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_CONFIG_HEADER(include/config.h)

dnl Autoconf 2.12, at least, generates a useless relative path to install-sh
dnl unless we do this.
AC_CONFIG_AUX_DIR(`pwd`)

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=bsd need_tas=no
	case "$host_cpu" in
	  powerpc) elf=yes ;;
	esac ;;
  openbsd*) os=bsd need_tas=no ;;
    dgux*) os=dgux need_tas=no ;;
     aix*) os=aix need_tas=no ;;
nextstep*) os=nextstep need_tas=no ;;
  ultrix*) os=ultrix4 need_tas=no ;;
    irix*) os=irix5 need_tas=no ;;
    hpux*) os=hpux need_tas=yes tas_file=hpux.s ;;
     osf*) os=alpha need_tas=no ;;
     sco*) os=sco need_tas=no ;;
 machten*) os=machten need_tas=no ;;
  cygwin*) os=win need_tas=no ;;
 sysv4.2*)
       case "$host_vendor" in
	       univel) os=univel need_tas=no ;;
		    *) os=unknown need_tas=no ;;
       esac ;;
   sysv4*) os=svr4 need_tas=no ;;
   unixware*) 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$elf" = "Xyes"
then
	ELF_SYS=true
else
	ELF_SYS=
fi

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)

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 ],
    [
# First, try for a template exactly matching $host
if test -f "template/$host"
then TEMPLATE="$host"
else
    # Next try for an exact match to a .similar entry.
    # There shouldn't be multiple matches, but take the last if there are.
    GUESS=`grep "^$host=" template/.similar | sed 's/^.*=//' | tail -1`
    if test "$GUESS"
    then TEMPLATE="$GUESS"
    else
	# Next look for a .similar entry that is a prefix of $host.
	# If there are multiple matches, take the last one.
	exec 4<template/.similar
	while read LINE <&4
	do
	    SIMHOST=`expr "$LINE" : '\(.*\)='`
	    MATCH=`expr "$host" : "$SIMHOST"`
	    if test "$MATCH" != 0
	    then GUESS=`echo "$LINE" | sed 's/^.*=//'`
	    fi
	done
	exec 4<&-
	if test "$GUESS"
	then TEMPLATE="$GUESS"
	else
	    # Last chance ... maybe uname -s will match an entry.
	    TEMPLATE=`uname -s | tr A-Z a-z` 
	fi
    fi
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

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


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

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|EUC_CN|EUC_KR|EUC_TW|UNICODE|MULE_INTERNAL|LATIN1|LATIN2|LATIN3|LATIN4|LATIN5|KOI8|WIN|ALT)
	    AC_MSG_RESULT("enabled with $withval")
            ;;
	*)
	    AC_MSG_ERROR([*** You must supply an argument to the --with-mb option one of EUC_JP,EUC_CN,EUC_KR,EUC_TW,UNICODE,MULE_INTERNAL,LATIN1-5,KOI8,WIN,ALT])
	  ;;
	esac
	MULTIBYTE="$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 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 overide 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 overide 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 ],
   [
	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(include/port, interfaces/odbc/port)
   AC_LINK_FILES(makefiles, interfaces/odbc/makefiles)
   AC_LINK_FILES(template, interfaces/odbc/template)
   AC_LINK_FILES(include/config.h, 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)

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

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

AC_SUBST(ELF_SYS)
AC_SUBST(PORTNAME)
AC_SUBST(SRCDIR)
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_TK)
AC_SUBST(USE_PERL)
AC_SUBST(USE_ODBC)
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
  --without-CXX           prevent building C++ code ],
    [
	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)

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)

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)
AC_PATH_PROGS(GZCAT, gzcat zcat, gzcat)

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

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

AC_CHECK_LIB(sfio,     main)
for curses in ncurses curses ; do
	AC_CHECK_LIB(${curses}, main,
		[LIBS="-l${curses} $LIBS"; break])
done
AC_CHECK_LIB(termcap,  main)
AC_CHECK_LIB(history,  main)
AC_CHECK_LIB(readline, main)
AC_CHECK_LIB(readline, write_history, AC_DEFINE(HAVE_HISTORY))
if test "$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 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))

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_DEFINE(HAVE_DBL_MIN_PROBLEM) AC_MSG_RESULT(no)],
	AC_MSG_RESULT(assuming ok on target machine))

dnl Checks for library functions.
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)
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 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 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)
	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
	Makefile.global
	backend/port/Makefile
	backend/catalog/genbki.sh
	backend/utils/Gen_fmgrtab.sh
	bin/pg_dump/Makefile
	bin/pg_version/Makefile
	bin/psql/Makefile
	bin/pgtclsh/mkMakefile.tcldefs.sh
	bin/pgtclsh/mkMakefile.tkdefs.sh
	include/version.h
	interfaces/libpq/Makefile
	interfaces/ecpg/lib/Makefile
	interfaces/libpq++/Makefile
	interfaces/libpgtcl/Makefile
	interfaces/odbc/GNUmakefile
	interfaces/odbc/Makefile.global
	pl/plpgsql/src/Makefile
	pl/plpgsql/src/mklang.sql
	pl/tcl/mkMakefile.tcldefs.sh
)
