dnl Process this file with autoconf 2.0 or later to make a configure script.
AC_REVISION($Revision$)
AC_PREREQ(2.50)
AC_INIT(Include/object.h)
AC_CONFIG_HEADER(pyconfig.h)

# This is for stuff that absolutely must end up in pyconfig.h.
# Please use pyport.h instead, if possible.
AH_BOTTOM([
#ifdef __CYGWIN__
#ifdef USE_DL_IMPORT
#define DL_IMPORT(RTYPE) __declspec(dllimport) RTYPE
#define DL_EXPORT(RTYPE) __declspec(dllexport) RTYPE
#else
#define DL_IMPORT(RTYPE) __declspec(dllexport) RTYPE
#define DL_EXPORT(RTYPE) __declspec(dllexport) RTYPE
#endif
#endif

/* 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
])

# Set VERSION so we only need to edit in one place (i.e., here)
AC_SUBST(VERSION)
VERSION=2.3

AC_SUBST(SOVERSION)
SOVERSION=1.0

# Arguments passed to configure.
AC_SUBST(CONFIG_ARGS)
CONFIG_ARGS="$ac_configure_args"


AC_ARG_ENABLE(framework,
[  --enable-framework[=INSTALLDIR] Build (MacOSX|Darwin) framework],[
	case $enableval in
	yes) 
		enableval=/Library/Frameworks
	esac
	case $enableval in
	no)
		PYTHONFRAMEWORK=
		PYTHONFRAMEWORKDIR=no-framework
		PYTHONFRAMEWORKPREFIX=
		PYTHONFRAMEWORKINSTALLDIR=
		enable_framework=
		;;
	*)
		PYTHONFRAMEWORK=Python
		PYTHONFRAMEWORKDIR=Python.framework
		PYTHONFRAMEWORKPREFIX=$enableval
		PYTHONFRAMEWORKINSTALLDIR=$PYTHONFRAMEWORKPREFIX/$PYTHONFRAMEWORKDIR
		prefix=$PYTHONFRAMEWORKINSTALLDIR/Versions/$VERSION
	esac
	],[
	PYTHONFRAMEWORK=
	PYTHONFRAMEWORKDIR=no-framework
	PYTHONFRAMEWORKPREFIX=
	PYTHONFRAMEWORKINSTALLDIR=
	enable_framework=
])
AC_SUBST(PYTHONFRAMEWORK)
AC_SUBST(PYTHONFRAMEWORKDIR)
AC_SUBST(PYTHONFRAMEWORKPREFIX)
AC_SUBST(PYTHONFRAMEWORKINSTALLDIR)

##AC_ARG_WITH(dyld,
##[  --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" = "Monterey64"; 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";;
	'')	MACHDEP="unknown";;
	esac
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)

# checks for alternative programs
AC_MSG_CHECKING(for --without-gcc)
AC_ARG_WITH(gcc, [  --without-gcc                   never use gcc], [
	case $withval in
	no)	CC=cc
		without_gcc=yes;;
	yes)	CC=gcc
		without_gcc=no;;
	*)	CC=$withval
		without_gcc=$withval;;
	esac], [
	case $ac_sys_system in
	AIX*)   CC=cc_r
		without_gcc=;;
	BeOS*)
		case $BE_HOST_CPU in
		ppc)
			CC=mwcc
			without_gcc=yes
			OPT="-O -D'DL_EXPORT(RTYPE)=__declspec(dllexport) RTYPE' -D'DL_IMPORT(RTYPE)=__declspec(dllexport) RTYPE' -export pragma"
			CCSHARED="-UDL_IMPORT -D'DL_IMPORT(RTYPE)=__declspec(dllimport) RTYPE'"
			LDFLAGS="$LDFLAGS -nodup"
			;;
		x86)
			CC=gcc
			without_gcc=no
			OPT=-O
			;;
		*)
			AC_ERROR(Unknown BeOS platform \"$BE_HOST_CPU\")
			;;
		esac
		AR="\$(srcdir)/Modules/ar_beos"
		RANLIB=:
		;;
    Monterey*)
        RANLIB=:
        without_gcc=;;
	*)	without_gcc=no;;
	esac])
AC_MSG_RESULT($without_gcc)

