configure.in

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

AC_PREREQ(2.13)
AC_CONFIG_AUX_DIR(config)

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_i386 need_tas=yes tas_file=solaris_i386.s ;;
	esac ;;
   sunos*) os=sunos4 need_tas=no ;;
     beos) os=beos need_tas=no ;;
     aux*) os=aux need_tas=no ;;
   linux*) os=linux need_tas=no ;;
    bsdi*) os=bsdi need_tas=no ;;
 freebsd1*|freebsd2*) os=freebsd need_tas=no ;;
 freebsd*) os=freebsd need_tas=no elf=yes ;;
  netbsd*) os=netbsd need_tas=no ;;
  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 "$host_vendor" in
	       univel) os=univel need_tas=no ;;
		    *) os=unknown need_tas=no ;;
       esac ;;
   sysv4*) os=svr4 need_tas=no ;;
   sysv5uw*) os=unixware need_tas=no ;;
   unixware*) os=unixware need_tas=no ;;
    qnx*) os=qnx4 need_tas=no ;;
*) echo ""
   echo "*************************************************************"
   echo "configure does not currently recognize your operating system,"
   echo "therefore you must do a manual configuration of:"
   echo "$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

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

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

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 ones in the 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 ],
    [

# lowercase $host
host="`echo $host | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz'`"

# First, try for a template exactly matching $host
if test -f "src/template/$host"
then TEMPLATE="$host"
else
    # Scan template/.similar for a rule that tells us which template to use.
    # The format of each line of the file is
    #           hostnamepattern=templatefilename
    # where the hostnamepattern is evaluated per the rules of expr(1) ---
    # namely, it is a standard regular expression with an implicit ^ at the
    # start.  If multiple lines match, we will end up using the last match.
    #
    # The tempfile hackery is needed because some shells will run the loop
    # inside a subshell, whereupon shell variables set therein aren't seen
    # outside the loop :-(
    TMPFILE="guesses.$$"
    cat /dev/null > $TMPFILE
    while read LINE
    do
	SIMHOST=`expr "$LINE" : '\(.*\)='`
	MATCH=`expr "$host" : "$SIMHOST"`
	if test "$MATCH" != 0
	then
	    echo "$LINE" | sed 's/^.*=//' > $TMPFILE
	fi
    done <src/template/.similar
    GUESS=`cat $TMPFILE`
    rm -f $TMPFILE
    if test "$GUESS"
    then TEMPLATE="$GUESS"
    else
	# Last chance ... maybe uname -s will match an entry.
	TEMPLATE=`uname -s | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz'`
    fi
fi
    ])
AC_MSG_RESULT($TEMPLATE)

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

dnl Read the selected template file.
dnl For reasons of backwards compatibility, lines of the form
dnl     IDENTIFIER: something
dnl should be treated as variable assignments.  However, we also want to
dnl allow other shell commands in the template file (in case the file
dnl needs to make conditional tests, etc).  So, generate a temp file with
dnl the IDENTIFIER: lines translated, then source it.

[
rm -f conftest.sh
sed 's/^\([A-Za-z_]*\):\(.*\)$/\1="\2"/' "src/template/$TEMPLATE" >conftest.sh
. ./conftest.sh
rm -f conftest.sh
]


AC_ARG_WITH(includes,
    [  --with-includes=DIRS    look for header files for tcl/tk, etc in DIRS],
    [
	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"
    ])

dnl INCLUDE_DIRS comes from command line, SRCH_INC from template file.
dnl Each can name one or more directories.
if test "$INCLUDE_DIRS" -o "$SRCH_INC"; then
	for dir in $INCLUDE_DIRS $SRCH_INC; do
		if test -d "$dir"; then
			PGSQL_INCLUDES="$PGSQL_INCLUDES -I$dir"
		else
			AC_MSG_WARN([*** Include directory $dir does not exist.])
		fi
	done
fi

AC_ARG_WITH(libraries,
    [  --with-libraries=DIRS   look for additional libraries in DIRS],
    [
	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"
    ])

AC_ARG_WITH(libs,
    [  --with-libs=DIRS        alternate spelling of --with-libraries],
    [
	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"
    ])

dnl LIBRARY_DIRS comes from command line, SRCH_LIB from template file.
dnl Each can name one or more directories.
if test "$LIBRARY_DIRS" -o "$SRCH_LIB"; then
	for dir in $LIBRARY_DIRS $SRCH_LIB; do
		if test -d "$dir"; then
			PGSQL_LDFLAGS="$PGSQL_LDFLAGS -L$dir"
		else
			AC_MSG_WARN([*** Library directory $dir does not exist.])
		fi
	done
fi


AC_MSG_CHECKING(whether to support 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(whether to support cyrillic recode)
AC_ARG_ENABLE(
   recode,
   [  --enable-recode         enable cyrillic recode support ],
   [AC_DEFINE(CYR_RECODE) AC_MSG_RESULT(enabled)],
   AC_MSG_RESULT(disabled)
)

