dnl Process this file with autoconf to produce a configure script.
AC_INIT(backend/access/common/heaptuple.c)
AC_PREFIX_DEFAULT(/usr/local/pgsql)

AC_CANONICAL_HOST

tas_file=dummy.s
case "$host_os" in
 solaris*)
	case "$host_cpu" in
	  sparc) os=solaris_sparc need_tas=yes tas_file=solaris_sparc.s ;;
	   i386) os=solaris_sparc need_tas=yes tas_file=solaris_i386.s ;;
	esac ;;
   sunos*) os=sunos4 need_tas=no ;;
     aux*) os=aux need_tas=no ;;
   linux*) os=linux need_tas=no ;;
    bsdi*) os=bsdi need_tas=no ;;
 freebsd*|netbsd*|openbsd*) os=bsd need_tas=no ;;
    dgux*) os=dgux need_tas=no ;;
     aix*) os=aix need_tas=no ;;
nextstep*) os=nextstep need_tas=no ;;
  ultrix*) os=ultrix4 need_tas=no ;;
    irix*) os=irix5 need_tas=no ;;
    hpux*) os=hpux need_tas=yes tas_file=hpux.s ;;
     osf*) os=alpha need_tas=no ;;
     sco*) os=sco need_tas=no ;;
 machten*) os=machten need_tas=no ;;
  cygwin*) os=win need_tas=no ;;
 sysv4.2*)
       case "$host_vendor" in
	       univel) os=univel need_tas=no ;;
		    *) os=unknown need_tas=no ;;
       esac ;;
   sysv4*) os=svr4 need_tas=no ;;
   sysv5*) os=unixware need_tas=no ;;
*) echo ""
   echo "*************************************************************"
   echo "configure does not currently recognize your operating system,"
   echo "therefore you must do a manual configuration of:"
   echo "$host_os"
   echo "Please contact scrappy@hub.org to see about rectifying this, "
   echo "including the above 'checking host system type...' line "
   echo "*************************************************************"
   echo ""
   exit;;
esac

if test "X$need_tas" = "Xyes"
then
	AC_LINK_FILES(backend/port/tas/${tas_file}, backend/port/tas.s)
	TAS=tas.o
	AC_SUBST(TAS)
fi

PORTNAME=${os}
AC_LINK_FILES(backend/port/dynloader/${os}.c, backend/port/dynloader.c)
AC_LINK_FILES(backend/port/dynloader/${os}.h, include/dynloader.h)
AC_LINK_FILES(include/port/${os}.h, include/os.h)
AC_LINK_FILES(makefiles/Makefile.${os}, Makefile.port)

AC_SUBST(PORTNAME)

echo "checking echo setting..."
if echo '\c' | grep -s c >/dev/null 2>&1
then
	ECHO_N="echo -n"
	ECHO_C=""
else
	ECHO_N="echo"
	ECHO_C='\c'
fi

dnl this part selects the template from the one in the
dnl template directory.

AC_MSG_CHECKING(setting template to)
AC_ARG_WITH(template,
    [  --with-template=TEMPLATE
                          use operating system template file 
                              see template directory],
    [  TEMPLATE=$withval ],
    [  host_no_ver=`echo "$host" | sed 's/[[0-9.]]*$//'`
       GUESS=`grep "$host_no_ver" template/.similar | sed 's/.*=//' | tail -1`
       if test "$GUESS"
       then	TEMPLATE="$GUESS"
       else	TEMPLATE=`uname -s | tr A-Z a-z` 
       fi
    ])
AC_MSG_RESULT($TEMPLATE)

export TEMPLATE
if test ! -f "template/$TEMPLATE"; then
	echo ""
	echo "$TEMPLATE does not exist"
	echo ""
	echo "Available Templates (set using --with-template):"
	echo ""
	ls template
	echo ""
	exit
fi