AC_SUBST(CXX)
AC_SUBST(MAINOBJ)
MAINOBJ=python.o
AC_MSG_CHECKING(for --with-cxx=<compiler>)
AC_ARG_WITH(cxx, [  --with-cxx=<compiler>           enable C++ support],[
	check_cxx=no
	case $withval in
	no)	CXX=
		with_cxx=no;;
	*)	CXX=$withval
		MAINOBJ=ccpython.o
		with_cxx=$withval;;
	esac], [
	with_cxx=no
	check_cxx=yes
])
AC_MSG_RESULT($with_cxx)

if test "$with_cxx" = "yes"
then
	AC_ERROR(must supply a compiler when using --with-cxx)
fi

dnl The following fragment works similar to AC_PROG_CXX.
dnl It does not fail if CXX is not found, and it is not executed if 
dnl --without-cxx was given.
dnl Finally, it does not test whether CXX is g++.

dnl Autoconf 2.5x does not have AC_PROG_CXX_WORKS anymore
ifdef([AC_PROG_CXX_WORKS],[],
      [AC_DEFUN([AC_PROG_CXX_WORKS],
      [AC_LANG_PUSH(C++)dnl
       _AC_COMPILER_EXEEXT
       AC_LANG_POP()
      ]
)])

if test "$check_cxx" = "yes" 
then
	AC_CHECK_PROGS(CXX, $CCC c++ g++ gcc CC cxx cc++ cl, notfound)
	if test "$CXX" = "notfound"
	then
		CXX=
	else
		AC_PROG_CXX_WORKS
	fi
fi

# 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_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

# checks for UNIX variants that set C preprocessor variables
AC_AIX
AC_MINIX

AC_EXEEXT
AC_MSG_CHECKING(for --with-suffix)
AC_ARG_WITH(suffix, [  --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 "python"
then
    AC_MSG_RESULT(yes)
    BUILDEXEEXT=.exe
else
	AC_MSG_RESULT(no)
	BUILDEXEEXT=$EXEEXT
fi

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;;
Monterey*)
    case $CC in
    cc) CC="$CC -Wl,-Bexport";;
    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)'
INSTSONMAE='$(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
        if test -z "$CXX"; then
              LINKCC="\$(PURIFY) \$(CC)"
        else
              echo 'int main(){return 0;}' > conftest.$ac_ext
              $CXX -c conftest.$ac_ext 2>&5
              if $CC -o conftest$ac_exeext conftest.$ac_objext 2>&5 \
                 && test -s conftest$ac_exeext && ./conftest$ac_exeext
              then
                 LINKCC="\$(PURIFY) \$(CC)"
              else
                 LINKCC="\$(PURIFY) \$(CXX)"
              fi
              rm -fr conftest*
        fi
	case $ac_sys_system in
	AIX*)
	   LINKCC="\$(srcdir)/Modules/makexp_aix Modules/python.exp \"\" \$(LIBRARY); $LINKCC";;
	dgux*)
	   LINKCC="LD_RUN_PATH=$libdir $LINKCC";;
	Monterey64*)
	   LINKCC="$LINKCC -L/usr/lib/ia64l64";;
	esac
fi
AC_MSG_RESULT($LINKCC)

AC_MSG_CHECKING(for --enable-shared)
AC_ARG_ENABLE(shared,
[  --enable-shared                 disable/enable building shared python library])

if test -z "$enable_shared"
then 
  enable_shared="no"
fi
AC_MSG_RESULT($enable_shared)


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)'
  LDLIBRARYDIR='$(PYTHONFRAMEWORKDIR)'
  BLDLIBRARY=''
else
  BLDLIBRARY='$(LDLIBRARY)'
fi  

# Other platforms follow
if test $enable_shared = "yes"; then
  case $ac_sys_system in
    BeOS*)
          LDLIBRARY='libpython$(VERSION).so'
          ;;
    CYGWIN*)
          LDLIBRARY='libpython$(VERSION).dll.a'
          DLLLIBRARY='libpython$(VERSION).dll'
          ;;
    SunOS*)
	  LDLIBRARY='libpython$(VERSION).so'
	  BLDLIBRARY='-Wl,-rpath,$(LIBDIR) -L. -lpython$(VERSION)'
	  RUNSHARED=LD_LIBRARY_PATH=`pwd`:$LD_LIBRARY_PATH
          ;;
    Linux*)
	  LDLIBRARY='libpython$(VERSION).so'
	  BLDLIBRARY='-L. -lpython$(VERSION)'
	  RUNSHARED=LD_LIBRARY_PATH=`pwd`:$LD_LIBRARY_PATH
	  INSTSONAME="$LDLIBRARY".$SOVERSION
	  ;;
    hp*|HP*)
	  LDLIBRARY='libpython$(VERSION).sl'
	  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
	  ;;
  esac
  # DG/UX requires some fancy ld contortions to produce a .so from an .a
  case $MACHDEP in
  dguxR4)
        LDLIBRARY='libpython$(VERSION).so'
        OPT="$OPT -pic"
        ;;
  esac
fi