dnl Multibyte support

AC_MSG_CHECKING(whether to support multibyte)
AC_ARG_ENABLE(multibyte,
    [  --enable-multibyte      enable multibyte character support ], 
    [
        MULTIBYTE=SQL_ASCII
        if test "$enableval" != "yes"; then
                case "$enableval" in
                        SQL_ASCII|EUC_JP|EUC_CN|EUC_KR|EUC_TW|UNICODE|MULE_INTERNAL|LATIN1|LATIN2|LATIN3|LATIN4|LATIN5|KOI8|WIN|ALT)
                        # ok
                        ;;
                *)
                        AC_MSG_ERROR(
[Argument to --enable-multibyte must be one of:
  SQL_ASCII, EUC_JP, EUC_CN, EUC_KR, EUC_TW,
  UNICODE, MULE_INTERNAL,
  LATIN1, LATIN2, LATIN3, LATIN4, LATIN5,
  KOI8, WIN, ALT
Or do not specify an argument to the option to use the default.])
                esac
                MULTIBYTE=$enableval
        fi
        AC_DEFINE(MULTIBYTE)
        AC_MSG_RESULT(enabled)
    ],
    AC_MSG_RESULT("disabled")
)

dnl Old option variant
if test "${with_mb}"; then                                   
  AC_MSG_ERROR([--with-mb is not supported anymore. Use --enable-multibyte instead.])
fi                                                                                


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 postmaster port ],
   [default_port="$withval"],
   [default_port=5432]
)
dnl Need to do this twice because backend wants an integer and frontend a string
AC_DEFINE_UNQUOTED(DEF_PGPORT, ${default_port})
AC_DEFINE_UNQUOTED(DEF_PGPORT_STR, "${default_port}")
AC_MSG_RESULT(${default_port})


dnl DEF_MAXBACKENDS can be set by --with-maxbackends.  Default value is 32.
AC_MSG_CHECKING(setting DEF_MAXBACKENDS)
AC_ARG_WITH(
   maxbackends,
   [  --with-maxbackends=N    set default maximum number of server processes ],
   AC_DEFINE_UNQUOTED(DEF_MAXBACKENDS, ${withval}) AC_MSG_RESULT($with_maxbackends),
   AC_DEFINE_UNQUOTED(DEF_MAXBACKENDS, 32) AC_MSG_RESULT(32)
)

dnl We exclude tcl support unless user says --with-tcl
AC_MSG_CHECKING(setting USE_TCL)
AC_ARG_WITH(
   tcl,
   [  --with-tcl              build Tcl interfaces and pgtclsh ],
   [
	case "$withval" in
	y | ye | yes)		USE_TCL=true; USE_TK=true; AC_MSG_RESULT(enabled) ;;
	*)			USE_TCL=; USE_TK=; AC_MSG_RESULT(disabled) ;;
	esac
   ],
   [ USE_TCL=; USE_TK=; AC_MSG_RESULT(disabled) ]
)

export USE_TCL
export USE_TK

dnl We see if the path to the TCL/TK configuration scripts is specified.
dnl This will override the use of tclsh to find the paths to search.

AC_ARG_WITH(tclconfig,
    [  --with-tclconfig=DIR    tclConfig.sh and tkConfig.sh are in DIR],
    [
	case "$withval" in
	"" | y | ye | yes | n | no)
	    AC_MSG_ERROR([*** You must supply an argument to the --with-tclconfig option.])
	  ;;
	esac
	TCL_DIRS="$withval"
    ]
)

dnl We see if the path to the TK configuration scripts is specified.
dnl This will override the use of tclsh to find the paths to search.

AC_ARG_WITH(tkconfig,
    [  --with-tkconfig=DIR     tkConfig.sh is in DIR],
    [
	case "$withval" in
	"" | y | ye | yes | n | no)
	    AC_MSG_ERROR([*** You must supply an argument to the --with-tkconfig option.])
	  ;;
	esac
	TK_DIRS="$withval"
    ]
)

dnl We exclude perl support unless we override it with --with-perl
AC_MSG_CHECKING(setting USE_PERL)
AC_ARG_WITH(
   perl,
   [  --with-perl             build Perl interface and plperl ],
   [
	case "$withval" in
	y | ye | yes)	USE_PERL=true; AC_MSG_RESULT(enabled) ;;
	*)		USE_PERL=false; AC_MSG_RESULT(disabled) ;;
	esac
   ],
   [ USE_PERL=false; AC_MSG_RESULT(disabled) ]
)

dnl We include odbc support unless we disable it with --with-odbc=false
AC_MSG_CHECKING(setting USE_ODBC)
AC_ARG_WITH(
   odbc,
   [  --with-odbc             build ODBC driver package ],
   [
	case "$withval" in
	y | ye | yes)		USE_ODBC=true; AC_MSG_RESULT(enabled) ;;
	*)			USE_ODBC=false; AC_MSG_RESULT(disabled) ;;
	esac
   ],
   [ USE_ODBC=false; AC_MSG_RESULT(disabled) ]
)
export USE_ODBC


dnl Allow for overriding the default location of the odbcinst.ini
dnl file which is normally ${prefix}/share or ${prefix} if this is
dnl being compiled inside the postgres distribution.
dnl Link in the port and template directories
dnl to help build a "standalone ODBC" tar file
if test "X$USE_ODBC" = "Xtrue"
then
   AC_LINK_FILES(src/include/port, src/interfaces/odbc/port)
   AC_LINK_FILES(src/makefiles, src/interfaces/odbc/makefiles)
   AC_LINK_FILES(src/template, src/interfaces/odbc/template)
   AC_LINK_FILES(src/include/config.h, src/interfaces/odbc/config.h)