AROPT=`grep '^AROPT:' template/$TEMPLATE | awk -F: '{print $2}'`
SHARED_LIB=`grep '^SHARED_LIB:' template/$TEMPLATE | awk -F: '{print $2}'`
CFLAGS=`grep '^CFLAGS:' template/$TEMPLATE | awk -F: '{print $2}'`
SRCH_INC=`grep '^SRCH_INC:' template/$TEMPLATE | awk -F: '{print $2}'`
SRCH_LIB=`grep '^SRCH_LIB:' template/$TEMPLATE | awk -F: '{print $2}'`
USE_LOCALE=`grep '^USE_LOCALE:' template/$TEMPLATE | awk -F: '{print $2}'`
DLSUFFIX=`grep '^DLSUFFIX:' template/$TEMPLATE | awk -F: '{print $2}'`
DL_LIB=`grep '^DL_LIB:' template/$TEMPLATE | awk -F: '{print $2}'`
YACC=`grep '^YACC:' template/$TEMPLATE | awk -F: '{print $2}'`
YFLAGS=`grep '^YFLAGS:' template/$TEMPLATE | awk -F: '{print $2}'`
CC=`grep '^CC:' template/$TEMPLATE | awk -F: '{print $2}'`
LIBS=`grep '^LIBS:' template/$TEMPLATE | awk -F: '{print $2}'`


AC_ARG_WITH(includes,
    [  --with-includes=DIR     site header files for tk/tcl, etc in DIR],
    [
	case "$withval" in
	"" | y | ye | yes | n | no)
	    AC_MSG_ERROR([*** You must supply an argument to the --with-includes option.])
	  ;;
	esac
	INCLUDE_DIRS="$withval"
    ])

if test "$INCLUDE_DIRS"; then
	for dir in $INCLUDE_DIRS; do
		if test -d "$dir"; then
			PGSQL_CPPFLAGS="$PGSQL_CPPFLAGS -I$dir"
		else
			AC_MSG_WARN([*** Include directory $dir does not exist.])
		fi
	done
fi

AC_ARG_WITH(libs,
    [  --with-libs=DIR         site library directories for tk/tcl, etc in DIR],
    [
	case "$withval" in
	"" | y | ye | yes | n | no)
	    AC_MSG_ERROR([*** You must supply an argument to the --with-libs option.])
	  ;;
	esac
	LIBRARY_DIRS="$withval"
    ])

AC_ARG_WITH(libraries,
    [  --with-libraries=DIR    site library directories for tk/tcl, etc in DIR],
    [
	case "$withval" in
	"" | y | ye | yes | n | no)
	    AC_MSG_ERROR([*** You must supply an argument to the --with-libraries option.])
	  ;;
	esac
	LIBRARY_DIRS="$withval"
    ])

if test "$LIBRARY_DIRS"; then
	for dir in $LIBRARY_DIRS; do
		if test -d "$dir"; then
			PGSQL_LDFLAGS="$PGSQL_LDFLAGS -L$dir"
		else
			AC_MSG_WARN([*** Library directory $dir does not exist.])
		fi
	done
fi

dnl We have read the default value of USE_LOCALE from the template
dnl file.  We have a further option of using
dnl	--enable-locale		to explicitly enable it
dnl It defaults to disabled
AC_MSG_CHECKING(setting USE_LOCALE)
AC_ARG_ENABLE(
   locale,
   [  --enable-locale	  enable locale support ],
   AC_DEFINE(USE_LOCALE) AC_MSG_RESULT(enabled),
   AC_MSG_RESULT(disabled)
)

dnl We exclude cyrillic recode support unless we override it with
dnl	--enable-recode		to explicitly enable it
dnl It defaults to disabled
AC_MSG_CHECKING(setting CYR_RECODE)
AC_ARG_ENABLE(
   recode,
   [  --enable-recode	  enable cyrillic recode support ],
   AC_DEFINE(CYR_RECODE) AC_MSG_RESULT(enabled),
   AC_MSG_RESULT(disabled)
)

AC_MSG_CHECKING(setting MULTIBYTE)
AC_ARG_WITH(mb,
    [  --with-mb=<encoding> enable multi-byte support ], 
    [
	case "$withval" in
	EUC_JP|EHC_CN|EUC_KR|EUC_TW|UNICODE|MULE_INTERNAL|LATIN1|LATIN2|LATIN3|LATIN4|LATIN5)
	    AC_MSG_RESULT("enabled with $withval")
            ;;
	*)
	    AC_MSG_ERROR([*** You must supply an argument to the --with-mb option one of EUC_JP,EHC_CN,EUC_KR,EUC_TW,UNICODE,MULE_INTERNAL,LATIN1-5])
	  ;;
	esac
	MULTIBYTE="$withval"
    ],
    AC_MSG_RESULT("disabled")
)