AC_MSG_RESULT($LDLIBRARY)

AC_PROG_RANLIB
AC_SUBST(AR)
AC_CHECK_PROGS(AR, ar aal, ar)

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
		BeOS*) LN="ln -s";;
		CYGWIN*) LN="ln -s";;
		*) LN=ln;;
	esac
fi

# Check for --with-pydebug
AC_MSG_CHECKING(for --with-pydebug)
AC_ARG_WITH(pydebug, 
[  --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)])

# Optimizer/debugger flags
AC_SUBST(OPT)
if test -z "$OPT"
then
	case $GCC in
	yes)
		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 -Wstrict-prototypes"
	    else
		OPT="-g -O3 -Wall -Wstrict-prototypes"
	    fi;;
	*)
	    OPT="-O3 -Wall -Wstrict-prototypes";;
	esac
	;;
    *)
	case $ac_sys_system in
	OpenUNIX*|UnixWare*)
	    OPT="-O -K pentium,host,inline,loop_unroll,alloca ";;
	*)
	    OPT="-O";;
	esac
    esac
    case $ac_sys_system in
    Darwin*)
    	OPT="$OPT -Wno-long-double -no-cpp-precomp";;
    esac
fi

if test "$Py_DEBUG" = 'true'; then
  :
else
  OPT="-DNDEBUG $OPT"
fi

# The current (beta) Monterey compiler dies with optimizations
case $ac_sys_system in
Monterey*) OPT="";;
esac

if test "$ac_arch_flags"
then
	OPT="$OPT $ac_arch_flags"
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 $ac_sys_system in
      Darwin*) OPT="$OPT" ;;
      *) OPT="$OPT -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 $ac_cv_olimit_ok = yes; then
    OPT="$OPT -Olimit 1500"
  fi
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_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

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(dlfcn.h fcntl.h grp.h limits.h langinfo.h \
libintl.h locale.h ncurses.h poll.h pthread.h \
signal.h stdarg.h stddef.h stdlib.h thread.h unistd.h utime.h termios.h \
sys/audioio.h sys/file.h sys/lock.h sys/modem.h db_185.h db.h \
sys/param.h sys/poll.h sys/select.h sys/socket.h sys/time.h sys/times.h \
sys/un.h sys/utsname.h sys/wait.h pty.h term.h libutil.h \
ndbm.h db1/ndbm.h gdbm/ndbm.h sys/resource.h netpacket/packet.h)
AC_HEADER_DIRENT

# 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)

# Two defines needed to enable largefile support on various platforms
# These may affect some typedefs
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.])

# 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

# Sizes of various common basic types
AC_CHECK_SIZEOF(int, 4)
AC_CHECK_SIZEOF(long, 4)
AC_CHECK_SIZEOF(void *, 4)
AC_CHECK_SIZEOF(char, 1)
AC_CHECK_SIZEOF(short, 2)
AC_CHECK_SIZEOF(float, 4)
AC_CHECK_SIZEOF(double, 8)
AC_CHECK_SIZEOF(fpos_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 uintptr_t support)
have_uintptr_t=no
AC_TRY_COMPILE([], [uintptr_t x; x = (uintptr_t)0;], [
  AC_DEFINE(HAVE_UINTPTR_T, 1, [Define this if you have the type uintptr_t.]) 
  have_uintptr_t=yes
])
AC_MSG_RESULT($have_uintptr_t)
if test "$have_uintptr_t" = yes ; then
AC_CHECK_SIZEOF(uintptr_t, 4)
fi

# 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 "$have_long_long" = yes -a \
	"$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

# 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="$CC -Kpthread"
fi
AC_MSG_CHECKING(for pthread_t)
have_pthread_t=no
AC_TRY_COMPILE([#include <pthread.h>], [pthread_t x; x = *(pthread_t*)0;], have_pthread_t=yes)
AC_MSG_RESULT($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_MSG_CHECKING(for --enable-toolbox-glue)
AC_ARG_ENABLE(toolbox-glue,
[  --enable-toolbox-glue            disable/enable MacOSX glue code for extensions])

if test -z "$enable_toolbox_glue"
then 
	case $ac_sys_system/$ac_sys_release in
	Darwin/*)
		enable_toolbox_glue="yes";;
	*)
		enable_toolbox_glue="no";;
	esac
fi
case "$enable_toolbox_glue" in
yes)
	extra_frameworks="-framework CoreServices -framework Foundation"
	extra_machdep_objs="Python/mactoolboxglue.o"
	extra_undefs="-u __dummy -u _PyMac_Error"
	AC_DEFINE(USE_TOOLBOX_OBJECT_GLUE, 1,
         [Define if you want to use MacPython modules on MacOSX in unix-Python.])
	;;
*)
	extra_frameworks=""
	extra_machdep_objs=""
	extra_undefs=""
	;;
esac
AC_MSG_RESULT($enable_toolbox_glue)