   AC_MSG_CHECKING(setting ODBCINST)
   AC_ARG_WITH(
      odbcinst,
      [  --with-odbcinst=DIR     change default directory for odbcinst.ini],
      AC_DEFINE_UNQUOTED(ODBCINST, ${with_odbcinst}) AC_MSG_RESULT($with_odbcinst),
      AC_DEFINE_UNQUOTED(ODBCINST, ${ODBCINSTDIR}) AC_MSG_RESULT(${ODBCINSTDIR})
   )
fi
if test "X$with_odbcinst" != "X"
then
    ODBCINSTDIR=$with_odbcinst
fi
AC_SUBST(ODBCINSTDIR)

#check for unixODBC

use_unixODBC=no
AC_ARG_WITH(unixODBC,
[  --with-unixODBC[=DIR]   Use unixODBC located in DIR],
[use_unixODBC=yes;unixODBC="$withval"],use_unixODBC=no)

if test "x$use_unixODBC" = "xyes"
then

# default to /usr if not specified
if test "x$unixODBC" = "x"
then
    unixODBC="/usr";
fi

AC_ARG_WITH(unixODBC-includes,
    [  --with-unixODBC-includes=DIR Find unixODBC headers in DIR],
    unixODBC_includes="$withval",unixODBC_includes="$unixODBC/include")

    AC_ARG_WITH(unixODBC-libs,
    [  --with-unixODBC-libs=DIR Find unixODBC libraries in DIR],
    unixODBC_libs="$withval",unixODBC_libs="$unixODBC/lib")

    CPPFLAGS="$CPPFLAGS -I$unixODBC_includes"
    AC_CHECK_HEADERS(sql.h sqlext.h odbcinst.h,
        unixODBC_ok=yes;odbc_headers="$odbc_headers $ac_hdr",unixODBC_ok=no; break)

if test "x$unixODBC_ok" != "xyes"
then
    AC_MSG_ERROR([Unable to find the unixODBC headers in $1])
fi

save_LIBS="$LIBS"
LIBS="-L$unixODBC_libs $LIBS"

AC_CHECK_LIB(odbcinst,SQLGetPrivateProfileString,
[AC_DEFINE(HAVE_SQLGETPRIVATEPROFILESTRING)
LIBS="$LIBS -lodbcinst"],
[LIBS="$save_LIBS"])
fi

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 (for debugging) ],
   AC_DEFINE(USE_ASSERT_CHECKING) AC_MSG_RESULT(enabled),
   AC_MSG_RESULT(disabled)
)

dnl Check for C support (allow override if needed)
dnl Note: actually, setting CC environment variable works just as well.
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"
    ])

dnl Find a compiler if CC is not already set.
AC_PROG_CC
dnl Find CPP, then check traditional.
dnl Caution: these macros must be called in this order...
AC_PROG_CPP
AC_PROG_GCC_TRADITIONAL

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

CPPFLAGS="$CPPFLAGS $PGSQL_INCLUDES"
echo "- setting CPPFLAGS=$CPPFLAGS"

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

dnl --enable-debug adds -g to compiler flags
dnl --disable-debug will forcefully remove it
AC_MSG_CHECKING(setting debug compiler flag)
AC_ARG_ENABLE(
    debug,
    [  --enable-debug          build with debugging symbols (-g) ],
    [
        case "$enableval" in
	y | ye | yes)
            CFLAGS="$CFLAGS -g"
            AC_MSG_RESULT(enabled)
            ;;
        *)
            CFLAGS=`echo "$CFLAGS" | sed -e 's/ -g/ /g' | sed -e 's/^-g//'`
            AC_MSG_RESULT(disabled)
            ;;
        esac            
   ],
   AC_MSG_RESULT(using default)
)

# Assume system is ELF if it predefines __ELF__ as 1,
# otherwise believe "elf" setting from check of host_os above.
AC_EGREP_CPP(yes,
[#if __ELF__
  yes
#endif
],
	ELF_SYS=true,
[if test "X$elf" = "Xyes"
then
	ELF_SYS=true
else
	ELF_SYS=
fi
])

AC_SUBST(ELF_SYS)
AC_SUBST(PORTNAME)
AC_SUBST(CPU)
AC_SUBST(SRCDIR)
AC_SUBST(LDFLAGS)
AC_SUBST(CPPFLAGS)
AC_SUBST(PGSQL_INCLUDES)
AC_SUBST(AROPT)
AC_SUBST(SHARED_LIB)
AC_SUBST(CFLAGS)
AC_SUBST(DLSUFFIX)
AC_SUBST(DL_LIB)
AC_SUBST(USE_TCL)
AC_SUBST(USE_TK)
AC_SUBST(WISH)
AC_SUBST(USE_PERL)
AC_SUBST(USE_ODBC)
AC_SUBST(MULTIBYTE)

dnl Check for C++ support (allow override if needed)
dnl XXX: probably should default to HAVECXX='false'
HAVECXX='true'
AC_ARG_WITH(CXX,
    [  --with-CXX=compiler     use specific C++ compiler
  --without-CXX           prevent building C++ code ],
    [
	case "$withval" in
	"" | y | ye | yes)
	    HAVECXX='true'
	    # allow configure to choose C++ compiler
	  ;;
	n | no)
	    HAVECXX='false'
	  ;;
	*)
	    HAVECXX='true'
	    CXX="$withval"
	  ;;
	esac
    ])
AC_SUBST(HAVECXX)

if test "$HAVECXX" = 'true' ; then
    dnl Even if CXX value was given to us, need to run AC_PROG_CXX ...
    AC_PROG_CXX
    AC_LANG_CPLUSPLUS