dnl We use the default value of 5432 for the DEF_PGPORT value.	If
dnl we over-ride it with --with-pgport=port then we bypass this piece
AC_MSG_CHECKING(setting DEF_PGPORT)
AC_ARG_WITH(
   pgport,
   [  --with-pgport=<portnum> change default startup port ],
   AC_DEFINE_UNQUOTED(DEF_PGPORT, "${withval}") AC_MSG_RESULT($with_pgport),
   AC_DEFINE_UNQUOTED(DEF_PGPORT, "5432") AC_MSG_RESULT(5432)
)

dnl We exclude tcl support unless we override it with --with-tcl
AC_MSG_CHECKING(setting USE_TCL)
AC_ARG_WITH(
   tcl,
   [  --with-tcl		  use tcl ],
   USE_TCL=true; AC_MSG_RESULT(enabled),
   USE_TCL=false; AC_MSG_RESULT(disabled)
)

dnl Add tcl/tk candidate directories to CPPFLAGS
if test "$USE_TCL"; then
	header_dirs="/usr/include $INCLUDE_DIRS"
	tcl_dirs="tcl8.0 tcl80 tcl7.6 tcl76"
	tk_dirs="tk8.0 tk4.2"
	for dir in $header_dirs; do
		for tcl_dir in $tcl_dirs; do
			if test -d "$dir/$tcl_dir"; then
				PGSQL_CPPFLAGS="$PGSQL_CPPFLAGS -I$dir/$tcl_dir"
			fi
		done
	done
	for dir in $header_dirs; do
		for tk_dir in $tk_dirs; do
			if test -d "$dir/$tk_dir"; then
			PGSQL_CPPFLAGS="$PGSQL_CPPFLAGS -I$dir/$tk_dir"
			fi
		done
	done
fi
export USE_TCL
USE_X=$USE_TCL

dnl We exclude perl support unless we override it with --with-perl
AC_MSG_CHECKING(setting USE_PERL)
AC_ARG_WITH(
   perl,
   [  --with-perl		  use perl ],
   USE_PERL=true; AC_MSG_RESULT(enabled),
   USE_PERL=false; AC_MSG_RESULT(disabled)
)

#dnl Verify that postgres is already installed
#dnl per instructions for perl interface installation
#if test "$USE_PERL" = "true"
#then
#	if test ! -x "$prefix"/bin/postgres -a ! -x "$ac_default_prefix"/bin/postgres
#	then	AC_MSG_WARN(perl support disabled; postgres not previously installed)
#		USE_PERL=
#	fi
#fi
export USE_PERL

dnl Unless we specify the command line options
dnl	--enable cassert	to explicitly enable it
dnl If you do not explicitly do it, it defaults to disabled
AC_MSG_CHECKING(setting ASSERT CHECKING)
AC_ARG_ENABLE(
   cassert,
   [  --enable-cassert	  enable assertion checks (debugging) ],
   AC_DEFINE(USE_ASSERT_CHECKING) AC_MSG_RESULT(enabled),
   AC_MSG_RESULT(disabled)
)

dnl Check for C support (allow override if needed)
AC_ARG_WITH(CC,
    [  --with-CC=compiler     use specific C compiler],
    [
	case "$withval" in
	"" | y | ye | yes | n | no)
	    AC_MSG_ERROR([*** You must supply an argument to the --with-CC option.])
	  ;;
	esac
	CC="$withval"
    ],
    [   AC_PROG_CC])

if test "$CC" = "gcc"
then
	CC_VERSION=`${CC} --version`
else
	CC_VERSION=""
fi
AC_SUBST(CC_VERSION)

CPPFLAGS="$CPPFLAGS $PGSQL_CPPFLAGS"
export CPPFLAGS
echo "- setting CPPFLAGS=$CPPFLAGS"

LDFLAGS="$LDFLAGS $PGSQL_LDFLAGS"
export LDFLAGS
echo "- setting LDFLAGS=$LDFLAGS"