AC_SUBST(LIBTOOL_CRUFT)
case $ac_sys_system/$ac_sys_release in
  Darwin/1.3*)
    ns_undef_sym='_environ'
    LIBTOOL_CRUFT="-lcc_dynamic -arch_only ppc -U $ns_undef_sym"
   	LIBTOOL_CRUFT="$LIBTOOL_CRUFT $extra_frameworks"
    LIBTOOL_CRUFT=$LIBTOOL_CRUFT' -install_name $(PYTHONFRAMEWORKDIR)/Versions/$(VERSION)/Python'
    LIBTOOL_CRUFT=$LIBTOOL_CRUFT' -compatibility_version $(VERSION) -current_version $(VERSION)';;
  Darwin/*)
    ns_undef_sym='_environ'
    LIBTOOL_CRUFT="-lcc_dynamic -arch_only ppc -flat_namespace -U $ns_undef_sym"
      LIBTOOL_CRUFT="$LIBTOOL_CRUFT $extra_frameworks"
    LIBTOOL_CRUFT=$LIBTOOL_CRUFT' -install_name $(PYTHONFRAMEWORKDIR)/Versions/$(VERSION)/Python'
    LIBTOOL_CRUFT=$LIBTOOL_CRUFT' -compatibility_version $(VERSION) -current_version $(VERSION)';;
esac

AC_MSG_CHECKING(for --enable-framework)
if test "$enable_framework"
then
	OPT="$OPT -fno-common -dynamic"
	# -U __environ is needed since bundles don't have access
	# to crt0 when built but will always be linked against it
	# -F. is needed to allow linking to the framework while 
	# in the build location.
	