    dnl check whether "#include <string>" works on this C++ compiler
    AC_MSG_CHECKING([for include <string> in C++])
    AC_TRY_COMPILE([#include <stdio.h>
#include <stdlib.h>
#include <string>
], [],
    [AC_DEFINE(HAVE_CXX_STRING_HEADER) AC_MSG_RESULT(yes)],
    [AC_MSG_RESULT(no)

    dnl If we found a <string> header then it's probably safe to assume
    dnl class string exists.  But if not, check to make sure that <string.h>
    dnl defines class string; libpq++ can't build without class string.
    AC_MSG_CHECKING([for class string in C++])
    AC_TRY_COMPILE([#include <stdio.h>
#include <stdlib.h>
#include <string.h>
], [string foo = "test"],
    [AC_MSG_RESULT(yes)],
    [AC_MSG_RESULT(no)
     AC_MSG_WARN([
***
Disabling build of libpq++ because we cannot find class string in the
system's C++ header files.
***])
     HAVECXX='false'
])
])
fi

if test "$HAVECXX" = 'true' ; then
    dnl check whether "using namespace std" works on this C++ compiler.
    dnl NOTE: on at least some compilers, it will not work until you've
    dnl included a header that mentions namespace std.  Thus, include
    dnl the usual suspects before trying it.
    AC_MSG_CHECKING([for namespace std in C++])
    AC_TRY_COMPILE([#include <stdio.h>
#include <stdlib.h>
#ifdef HAVE_CXX_STRING_HEADER
#include <string>
#endif
using namespace std;
], [],
    [AC_DEFINE(HAVE_NAMESPACE_STD) AC_MSG_RESULT(yes)],
    [AC_MSG_RESULT(no)])
fi

dnl make sure we revert to C compiler, not C++, for subsequent tests
AC_LANG_C

dnl Figure out how to invoke "install" and what install options to use.

AC_PROG_INSTALL

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

AC_SUBST(INSTALL)
AC_SUBST(INSTLOPTS)
AC_SUBST(INSTL_LIB_OPTS)
AC_SUBST(INSTL_SHLIB_OPTS)
AC_SUBST(INSTL_EXE_OPTS)

AC_PROG_AWK

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
if test "$LEX" = "flex"; then
        $LEX --version 2> /dev/null | grep -s '2\.5\.3' > /dev/null 2>&1
        if test $? -eq 0 ; then
                AC_MSG_WARN([
***
You have flex version 2.5.3, which is broken. Get version 2.5.4 or
a different lex.
(If you are using the official distribution of PostgreSQL then you
do not need to worry about this because the lexer files are
pre-generated. However, other software using flex is likely to be
broken as well.)
***])
        fi
fi
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_PROGS(GZCAT, gzcat zcat, gzcat)
AC_CHECK_PROGS(PERL, perl,)
AC_PROG_YACC
AC_SUBST(YFLAGS)


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(readline, main)
AC_CHECK_LIB(readline, using_history, AC_DEFINE(HAVE_HISTORY_IN_READLINE),
    AC_CHECK_LIB(history,  main) )

if test "$PORTNAME" != "aix" -a "$PORTNAME" != "alpha"
then
	AC_CHECK_LIB(bsd,      main)
fi
AC_CHECK_LIB(util,     main)
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(arpa/inet.h)
AC_CHECK_HEADERS(crypt.h)
AC_CHECK_HEADERS(dld.h)
AC_CHECK_HEADERS(endian.h)
AC_CHECK_HEADERS(float.h)
AC_CHECK_HEADERS(fp_class.h)
AC_CHECK_HEADERS(getopt.h)
AC_CHECK_HEADERS(history.h)
AC_CHECK_HEADERS(ieeefp.h)
AC_CHECK_HEADERS(limits.h)
AC_CHECK_HEADERS(netdb.h)
AC_CHECK_HEADERS(netinet/in.h)
AC_CHECK_HEADERS(readline.h)
AC_CHECK_HEADERS(readline/history.h)
AC_CHECK_HEADERS(readline/readline.h)
AC_CHECK_HEADERS(sys/select.h)
AC_CHECK_HEADERS(termios.h)
AC_CHECK_HEADERS(unistd.h)
AC_CHECK_HEADERS(values.h)
AC_CHECK_HEADERS(sys/exec.h sys/pstat.h machine/vmparam.h)
dnl ODBC headers...
AC_CHECK_HEADERS(sys/param.h pwd.h)
dnl

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

AC_MSG_CHECKING(for signed types)
AC_TRY_COMPILE([],
[signed char c; signed short s; signed int i;],
[AC_MSG_RESULT(yes)],
[AC_DEFINE(signed, ) AC_MSG_RESULT(no)])

AC_MSG_CHECKING(for volatile)
AC_TRY_COMPILE([],
[extern volatile int i;],
[AC_MSG_RESULT(yes)],
[AC_DEFINE(volatile, ) AC_MSG_RESULT(no)])

AC_MSG_CHECKING(for type of last arg to accept)
AC_TRY_COMPILE([#include <stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>
],
[int a = accept(1, (struct sockaddr *) 0, (size_t *) 0);],
[AC_DEFINE(SOCKET_SIZE_TYPE, size_t) AC_MSG_RESULT(size_t)],
[AC_DEFINE(SOCKET_SIZE_TYPE, int) AC_MSG_RESULT(int)])