AC_CONFIG_HEADER(include/config.h)

dnl Checks for programs.
AC_PROG_CPP

AC_SUBST(PORTNAME)
AC_SUBST(LDFLAGS)
AC_SUBST(CPPFLAGS)
AC_SUBST(AROPT)
AC_SUBST(SHARED_LIB)
AC_SUBST(CFLAGS)
AC_SUBST(DLSUFFIX)
AC_SUBST(DL_LIB)
AC_SUBST(USE_TCL)
AC_SUBST(USE_PERL)
AC_SUBST(MULTIBYTE)

dnl Check for C++ support (allow override if needed)
HAVECXX='HAVE_Cplusplus=true'
AC_ARG_WITH(CXX,
    [  --with-CXX=compiler     use specific C++ compiler],
    [
	case "$withval" in
	"" | y | ye | yes)
	    AC_MSG_ERROR([*** You must supply an argument to the --with-CC option.])
	  ;;
	n | no)
	    HAVECXX='HAVE_Cplusplus=false'
	  ;;
	esac
	CXX="$withval"
    ],
    [   AC_PROG_CXX])
AC_SUBST(HAVECXX)

INSTALLPATH="/usr/ucb:$PATH"
AC_PATH_PROGS(INSTALL, ginstall installbsd bsdinst scoinst install, NONE, $INSTALLPATH)
if test $INSTALL = "NONE"
then
	echo "- No Install Script found - aborting."
	exit 0;
fi

INSTLOPTS="-m 444"
INSTL_EXE_OPTS="-m 555"
INSTL_LIB_OPTS="-m 644"
INSTL_SHLIB_OPTS="-m 644"

dnl HPUX wants shared libs to be mode 555.
case "$host_os" in
 hpux*)
	INSTL_SHLIB_OPTS="-m 555" ;;
esac

case "`basename $INSTALL`" in
 install|installbsd|scoinst)
	INSTLOPTS="-c $INSTLOPTS"
	INSTL_EXE_OPTS="-c $INSTL_EXE_OPTS"
	INSTL_LIB_OPTS="-c $INSTL_LIB_OPTS"
	INSTL_SHLIB_OPTS="-c $INSTL_SHLIB_OPTS";;
esac

echo "- Using $INSTALL"
AC_SUBST(INSTALL)
AC_SUBST(INSTLOPTS)
AC_SUBST(INSTL_LIB_OPTS)
AC_SUBST(INSTL_SHLIB_OPTS)
AC_SUBST(INSTL_EXE_OPTS)

dnl Check the option to echo to inhibit newlines.
ECHO_N_OUT=`echo -n "" | wc -c`
ECHO_C_OUT=`echo "\c" | wc -c`
if test "$ECHO_N_OUT" -eq 0; then
	DASH_N='-n'
	BACKSLASH_C=
else
	if test "ECHO_C_OUT" -eq 0; then
		DASH_N=
		BACKSLASH_C='\\\\c'
	else
		AC_MSG_ERROR("echo behaviour undetermined")
	fi
fi
AC_SUBST(DASH_N)
AC_SUBST(BACKSLASH_C)

AC_PROG_LEX
AC_PROG_LN_S
AC_PROG_MAKE_SET
AC_PROG_RANLIB
AC_PATH_PROG(find, find)
AC_PATH_PROG(tar, tar)
AC_PATH_PROG(split, split)
AC_PATH_PROG(etags, etags)
AC_PATH_PROG(xargs, xargs)
AC_PATH_PROG(ipcs, ipcs)
AC_PATH_PROG(ipcrm, ipcrm)
AC_PATH_PROGS(TR, trbsd tr, NOT_FOUND)

dnl Check tr flags to convert from lower to upper case
TRSTRINGS="`echo ABCdef | $TR '[[a-z]]' '[[A-Z]]' 2>/dev/null | grep ABCDEF`"
TRCLASS="`echo ABCdef | $TR '[[:lower:]]' '[[:upper:]]' 2>/dev/null | grep ABCDEF`"

if test "$TRSTRINGS" = "ABCDEF"; then
	TRARGS="'[[a-z]]' '[[A-Z]]'"
elif test "$TRCLASS" = "ABCDEF"; then
	TRARGS="'[[:lower:]]' '[[:upper:]]'"
else
	AC_MSG_ERROR("Can\'t find method to convert from upper to lower case with tr")
fi
AC_SUBST(TRARGS)

dnl Changes to look for YACC.  We have three choices (in order of pref.)
dnl (1) We specify in YACC and YFLAGS what we want
dnl (2) We have bison and we use bison -y
dnl (3) We have yacc and use it