	case $ac_sys_system/$ac_sys_release in
	    Darwin/1.3*)LDFLAGS="$LDFLAGS -Wl,-F. -Wl,-U,$ns_undef_sym";;
	    Darwin/*)LDFLAGS="$LDFLAGS -Wl,-F. -Wl,-flat_namespace,-U,$ns_undef_sym";;
	esac
	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)
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 $ac_sys_system in
	hp*|HP*)   SO=.sl;;
	CYGWIN*)   SO=.dll;;
	*)	   SO=.so;;
	esac
fi
AC_MSG_RESULT($SO)
# LDSHARED is the ld *command* used to create shared library
# -- "ld" on SunOS 4.x.x, "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:Modules/python.exp"
		LDSHARED="\$(BINLIBDEST)/config/ld_so_aix \$(CC) -bI:\$(BINLIBDEST)/config/python.exp"
		;;
	BeOS*)
		BLDSHARED="\$(srcdir)/Modules/ld_so_beos $LDLIBRARY"
		LDSHARED="\$(BINLIBDEST)/config/ld_so_beos \$(LIBDIR)/$LDLIBRARY"
		;;
	IRIX/5*) LDSHARED="ld -shared";;
	IRIX*/6*) LDSHARED="ld ${SGI_ABI} -shared -all";;
	SunOS/4*) LDSHARED="ld";;
	SunOS/5*) 
		if test "$GCC" = "yes"
		then LDSHARED='$(CC) -shared'
		else LDSHARED="$(CC) -G";
		fi ;;
	hp*|HP*) LDSHARED="ld -b";;
	OSF*) LDSHARED="ld -shared -expect_unresolved \"*\"";;
	DYNIX/ptx*) LDSHARED="ld -G";;
	Darwin/1.3*)
		LDSHARED='$(CC) $(LDFLAGS) -bundle'
		if test "$enable_framework" ; then
			# Link against the framework. All externals should be defined.
			LDSHARED="$LDSHARED "'-framework $(PYTHONFRAMEWORK)'
		else
			# No framework. Ignore undefined symbols, assuming they come from Python
			LDSHARED="$LDSHARED -undefined suppress"
		fi ;;
	Darwin/*)
		LDSHARED='$(CC) $(LDFLAGS) -bundle'
		if test "$enable_framework" ; then
			# Link against the framework. All externals should be defined.
			LDSHARED="$LDSHARED "'-framework $(PYTHONFRAMEWORK)'
		else
			# No framework, use the Python app as bundle-loader
			BLDSHARED="$LDSHARED "'-bundle_loader $(BUILDPYTHON)'
			LDSHARED="$LDSHARED "'-bundle_loader $(BINDIR)/$(PYTHON)'
		fi ;;
	Linux*|GNU*) LDSHARED="gcc -shared";;
	dgux*) LDSHARED="ld -G";;
	BSD/OS*/4*) LDSHARED="gcc -shared";;
	OpenBSD*|NetBSD*|FreeBSD*)
		if [[ "`$CC -dM -E - </dev/null | grep __ELF__`" != "" ]]
		then
			LDSHARED="cc -shared ${LDFLAGS}"
		else
			LDSHARED="ld -Bshareable ${LDFLAGS}"
		fi;;
	OpenUNIX*|UnixWare*)
		if test "$GCC" = "yes"
		then LDSHARED="$(CC) -shared"
		else LDSHARED="$(CC) -G"
		fi;;
	SCO_SV*) LDSHARED="cc -G -KPIC -Ki486 -belf -Wl,-Bexport";;
	Monterey*) LDSHARED="cc -G -dy -Bdynamic -Bexport -L/usr/lib/ia64l64";;
	CYGWIN*) LDSHARED="gcc -shared -Wl,--enable-auto-image-base";;
	*)	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 "$GCC" = yes;
	        then CCSHARED="-fPIC";
	        fi;;
	hp*|HP*) if test "$GCC" = yes;
		 then CCSHARED="-fPIC";
		 else CCSHARED="+z";
		 fi;;
	Linux*|GNU*) CCSHARED="-fPIC";;
	BSD/OS*/4*) CCSHARED="-fpic";;
	FreeBSD*|NetBSD*|OpenBSD*) CCSHARED="-fPIC";;
	OpenUNIX*|UnixWare*)
		if test "$GCC" = "yes"
		then CCSHARED="-fPIC"
		else CCSHARED="-KPIC"
		fi;;
	SCO_SV*) CCSHARED="-KPIC -dy -Bdynamic";;
	Monterey*) CCSHARED="-G";;
	IRIX*/6*)  case $CC in
		   *gcc*) CCSHARED="-shared";;
		   *) CCSHARED="";;
		   esac;;
	CYGWIN*) CCSHARED="-DUSE_DL_IMPORT";;
	esac
fi
AC_MSG_RESULT($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/*) 
		# -u __dummy makes the linker aware of the objc runtime
		# in System.framework; otherwise, __objcInit (referenced in
		# crt1.o) gets erroneously defined as common, which breaks dynamic
		# loading of any modules which reference it in System.framework.
		# -u _PyMac_Error is needed to pull in the mac toolbox glue, which is
		# not used by the core itself but which needs to be in the core so
		# that dynamically loaded extension modules have access to it.
		LINKFORSHARED="$extra_undefs -framework System"
		if test "$enable_framework"
		then
			LINKFORSHARED="$LINKFORSHARED -framework Python"
		fi
		LINKFORSHARED="$LINKFORSHARED $extra_frameworks";;
	OpenUNIX*|UnixWare*) LINKFORSHARED="-Wl,-Bexport";;
	SCO_SV*) LINKFORSHARED="-Bdynamic -dy -Wl,-Bexport";;
	ReliantUNIX*) LINKFORSHARED="-W1 -Blargedynsym";;
	FreeBSD*|NetBSD*|OpenBSD*) 
		if [[ "`$CC -dM -E - </dev/null | grep __ELF__`" != "" ]]
		then
			LINKFORSHARED="-Wl,--export-dynamic"
		fi;;
	SunOS/5*) case $CC in
		  *gcc*)
		    if $CC -Xlinker -V 2>&1 | grep BFD >/dev/null
		    then
			LINKFORSHARED="-Xlinker --export-dynamic"
		    fi;;
		  esac;;
	esac
fi
AC_MSG_RESULT($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)

# 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
AC_CHECK_LIB(rt, sem_init)	# 'Real Time' functions on Solaris

# 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 "/usr/lpp/xlC/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.
# However on SGI IRIX, these exist but are broken.
# BeOS' sockets are stashed in libnet.
case "$ac_sys_system" in
IRIX*) ;;
*)
AC_CHECK_LIB(nsl, t_open, [LIBS="-lnsl $LIBS"]) # SVR4
AC_CHECK_LIB(socket, socket, [LIBS="-lsocket $LIBS"], [], $LIBS) # SVR4 sockets
;;
esac
case "$ac_sys_system" in
BeOS*)
AC_CHECK_LIB(net, socket, [LIBS="-lnet $LIBS"], [], $LIBS) # BeOS
;;
esac

AC_MSG_CHECKING(for --with-libs)
AC_ARG_WITH(libs,
[  --with-libs='lib1 ...'          link against additional libs], [
AC_MSG_RESULT($withval)
LIBS="$withval $LIBS"
], AC_MSG_RESULT(no))