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 fcntl(F_SETLK))
AC_TRY_LINK([#include <fcntl.h>],
	    [struct flock lck;
	     lck.l_whence = SEEK_SET; lck.l_start = lck.l_len = 0;
	     lck.l_type = F_WRLCK;
	     fcntl(0, F_SETLK, &lck);],
	    [AC_DEFINE(HAVE_FCNTL_SETLK) AC_MSG_RESULT(yes)],
	    AC_MSG_RESULT(no))

dnl Checks for library functions.
AC_FUNC_MEMCMP
AC_TYPE_SIGNAL
AC_FUNC_VPRINTF
AC_CHECK_FUNCS(memmove sysconf)
AC_CHECK_FUNCS(sigprocmask waitpid setsid fcvt)
AC_CHECK_FUNCS(setproctitle pstat)

AC_MSG_CHECKING(for PS_STRINGS)
AC_TRY_LINK(
[#ifdef HAVE_MACHINE_VMPARAM_H
# include <machine/vmparam.h>
#endif
#ifdef HAVE_SYS_EXEC_H
# include <sys/exec.h>
#endif],
[PS_STRINGS->ps_nargvstr = 1;
PS_STRINGS->ps_argvstr = "foo";],
[AC_MSG_RESULT(yes) AC_DEFINE(HAVE_PS_STRINGS)],
AC_MSG_RESULT(no))

AC_CHECK_FUNCS(fpclass fp_class fp_class_d class)
dnl We use our snprintf.c emulation if either snprintf() or vsnprintf()
dnl is missing.  Yes, there are machines that have only one.
dnl We may also decide to use snprintf.c if snprintf() is present but does
dnl not have working "long long int" support -- see below.
SNPRINTF=''
AC_CHECK_FUNC(snprintf,
	      AC_DEFINE(HAVE_SNPRINTF),
	      SNPRINTF='snprintf.o')
AC_CHECK_FUNC(vsnprintf,
	      AC_DEFINE(HAVE_VSNPRINTF),
	      SNPRINTF='snprintf.o')
AC_SUBST(SNPRINTF)
dnl Check whether <stdio.h> declares snprintf() and vsnprintf(); if not,
dnl include/c.h will provide declarations.  Note this is a separate test
dnl from whether the functions exist in the C library --- there are systems
dnl that have the functions but don't bother to declare them :-(
dnl Note: simple-minded pattern here will do wrong thing if stdio.h
dnl declares vsnprintf() but not snprintf().  Hopefully there are no
dnl systems that are *that* brain-damaged...
AC_EGREP_HEADER(snprintf, stdio.h, AC_DEFINE(HAVE_SNPRINTF_DECL))
AC_EGREP_HEADER(vsnprintf, stdio.h, AC_DEFINE(HAVE_VSNPRINTF_DECL))
dnl
dnl do this one the hard way in case isinf() is a macro
AC_MSG_CHECKING(for isinf)
AC_CACHE_VAL(ac_cv_func_or_macro_isinf,
[AC_TRY_LINK(
[#include <math.h>],
[double x = 0.0; int res = isinf(x);],
[ac_cv_func_or_macro_isinf=yes],
[ac_cv_func_or_macro_isinf=no])])
if [[ $ac_cv_func_or_macro_isinf = yes ]]; then
  AC_MSG_RESULT(yes)
  AC_DEFINE(HAVE_ISINF)
  ISINF=''
else
  AC_MSG_RESULT(no)
  ISINF='isinf.o'
fi
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)))

# On HPUX 9, rint() is not in regular libm.a but in /lib/pa1.1/libm.a;
# this hackery with HPUXMATHLIB allows us to cope.
HPUXMATHLIB=""
case "$host_cpu" in
  hppa1.1) 
	if [[ -r /lib/pa1.1/libm.a ]] ; then
	    HPUXMATHLIB="-L /lib/pa1.1 -lm"
	fi ;;
esac
AC_SUBST(HPUXMATHLIB)

AC_CHECK_FUNC(rint,
	      AC_DEFINE(HAVE_RINT),
	      AC_CHECK_LIB(m, rint, AC_DEFINE(HAVE_RINT), , $HPUXMATHLIB))

dnl Some old versions of libreadline don't have rl_completion_append_character
AC_EGREP_HEADER(rl_completion_append_character, readline.h,
	AC_DEFINE(HAVE_RL_COMPLETION_APPEND_CHARACTER),
	[AC_EGREP_HEADER(rl_completion_append_character, readline/readline.h,
		AC_DEFINE(HAVE_RL_COMPLETION_APPEND_CHARACTER))])
AC_SUBST(HAVE_RL_COMPLETION_APPEND_CHARACTER)

dnl Check for readline's filename_completion_function.
dnl Some versions have it but it's not in the headers, so we have to take
dnl care of that, too.
AC_CHECK_FUNCS(filename_completion_function,
    AC_EGREP_HEADER(filename_completion_function, readline.h,
        AC_DEFINE(HAVE_FILENAME_COMPLETION_FUNCTION_DECL),
        [AC_EGREP_HEADER(filename_completion_function, readline/readline.h,
            AC_DEFINE(HAVE_FILENAME_COMPLETION_FUNCTION_DECL))])
)
AC_SUBST(HAVE_FILENAME_COMPLETION_FUNCTION)
AC_SUBST(HAVE_FILENAME_COMPLETION_FUNCTION_DECL)

dnl Check for GNU style long options support (getopt_long)
AC_CHECK_FUNCS(getopt_long)

dnl Cannot use AC_CHECK_FUNC because finite may be a macro
AC_MSG_CHECKING(for finite)
AC_TRY_LINK([#include <math.h>],
	[int dummy=finite(1.0);],
	[AC_DEFINE(HAVE_FINITE) AC_MSG_RESULT(yes)],
	AC_MSG_RESULT(no))

dnl Cannot use AC_CHECK_FUNC because sigsetjmp may be a macro
dnl (especially on GNU libc)
dnl See also comments in config.h.
AC_MSG_CHECKING(for sigsetjmp)
AC_TRY_LINK([#include <setjmp.h>],
	[sigjmp_buf x; sigsetjmp(x, 1);],
	[AC_DEFINE(HAVE_SIGSETJMP) AC_MSG_RESULT(yes)],
	AC_MSG_RESULT(no))