AC_SUBST(YACC)
AC_SUBST(YFLAGS)
AC_PATH_PROG(yacc, yacc)
AC_PATH_PROG(bison, bison)
if test -f "$YACC"
then
	echo "- Using $YACC $YFLAGS"
elif test -f "$bison"
then
	echo "- Using $bison -y $YFLAGS"
	YACC="$bison"
	YFLAGS="-y $YFLAGS"
	export YACC YFLAGS
else
	echo "- Using $yacc $YFLAGS"
	YACC="$yacc"
	export YACC
fi

AC_CHECK_LIB(sfio,     main)
for curses in ncurses curses ; do
	AC_CHECK_LIB(${curses}, main,
		[LIBS="-l${curses} $LIBS"; break])
done
AC_CHECK_LIB(termcap,  main)
AC_CHECK_LIB(history,  main)
AC_CHECK_LIB(readline, main)
AC_CHECK_LIB(readline, write_history, AC_DEFINE(HAVE_HISTORY))
if test "$PORTNAME" != "aix" -a "$PORTNAME" != "alpha"
then
	AC_CHECK_LIB(bsd,      main)
fi
AC_CHECK_LIB(m,        main)
AC_CHECK_LIB(dl,       main)
AC_CHECK_LIB(socket,   main)
AC_CHECK_LIB(nsl,      main)
AC_CHECK_LIB(ipc,      main)
AC_CHECK_LIB(IPC,      main)
AC_CHECK_LIB(lc,       main)
AC_CHECK_LIB(dld,      main)
AC_CHECK_LIB(ln,       main)
AC_CHECK_LIB(ld,       main)
AC_CHECK_LIB(compat,   main)
AC_CHECK_LIB(BSD,      main)
AC_CHECK_LIB(crypt,    main)
AC_CHECK_LIB(gen,      main)
AC_CHECK_LIB(PW,       main)

dnl Checks for header files.
AC_HEADER_STDC
AC_HEADER_SYS_WAIT
AC_CHECK_HEADERS(limits.h unistd.h termios.h values.h sys/select.h)
AC_CHECK_HEADERS(sys/resource.h netdb.h arpa/inet.h getopt.h)
AC_CHECK_HEADERS(readline.h history.h dld.h crypt.h endian.h float.h)
AC_CHECK_HEADERS(readline/readline.h readline/history.h ieeefp.h fp_class.h)
AC_CHECK_HEADERS(netinet/in.h string.h strings.h)

dnl Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_TYPE_UID_T
AC_C_INLINE
AC_TYPE_MODE_T
AC_TYPE_OFF_T
AC_TYPE_SIZE_T
AC_HEADER_TIME
AC_STRUCT_TM

dnl Check for any "odd" conditions
AC_MSG_CHECKING(for int timezone)
AC_TRY_LINK([#include <time.h>],
	    [int res = timezone / 60; ],
	    [AC_DEFINE(HAVE_INT_TIMEZONE) AC_MSG_RESULT(yes)],
	    AC_MSG_RESULT(no))

AC_MSG_CHECKING(for gettimeofday args)
AC_TRY_LINK([#include <sys/time.h>],
	    [struct timeval *tp; struct timezone *tzp; gettimeofday(tp,tzp); ],
	    [AC_DEFINE(HAVE_GETTIMEOFDAY_2_ARGS) AC_MSG_RESULT(2 args)],
	    AC_MSG_RESULT(no))

AC_MSG_CHECKING(for union semun)
AC_TRY_LINK([#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/sem.h>],
	    [union semun semun;],
	    [AC_DEFINE(HAVE_UNION_SEMUN) AC_MSG_RESULT(yes)],
	    AC_MSG_RESULT(no))

AC_MSG_CHECKING(for good DBL_MIN)
AC_TRY_RUN([#include <stdlib.h>
#include <math.h>
#ifdef HAVE_FLOAT_H
# include <float.h>
#endif
main() { double d = DBL_MIN; if (d != DBL_MIN) exit(-1); else exit(0); }],
	AC_MSG_RESULT(yes),
	[AC_MSG_RESULT(no) AC_DEFINE(HAVE_DBL_MIN_PROBLEM)])