# 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,
[  --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,
[  --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)
AC_ARG_WITH(threads,
[  --with(out)-threads[=DIRECTORY] disable/enable thread support])

# --with-thread is deprecated, but check for it anyway
AC_ARG_WITH(thread,
[  --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"
    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 (which ones?)
    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="$LIBS -lthreads"
    THREADOBJ="Python/thread.o"],[
    AC_CHECK_HEADER(mach/cthreads.h, [AC_DEFINE(WITH_THREAD)
    AC_DEFINE(C_THREADS)
    AC_DEFINE(MACH_C_THREADS, 1,
    [Define if you are using Mach cthreads under mach /])
    THREADOBJ="Python/thread.o"],[
    AC_MSG_CHECKING(for --with-pth)
    AC_ARG_WITH(pth,
    [  --with-pth                      use GNU pth threading libraries], [
    AC_MSG_RESULT($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=$_libs
    AC_CHECK_FUNC(pthread_detach, [AC_DEFINE(WITH_THREAD)
    posix_threads=yes
    THREADOBJ="Python/thread.o"],[
    AC_CHECK_HEADER(kernel/OS.h, [AC_DEFINE(WITH_THREAD)
    AC_DEFINE(BEOS_THREADS, 1,
    [Define this if you have BeOS threads.])
    THREADOBJ="Python/thread.o"],[
    AC_CHECK_LIB(pthreads, pthread_create, [AC_DEFINE(WITH_THREAD)
    posix_threads=yes
    LIBS="$LIBS -lpthreads"
    THREADOBJ="Python/thread.o"], [
    AC_CHECK_LIB(c_r, pthread_create, [AC_DEFINE(WITH_THREAD)
    posix_threads=yes
    LIBS="$LIBS -lc_r"
    THREADOBJ="Python/thread.o"], [
    AC_CHECK_LIB(thread, __d6_pthread_create, [AC_DEFINE(WITH_THREAD)
    posix_threads=yes
    LIBS="$LIBS -lthread"
    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="#"])
    ])])])])])])])])])])

    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

      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)
    fi

    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

# 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
				OPT="-I/usr/inet6/include $OPT"
			fi
			;;
		solaris)
			if test -f /etc/netconfig; then
                          if /usr/xpg4/bin/grep -q tcp6 /etc/netconfig; then
				ipv6type=$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;
				OPT="-I/usr/local/v6/include $OPT"])
			;;
		zeta)
			AC_EGREP_CPP(yes, [
#include <sys/param.h>
#ifdef _ZETA_MINAMI_INET6
yes
#endif],
				[ipv6type=$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

# Check for GC support
AC_MSG_CHECKING(for --with-cycle-gc)
AC_ARG_WITH(cycle-gc,
[  --with(out)-cycle-gc            disable/enable garbage collection])

if test -z "$with_cycle_gc"
then with_cycle_gc="yes"
fi
if test "$with_cycle_gc" != "no"
then
    AC_DEFINE(WITH_CYCLE_GC, 1, 
     [Define if you want to compile in cycle garbage collection.])
fi
AC_MSG_RESULT($with_cycle_gc)

# Check for Python-specific malloc support
AC_MSG_CHECKING(for --with-pymalloc)
AC_ARG_WITH(pymalloc,
[  --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, 
[  --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=.

AC_MSG_CHECKING(for --with-sgi-dl)
AC_ARG_WITH(sgi-dl,
[  --with-sgi-dl=DIRECTORY         IRIX 4 dynamic linking], [
AC_MSG_RESULT($withval)
AC_DEFINE(WITH_SGI_DL, 1,
  [Define if you want to use SGI (IRIX 4) dynamic linking.
   This requires the "dl" library by Jack Jansen,
   ftp://ftp.cwi.nl/pub/dynload/dl-1.6.tar.Z.
   Do not bother on IRIX 5, it already has dynamic linking using SunOS
   style shared libraries])
DYNLOADFILE="dynload_dl.o"
dldir=$withval
if test ! -z "$dldir" -a -d "$dldir"
then LDFLAGS="$LDFLAGS -L$dldir"
else AC_ERROR(proper usage is --with-sgi-dl=DIRECTORY)
fi
DLINCLDIR=${dldir}
LIBS="$LIBS -ldl -lmld"], AC_MSG_RESULT(no))