AC_ARG_ENABLE(syslog, [  --enable-syslog         enable logging to syslog],
    [case $enableval in y|ye|yes)
	AC_CHECK_FUNC(syslog, [AC_DEFINE(ENABLE_SYSLOG)], [AC_MSG_ERROR([no syslog interface found])])
        ;;
     esac]
)

dnl Check to see if we have a working 64-bit integer type.
dnl This breaks down into two steps:
dnl (1) figure out if the compiler has a 64-bit int type with working
dnl arithmetic, and if so
dnl (2) see whether snprintf() can format the type correctly.  (Currently,
dnl snprintf is the only library routine we really need for int8 support.)
dnl It's entirely possible to have a compiler that handles a 64-bit type
dnl when the C library doesn't; this is fairly likely when using gcc on
dnl an older platform, for example.
dnl If there is no native snprintf() or it does not handle the 64-bit type,
dnl we force our own version of snprintf() to be used instead.
dnl Note this test must be run after our initial check for snprintf/vsnprintf.

HAVE_LONG_INT_64=0
AC_MSG_CHECKING(whether 'long int' is 64 bits)
AC_TRY_RUN([typedef long int int64;

/* These are globals to discourage the compiler from folding all the
 * arithmetic tests down to compile-time constants.
 */
int64 a = 20000001;
int64 b = 40000005;

int does_int64_work()
{
  int64 c,d;

  if (sizeof(int64) != 8)
    return 0;			/* doesn't look like the right size */

  /* Do perfunctory checks to see if 64-bit arithmetic seems to work */
  c = a * b;
  d = (c + b) / b;
  if (d != a+1)
    return 0;
  return 1;
}
main() {
  exit(! does_int64_work());
}],
	[HAVE_LONG_INT_64=1
	 AC_DEFINE(HAVE_LONG_INT_64)
	 AC_MSG_RESULT(yes)],
	AC_MSG_RESULT(no),
	AC_MSG_RESULT(assuming not on target machine))

HAVE_LONG_LONG_INT_64=0
if [[ $HAVE_LONG_INT_64 -eq 0 ]] ; then
AC_MSG_CHECKING(whether 'long long int' is 64 bits)
AC_TRY_RUN([typedef long long int int64;

/* These are globals to discourage the compiler from folding all the
 * arithmetic tests down to compile-time constants.
 */
int64 a = 20000001;
int64 b = 40000005;

int does_int64_work()
{
  int64 c,d;

  if (sizeof(int64) != 8)
    return 0;			/* doesn't look like the right size */

  /* Do perfunctory checks to see if 64-bit arithmetic seems to work */
  c = a * b;
  d = (c + b) / b;
  if (d != a+1)
    return 0;
  return 1;
}
main() {
  exit(! does_int64_work());
}],
	[HAVE_LONG_LONG_INT_64=1
	 AC_DEFINE(HAVE_LONG_LONG_INT_64)
	 AC_MSG_RESULT(yes)],
	AC_MSG_RESULT(no),
	AC_MSG_RESULT(assuming not on target machine))
fi

dnl If we found "long int" is 64 bits, assume snprintf handles it.
dnl If we found we need to use "long long int", better check.
dnl We cope with snprintfs that use either %lld or %qd as the format.
dnl If neither works, fall back to our own snprintf emulation (which we
dnl know uses %lld).

if [[ $HAVE_LONG_LONG_INT_64 -eq 1 ]] ; then
  if [[ x$SNPRINTF = x ]] ; then
    AC_MSG_CHECKING(whether snprintf handles 'long long int' as %lld)
    AC_TRY_RUN([#include <stdio.h>
typedef long long int int64;
#define INT64_FORMAT "%lld"

int64 a = 20000001;
int64 b = 40000005;

int does_int64_snprintf_work()
{
  int64 c;
  char buf[100];

  if (sizeof(int64) != 8)
    return 0;			/* doesn't look like the right size */

  c = a * b;
  snprintf(buf, 100, INT64_FORMAT, c);
  if (strcmp(buf, "800000140000005") != 0)
    return 0;			/* either multiply or snprintf is busted */
  return 1;
}
main() {
  exit(! does_int64_snprintf_work());
}],
	[ AC_MSG_RESULT(yes)
	  INT64_FORMAT='"%lld"'
	],
  [ AC_MSG_RESULT(no)
    AC_MSG_CHECKING(whether snprintf handles 'long long int' as %qd) 
    AC_TRY_RUN([#include <stdio.h>
typedef long long int int64;
#define INT64_FORMAT "%qd"
   
int64 a = 20000001;
int64 b = 40000005;
   
int does_int64_snprintf_work()
{  
  int64 c;
  char buf[100];

