmod +x Modules/ld_so_aix])
+AC_OUTPUT
+
+echo "creating Modules/Setup"
+if test ! -f Modules/Setup
+then
+	cp $srcdir/Modules/Setup.dist Modules/Setup
+fi
+
+echo "creating Modules/Setup.local"
+if test ! -f Modules/Setup.local
+then
+	echo "# Edit this file for local setup changes" >Modules/Setup.local
+fi
+
+echo "creating Makefile"
+$SHELL $srcdir/Modules/makesetup -c $srcdir/Modules/config.c.in \
+			-s Modules Modules/Setup.config \
+			Modules/Setup.local Modules/Setup
+mv config.c Modules