AC_MSG_CHECKING(for --with-dl-dld)
AC_ARG_WITH(dl-dld, [  --with-dl-dld=DL_DIR,DLD_DIR    GNU dynamic linking], [
AC_MSG_RESULT($withval)
AC_DEFINE(WITH_DL_DLD, 1, 
  [Define if you want to emulate SGI (IRIX 4) dynamic linking.
   This is rumoured to work on VAX (Ultrix), Sun3 (SunOS 3.4),
   Sequent Symmetry (Dynix), and Atari ST.
   This requires the 'dl-dld' library,
   ftp://ftp.cwi.nl/pub/dynload/dl-dld-1.1.tar.Z,
   as well as the 'GNU dld' library,
   ftp://ftp.cwi.nl/pub/dynload/dld-3.2.3.tar.Z.
   Do not bother on SunOS 4 or 5, they already have dynamic linking using
   shared libraries.])
DYNLOADFILE="dynload_dl.o"
dldir=`echo "$withval" | sed 's/,.*//'`
dlddir=`echo "$withval" | sed 's/.*,//'`
if test ! -z "$dldir" -a -d "$dldir" -a ! -z "$dlddir" -a -d "$dlddir"
then LDFLAGS="$LDFLAGS -L$dldir -L$dlddir"
else AC_ERROR(proper usage is --with-dl-dld=DL_DIRECTORY,DLD_DIRECTORY)
fi
DLINCLDIR=${dldir}
LIBS="$LIBS -ldl -ldld"], AC_MSG_RESULT(no))

# 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*) DYNLOADFILE="dynload_aix.o";;
	BeOS*) DYNLOADFILE="dynload_beos.o";;
	hp*|HP*) DYNLOADFILE="dynload_hpux.o";;
	Darwin/*) DYNLOADFILE="dynload_next.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 chown chroot clock confstr ctermid ctermid_r execv \
 flock fork fsync fdatasync fpathconf ftime ftruncate \
 gai_strerror getgroups getlogin getpeername getpid getpwent getwd \
 hstrerror inet_pton kill killpg link lstat mkfifo mktime mremap \
 nice pathconf pause plock poll pthread_init \
 putenv readlink \
 select setegid seteuid setgid setgroups \
 setlocale setregid setreuid setsid setpgid setuid setvbuf snprintf \
 sigaction siginterrupt sigrelse strftime strptime symlink sysconf \
 tcgetpgrp tcsetpgrp tempnam timegm times tmpfile tmpnam tmpnam_r \
 truncate uname unsetenv waitpid _getpty getpriority)

# check for openpty and forkpty

AC_CHECK_FUNCS(openpty,, AC_CHECK_LIB(util,openpty, [AC_DEFINE(HAVE_OPENPTY) LIBS="$LIBS -lutil"]))
AC_CHECK_FUNCS(forkpty,, AC_CHECK_LIB(util,forkpty, [AC_DEFINE(HAVE_FORKPTY) LIBS="$LIBS -lutil"]))

# check for long file support functions
AC_CHECK_FUNCS(fseek64 fseeko fstatvfs ftell64 ftello statvfs)

AC_REPLACE_FUNCS(dup2 getcwd strdup strerror memmove)
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)])
  )
)


# 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;
    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_STRUCT_ST_RDEV
AC_STRUCT_ST_BLKSIZE
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)

if test "$have_prototypes" = yes; then
bad_prototypes=no
AC_MSG_CHECKING(for bad exec* prototypes)
AC_TRY_COMPILE([#include <unistd.h>], [char **t;execve("@",t,t);], ,
    AC_DEFINE(BAD_EXEC_PROTOTYPES, 1,
    [Define if your <unistd.h> contains bad prototypes for exec*()
    (as it does on SGI IRIX 4.x)]) 
    bad_prototypes=yes
)
AC_MSG_RESULT($bad_prototypes)
fi

# 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))

AC_MSG_CHECKING(for bad static forward)
AC_CACHE_VAL(ac_cv_bad_static_forward,
[AC_TRY_RUN([
struct s { int a; int b; };
static struct s foo;
int foobar() {
 static int random;
 random = (int) &foo;
 return random;
}
static struct s foo = { 1, 2 };
main() {
 exit(!((int)&foo == foobar()));
}],
ac_cv_bad_static_forward=no,
ac_cv_bad_static_forward=yes,
ac_cv_bad_static_forward=no)])
AC_MSG_RESULT($ac_cv_bad_static_forward)
if test "$ac_cv_bad_static_forward" = yes
then
    AC_DEFINE(BAD_STATIC_FORWARD, 1, 
    [Define if your compiler botches static forward declarations
    (as it does on SCI ODT 3.0)])
fi