  if (sizeof(int64) != 8)
    return 0;     /* doesn't look like the right size */

  c = a * b;
  snprintf(buf, 100, INT64_FORMAT, c);
  if (strcmp(buf, "800000140000005") != 0)
    return 0;     /* either multiply or snprintf is busted */
  return 1;
}
main() {
  exit(! does_int64_snprintf_work());
}],
  [ AC_MSG_RESULT(yes)
    INT64_FORMAT='"%qd"'
  ],
  [ AC_MSG_RESULT(no)
	# Force usage of our own snprintf, since system snprintf is broken
	SNPRINTF='snprintf.o'
	INT64_FORMAT='"%lld"'
  ],
  [ AC_MSG_RESULT(assuming not on target machine)
	# Force usage of our own snprintf, since we cannot test foreign snprintf
	SNPRINTF='snprintf.o'
	INT64_FORMAT='"%lld"'
  ]) ],
  [ AC_MSG_RESULT(assuming not on target machine)
	# Force usage of our own snprintf, since we cannot test foreign snprintf
	SNPRINTF='snprintf.o'
	INT64_FORMAT='"%lld"'
  ])
  else
    # here if we previously decided we needed to use our own snprintf
    INT64_FORMAT='"%lld"'
  fi
else
  # Here if we are not using 'long long int' at all
  INT64_FORMAT='"%ld"'
fi

AC_DEFINE_UNQUOTED(INT64_FORMAT, $INT64_FORMAT)


dnl Determine memory alignment requirements for the basic C datatypes.

dnl CHECK_ALIGNOF(TYPE)
dnl This is modeled on the standard autoconf macro AC_CHECK_SIZEOF,
dnl except it finds the alignment requirement of the type instead of the size.
dnl The defined symbol is named ALIGNOF_TYPE, where the type name is
dnl converted in the same way as for AC_CHECK_SIZEOF.
dnl If cross-compiling, sizeof(type) is used as a default assumption.

AC_DEFUN(CHECK_ALIGNOF,
[changequote(<<, >>)dnl
dnl The name to #define.
define(<<AC_TYPE_NAME>>, translit(alignof_$1, [a-z *], [A-Z_P]))dnl
dnl The cache variable name.
define(<<AC_CV_NAME>>, translit(ac_cv_alignof_$1, [ *], [_p]))dnl
changequote([, ])dnl
AC_MSG_CHECKING(alignment of $1)
AC_CACHE_VAL(AC_CV_NAME,
[AC_TRY_RUN([#include <stdio.h>
struct { char filler; $1 field; } mystruct;
main()
{
  FILE *f=fopen("conftestval", "w");
  if (!f) exit(1);
  fprintf(f, "%d\n", ((char*) & mystruct.field) - ((char*) & mystruct));
  exit(0);
}], AC_CV_NAME=`cat conftestval`,
AC_CV_NAME='sizeof($1)',
AC_CV_NAME='sizeof($1)')])dnl
AC_MSG_RESULT($AC_CV_NAME)
AC_DEFINE_UNQUOTED(AC_TYPE_NAME, $AC_CV_NAME)
undefine([AC_TYPE_NAME])dnl
undefine([AC_CV_NAME])dnl
])

CHECK_ALIGNOF(short)
CHECK_ALIGNOF(int)
CHECK_ALIGNOF(long)
if [[ $HAVE_LONG_LONG_INT_64 -eq 1 ]] ; then
  CHECK_ALIGNOF(long long int)
fi
CHECK_ALIGNOF(double)

dnl Compute maximum alignment of any basic type.
dnl We assume long's alignment is at least as strong as char, short, or int;
dnl but we must check long long (if it exists) and double.

if [[ $ac_cv_alignof_double != 'sizeof(double)' ]] ; then
  MAX_ALIGNOF="$ac_cv_alignof_long"
  if [[ $MAX_ALIGNOF -lt $ac_cv_alignof_double ]] ; then
    MAX_ALIGNOF="$ac_cv_alignof_double"
  fi
  if [[ $HAVE_LONG_LONG_INT_64 -eq 1 ]] ; then
    if [[ $MAX_ALIGNOF -lt $ac_cv_alignof_long_long_int ]] ; then
      MAX_ALIGNOF="$ac_cv_alignof_long_long_int"
    fi
  fi
else
  dnl cross-compiling: assume that double's alignment is worst case
  MAX_ALIGNOF="$ac_cv_alignof_double"
fi
AC_DEFINE_UNQUOTED(MAXIMUM_ALIGNOF, $MAX_ALIGNOF)


dnl Check to see if platform has POSIX signal interface.
dnl NOTE: if this test fails then POSIX signals definitely don't work.
dnl It could be that the test compiles but the POSIX routines don't
dnl really work ... in that case the platform-specific port files
dnl can unset USE_POSIX_SIGNALS and HAVE_POSIX_SIGNALS.  (The former
dnl goes into config.h, the latter into Makefile.global.)