dnl Checks for library functions.
AC_PROG_GCC_TRADITIONAL
AC_FUNC_MEMCMP
AC_TYPE_SIGNAL
AC_FUNC_VPRINTF
AC_CHECK_FUNCS(tzset memmove sigsetjmp kill sysconf fpclass)
AC_CHECK_FUNCS(fp_class fp_class_d class)
AC_CHECK_FUNCS(sigprocmask waitpid setsid fcvt)
AC_CHECK_FUNC(snprintf,
	      AC_DEFINE(HAVE_SNPRINTF),
	      ISINF='snprintf.o')
AC_SUBST(SNPRINTF)
AC_CHECK_FUNC(isinf,
	      AC_DEFINE(HAVE_ISINF),
	      ISINF='isinf.o')
AC_SUBST(ISINF)
AC_CHECK_FUNC(getrusage,
	      AC_DEFINE(HAVE_GETRUSAGE),
	      GETRUSAGE='getrusage.o')
AC_SUBST(GETRUSAGE)
AC_CHECK_FUNC(srandom,
	      AC_DEFINE(HAVE_SRANDOM),
	      SRANDOM='srandom.o')
AC_SUBST(SRANDOM)
AC_CHECK_FUNC(gethostname,
	      AC_DEFINE(HAVE_GETHOSTNAME),
	      GETHOSTNAME='gethostname.o')
AC_SUBST(GETHOSTNAME)
AC_CHECK_FUNC(random,
	      AC_DEFINE(HAVE_RANDOM),
	      MISSING_RANDOM='random.o')
AC_SUBST(MISSING_RANDOM)
AC_CHECK_FUNC(inet_aton,
	      AC_DEFINE(HAVE_INET_ATON),
	      INET_ATON='inet_aton.o')
AC_SUBST(INET_ATON)
AC_CHECK_FUNC(strerror,
	      AC_DEFINE(HAVE_STRERROR),
	      [STRERROR='strerror.o' STRERROR2='../../backend/port/strerror.o'])
AC_SUBST(STRERROR)
AC_SUBST(STRERROR2)
AC_CHECK_FUNC(strdup,
	      AC_DEFINE(HAVE_STRDUP),
	      STRDUP='../../utils/strdup.o')
AC_SUBST(STRDUP)
AC_CHECK_FUNC(strtol,
	      AC_DEFINE(HAVE_STRTOL),
	      STRTOL='strtol.o')
AC_SUBST(STRTOL)
AC_CHECK_FUNC(strtoul,
	      AC_DEFINE(HAVE_STRTOUL),
	      STRTOL='strtoul.o')
AC_SUBST(STRTOUL)
AC_CHECK_FUNC(strcasecmp,
	      AC_DEFINE(HAVE_STRCASECMP),
	      STRCASECMP='strcasecmp.o')
AC_SUBST(STRCASECMP)
AC_CHECK_FUNC(cbrt,
	      AC_DEFINE(HAVE_CBRT),
	      AC_CHECK_LIB(m, cbrt, AC_DEFINE(HAVE_CBRT)))
AC_CHECK_FUNC(rint,
	      AC_DEFINE(HAVE_RINT),
[
# On HPUX 9, rint() is not in regular libm.a but in /lib/pa1.1/libm.a
SPECIALMATHLIB=""
if [[ -r /lib/pa1.1/libm.a ]] ; then
    SPECIALMATHLIB="-L /lib/pa1.1 -lm"
fi
	      AC_CHECK_LIB(m, rint, AC_DEFINE(HAVE_RINT), , $SPECIALMATHLIB)
])

dnl Check for X libraries

if test "$USE_X" = true; then

	ice_save_LIBS="$LIBS"
	ice_save_CFLAGS="$CFLAGS"
	ice_save_CPPFLAGS="$CPPFLAGS"
	ice_save_LDFLAGS="$LDFLAGS"

	AC_PATH_XTRA

	LIBS="$LIBS $X_EXTRA_LIBS"
	CFLAGS="$CFLAGS $X_CFLAGS"
	CPPFLAGS="$CPPFLAGS $X_CFLAGS"
	LDFLAGS="$LDFLAGS $X_LIBS"

	dnl Check for X library

	X11_LIBS=""
	AC_CHECK_LIB(X11, XOpenDisplay, X11_LIBS="-lX11",,${X_PRE_LIBS})
	if test "$X11_LIBS" = ""; then
		dnl Not having X may be fatal.	Let the user fix this.
		AC_MSG_WARN([The X11 library '-lX11' could not be found.
			    Please use the configure options '--x-includes=DIR'
			    and '--x-libraries=DIR' to specify the X location.
			    See the file 'config.log' for further diagnostics.])
	fi
	AC_SUBST(X_LIBS)
	AC_SUBST(X11_LIBS)
	AC_SUBST(X_PRE_LIBS)