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,
[  --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 $ac_sys_system in
Darwin) ;;
BeOS) ;;
*) LIBM=-lm
esac
AC_MSG_CHECKING(for --with-libm=STRING)
AC_ARG_WITH(libm, [  --with-libm=STRING              math library], [
if test "$withval" = no
then LIBM=
     AC_MSG_RESULT(force LIBM empty)
elif test "$withval" != yes
then LIBM=$withval
     AC_MSG_RESULT(set LIBM=\"$withval\")
else AC_ERROR(proper usage is --with-libm=STRING)
fi],
[AC_MSG_RESULT(default LIBM=\"$LIBM\")])

# check for --with-libc=...
AC_SUBST(LIBC)
AC_MSG_CHECKING(for --with-libc=STRING)
AC_ARG_WITH(libc, [  --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_ERROR(proper usage is --with-libc=STRING)
fi],
[AC_MSG_RESULT(default LIBC=\"$LIBC\")])

# check for hypot() in math library
LIBS_SAVE=$LIBS
LIBS="$LIBS $LIBM"
AC_REPLACE_FUNCS(hypot)
LIBS=$LIBS_SAVE

# check whether malloc(0) returns NULL or not
AC_MSG_CHECKING(what malloc(0) returns)
AC_CACHE_VAL(ac_cv_malloc_zero,
[AC_TRY_RUN([#include <stdio.h>
#ifdef HAVE_STDLIB
#include <stdlib.h>
#else
char *malloc(), *realloc();
int *free();
#endif
main() {
	char *p;
	p = malloc(0);
	if (p == NULL) exit(1);
	p = realloc(p, 0);
	if (p == NULL) exit(1);
	free(p);
	exit(0);
}],
ac_cv_malloc_zero=nonnull,
ac_cv_malloc_zero=null,
ac_cv_malloc_zero=nonnull)]) # XXX arm cross-compile?
AC_MSG_RESULT($ac_cv_malloc_zero)
if test "$ac_cv_malloc_zero" = null
then
  AC_DEFINE(MALLOC_ZERO_RETURNS_NULL, 1,
  [Define if malloc(0) returns a NULL pointer.])
fi

# 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(what type to use for unicode)
AC_ARG_ENABLE(unicode, 
[  --enable-unicode[=ucs2,ucs4]    Enable Unicode strings (default is yes)],,enable_unicode=yes)

if test $enable_unicode = yes
then
  # Without any arguments, Py_UNICODE defaults to two-byte mode
  enable_unicode="ucs2"
fi

AH_TEMPLATE(Py_UNICODE_SIZE,
  [Define as the size of the unicode type.])
case "$enable_unicode" in
ucs2) unicode_size="2"
      AC_DEFINE(Py_UNICODE_SIZE,2)
      ;;
ucs4) unicode_size="4"
      AC_DEFINE(Py_UNICODE_SIZE,4)
      ;;
esac

AH_TEMPLATE(PY_UNICODE_TYPE,
  [Define as the integral type used for Unicode representation.])

AC_SUBST(UNICODE_OBJS)
if test "$enable_unicode" = "no"
then
  UNICODE_OBJS=""
  AC_MSG_RESULT(not used)
else
  UNICODE_OBJS="Objects/unicodeobject.o Objects/unicodectype.o"
  AC_DEFINE(Py_USING_UNICODE, 1,
  [Define if you want to have a Unicode type.])
  if test "$unicode_size" = "$ac_cv_sizeof_wchar_t"
  then
    PY_UNICODE_TYPE="wchar_t"
    AC_DEFINE(HAVE_USABLE_WCHAR_T, 1,
    [Define if you have a useable wchar_t type defined in wchar.h; useable
     means wchar_t must be 16-bit unsigned type. (see
     Include/unicodeobject.h).])
    AC_DEFINE(PY_UNICODE_TYPE,wchar_t)
  elif test "$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)
fi

# 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 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]), , -ltermcap)

# 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]), , -ltermcap)

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

# 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

# THIS MUST BE LAST, IT CAN BREAK OTHER TESTS!
# Add sys/socket.h to confdefs.h
cat >> confdefs.h <<\EOF
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
EOF
AC_CHECK_TYPE(socklen_t, int)

#AC_MSG_CHECKING(for Modules/Setup)
#if test ! -f Modules/Setup ; then
#    if test ! -d Modules ; then
#        mkdir Modules
#    fi
#    cp "$srcdir/Modules/Setup.dist" Modules/Setup
#    AC_MSG_RESULT(creating)
#else
#    AC_MSG_RESULT(already exists)
#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"
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_OUTPUT(Makefile.pre Modules/Setup.config)

echo "creating Setup"
if test ! -f Modules/Setup
then
	cp $srcdir/Modules/Setup.dist Modules/Setup
fi

echo "creating 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