AC_MSG_CHECKING(for POSIX signal interface)
AC_TRY_LINK([#include <signal.h>],
[struct sigaction act, oact;
sigemptyset(&act.sa_mask);
act.sa_flags = SA_RESTART;
sigaction(0, &act, &oact);],
[AC_DEFINE(USE_POSIX_SIGNALS)
HAVE_POSIX_SIGNALS="1"
AC_MSG_RESULT(yes)],
[HAVE_POSIX_SIGNALS=""
AC_MSG_RESULT(no)])
AC_SUBST(HAVE_POSIX_SIGNALS)

dnl Check for Tcl configuration script tclConfig.sh

dnl If --with-tclconfig was given, don't check for tclsh, tcl
if test -z "$TCL_DIRS"
then
	AC_PATH_PROG(TCLSH, tclsh)
	if test -z "$TCLSH"
	then
		AC_PATH_PROG(TCLSH, tcl)
		if test -z "$TCLSH"
		then
			AC_MSG_WARN(TCL/TK support disabled; tcl shell is not in your path)
			USE_TCL=
		fi
	fi
fi
	
if test "$USE_TCL" = true
then
	AC_MSG_CHECKING(for tclConfig.sh)
	TCL_CONFIG_SH=
	library_dirs=
	if test -z "$TCL_DIRS"
	then
		library_dirs=`echo 'puts $auto_path' | $TCLSH`
	fi
	library_dirs="$TCL_DIRS $TK_DIRS $library_dirs"
	for dir in $library_dirs; do
		if test -d "$dir" -a -r "$dir/tclConfig.sh"; then
			TCL_CONFIG_SH=$dir/tclConfig.sh
			break
		fi
	done
	if test -z "$TCL_CONFIG_SH"; then
		AC_MSG_RESULT(no)
		AC_MSG_WARN(TCL/TK support disabled; Tcl configuration script missing)
		USE_TCL=
	else
		AC_MSG_RESULT($TCL_CONFIG_SH)
		AC_SUBST(TCL_CONFIG_SH)
	fi
fi

USE_TK=$USE_TCL		# If TCL is disabled, disable TK

dnl Check for Tk configuration script tkConfig.sh
if test "$USE_TK" = true
then
	AC_MSG_CHECKING(for tkConfig.sh)
	TK_CONFIG_SH=
	# library_dirs are set in the check for TCL
	for dir in $library_dirs
	do
		if test -d "$dir" -a -r "$dir/tkConfig.sh"
		then
			TK_CONFIG_SH=$dir/tkConfig.sh
			break
		fi
	done
	if test -z "$TK_CONFIG_SH"
	then
		AC_MSG_RESULT(no)
		AC_MSG_WARN(TK support disabled; Tk configuration script missing)
		USE_TK=
	else
		AC_MSG_RESULT($TK_CONFIG_SH)
		AC_SUBST(TK_CONFIG_SH)
		AC_PATH_PROG(WISH, wish)
	fi
fi

USE_X=$USE_TK

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 is bad news for pgtksh. Let the user fix this.
		AC_MSG_WARN([The X11 library '-lX11' could not be found,
so TK support will be disabled.  To enable TK support,
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.])
		USE_TK=
	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 cause configure to recurse into subdirectories with their own configure
dnl Darn, setting AC_CONFIG_SUBDIRS sets a list $subdirs$ in the configure output
dnl  file, but then configure doesn't bother using that list. Probably a bug in
dnl  this version of autoconf.
dnl So at the moment interfaces/odbc gets configured unconditionally.
dnl - thomas 1998-10-05
#if test "X$USE_ODBC" = "Xtrue"
#then
#	AC_CONFIG_SUBDIRS(interfaces/odbc)
#fi
if test "$USE_ODBC" = "true"
then
	PWD_INCDIR=no
	AC_CHECK_HEADER(pwd.h, PWD_INCDIR=yes)
	if test "$PWD_INCDIR" = "no"; then
		AC_MSG_WARN(odbc support disabled; pwd.h missing)
		USE_ODBC=
	fi
	AC_SUBST(USE_ODBC)
fi

dnl Output files that are neither makefiles nor shell scripts probably
dnl need fully-expanded substitutions, rather than partial expansions
dnl that include references to other variables.  Currently the only
dnl such item that's needed is an expanded version of libdir, but
dnl others may be needed someday.  NOTE: 'eval' technique only copes
dnl with one level of indirect reference per expansion; two levels is
dnl currently enough for libdir, but it's ugly...

dnl First we have to force 'NONE' prefix to be expanded itself.
dnl For some reason, autoconf 2.13 doesn't do this until AC_OUTPUT,
dnl which is too late...
test "x$prefix" = xNONE && prefix=$ac_default_prefix
test "x$exec_prefix" = xNONE && exec_prefix='${prefix}'

eval expanded_libdir="$libdir"
eval expanded_libdir="$expanded_libdir"
AC_SUBST(expanded_libdir)

dnl Finally ready to produce output files ...

AC_OUTPUT(
	GNUmakefile
	src/GNUmakefile
	src/Makefile.global
	src/backend/port/Makefile
	src/backend/catalog/genbki.sh
	src/backend/utils/Gen_fmgrtab.sh
	src/bin/pg_dump/Makefile
	src/bin/pg_version/Makefile
	src/bin/pgtclsh/mkMakefile.tcldefs.sh
	src/bin/pgtclsh/mkMakefile.tkdefs.sh
	src/bin/psql/Makefile
	src/include/version.h
	src/interfaces/libpq/Makefile
	src/interfaces/ecpg/lib/Makefile
	src/interfaces/ecpg/preproc/Makefile
	src/interfaces/libpq++/Makefile
	src/interfaces/libpgeasy/Makefile
	src/interfaces/libpgtcl/Makefile
	src/interfaces/odbc/GNUmakefile
	src/interfaces/odbc/Makefile.global
	src/pl/plpgsql/src/Makefile
	src/pl/plpgsql/src/mklang.sql
	src/pl/tcl/mkMakefile.tcldefs.sh
	src/test/regress/GNUmakefile
)