	LIBS="$ice_save_LIBS"
	CFLAGS="$ice_save_CFLAGS"
	CPPFLAGS="$ice_save_CPPFLAGS"
	LDFLAGS="$ice_save_LDFLAGS"
fi

dnl Check for location of Tcl support
dnl Disable Tcl support if not found

dnl Check for tcl.h
if test "$USE_TCL" = "true"
then
	TCL_INCDIR=no
	AC_CHECK_HEADER(tcl.h, TCL_INCDIR=yes)
	if test "$TCL_INCDIR" = "no"; then
		AC_MSG_WARN(tcl support disabled; tcl.h missing)
		USE_TCL=
	fi
fi

dnl Check for Tcl archive
if test "$USE_TCL" = "true"; then
	TCL_LIB=
	tcl_libs="tcl8.0 tcl80 tcl7.6 tcl76 tcl"
	for tcl_lib in $tcl_libs; do
		if test -z "$TCL_LIB"; then
			AC_CHECK_LIB($tcl_lib, main, TCL_LIB=$tcl_lib)
		fi
	done
	if test -z "$TCL_LIB"; then
		AC_MSG_WARN(tcl support disabled; Tcl library missing)
		USE_TCL=
	else
		TCL_LIB=-l$TCL_LIB
	fi
	AC_SUBST(TCL_LIB)
fi

dnl Check for location of Tk support (only if Tcl used)
dnl Disable Tcl support if Tk not found

dnl Check for tk.h
if test "$USE_TCL" = "true"
then
	ice_save_LIBS="$LIBS"
	ice_save_CFLAGS="$CFLAGS"
	ice_save_CPPFLAGS="$CPPFLAGS"
	ice_save_LDFLAGS="$LDFLAGS"

	CPPFLAGS="$CPPFLAGS $X_CFLAGS"

	TK_INCDIR=no
	AC_CHECK_HEADER(tk.h, TK_INCDIR=yes)
	if test "$TK_INCDIR" = "no"; then
		AC_MSG_WARN(tcl support disabled; tk.h missing)
		USE_TCL=
	fi

	LIBS="$ice_save_LIBS"
	CFLAGS="$ice_save_CFLAGS"
	CPPFLAGS="$ice_save_CPPFLAGS"
	LDFLAGS="$ice_save_LDFLAGS"
fi

dnl Check for Tk archive
if test "$USE_TCL" = "true"
then
	ice_save_LIBS="$LIBS"
	ice_save_CFLAGS="$CFLAGS"
	ice_save_CPPFLAGS="$CPPFLAGS"
	ice_save_LDFLAGS="$LDFLAGS"

	LIBS="$TCL_LIB $X_PRE_LIBS $X11_LIBS $X_EXTRA_LIBS $LIBS"
	CFLAGS="$CFLAGS $X_CFLAGS"
	CPPFLAGS="$CPPFLAGS $X_CFLAGS"
	LDFLAGS="$LDFLAGS $X_LIBS"

	TK_LIB=
	tk_libs="tk8.0 tk80 tk4.2 tk42 tk"
	for tk_lib in $tk_libs; do
		if test -z "$TK_LIB"; then
			AC_CHECK_LIB($tk_lib, main, TK_LIB=$tk_lib)
		fi
	done
	if test -z "$TK_LIB"; then
		AC_MSG_WARN(tk support disabled; Tk library missing)
		USE_TCL=
	else
		TK_LIB=-l$TK_LIB
	fi

	AC_SUBST(TK_LIB)

	LIBS="$ice_save_LIBS"
	CFLAGS="$ice_save_CFLAGS"
	CPPFLAGS="$ice_save_CPPFLAGS"
	LDFLAGS="$ice_save_LDFLAGS"
fi

AC_OUTPUT(GNUmakefile Makefile.global backend/port/Makefile bin/pg_version/Makefile bin/psql/Makefile bin/pg_dump/Makefile backend/utils/Gen_fmgrtab.sh interfaces/libpq/Makefile interfaces/libpgtcl/Makefile interfaces/ecpg/lib/Makefile include/version.h)
