configure.in

dnl Process this file with autoconf to produce a configure script.
dnl $Header: /cvsroot/pgsql/configure.in,v 1.248 2003/05/09 16:52:10 momjian Exp $
dnl
dnl Developers, please strive to achieve this order:
dnl
dnl 0. Initialization and options processing
dnl 1. Programs
dnl 2. Libraries
dnl 3. Header files
dnl 4. Types
dnl 5. Structures
dnl 6. Compiler characteristics
dnl 7. Functions, global variables
dnl 8. System services
dnl
dnl Read the Autoconf manual for details.
dnl
m4_pattern_forbid(^PGAC_)dnl to catch undefined macros
dnl
dnl The GNU folks apparently haven't heard that some people don't use
dnl Texinfo. Use this sorcery to use "docdir" instead of "infodir".
m4_define([info], [doc])
m4_define([infodir], [docdir])
AC_INIT([PostgreSQL], [7.4devel], [pgsql-bugs@postgresql.org])
m4_undefine([infodir])
m4_undefine([info])
AC_SUBST(docdir)

AC_PREREQ(2.53)
AC_COPYRIGHT([Copyright 2002 PostgreSQL Global Development Group])
AC_CONFIG_SRCDIR([src/backend/access/common/heaptuple.c])
AC_CONFIG_AUX_DIR(config)
AC_PREFIX_DEFAULT(/usr/local/pgsql)
AC_SUBST(configure_args, [$ac_configure_args])

AC_DEFINE_UNQUOTED(PG_VERSION, "$PACKAGE_VERSION", [PostgreSQL version])

AC_CANONICAL_HOST

template=
AC_MSG_CHECKING([which template to use])

PGAC_ARG_REQ(with, template, [],
[
  case $withval in
    list)   echo; ls "$srcdir/src/template"; exit;;
    *)      if test -f "$srcdir/src/template/$with_template" ; then
              template=$withval
            else
              AC_MSG_ERROR(['$withval' is not a valid template name. Use 'list' for a list.])
            fi;;
  esac
],
[
  # --with-template not given

case $host_os in
     aix*) template=aix ;;
    beos*) template=beos ;;
    bsdi*) template=bsdi ;;
  cygwin*) template=cygwin ;;
  darwin*) template=darwin ;;
    dgux*) template=dgux ;;
 freebsd*) template=freebsd ;;
    hpux*) template=hpux ;;
    irix*) template=irix5 ;;
   linux*) template=linux ;;
   mingw*) template=win ;;
  netbsd*) template=netbsd ;;
nextstep*) template=nextstep ;;
 openbsd*) template=openbsd ;;
     osf*) template=osf ;;
     qnx*) template=qnx4 ;;
     sco*) template=sco ;;
 solaris*) template=solaris ;;
   sunos*) template=sunos4 ;;
 sysv4.2*)
        case $host_vendor in
          univel) template=univel ;;
        esac ;;
   sysv4*) template=svr4 ;;
   sysv5*) template=unixware ;;
  ultrix*) template=ultrix4 ;;
esac

  if test x"$template" = x"" ; then
    AC_MSG_ERROR([[
*******************************************************************
PostgreSQL has apparently not been ported to your platform yet.
To try a manual configuration, look into the src/template directory
for a similar platform and use the '--with-template=' option.

Please also contact <pgsql-ports@postgresql.org> to see about
rectifying this.  Include the above 'checking host system type...'
line.
*******************************************************************
]])
  fi

])

AC_MSG_RESULT([$template])

PORTNAME=$template
AC_SUBST(PORTNAME)

# Pick right test-and-set (TAS) code.  Most platforms have inline
# assembler code in src/include/storage/s_lock.h, so we just use
# a dummy file here.
case $host in
  *-*-hpux*)        need_tas=yes; tas_file=hpux.s ;;
  sparc-*-solaris*) need_tas=yes; tas_file=solaris_sparc.s ;;
  i?86-*-solaris*)   need_tas=yes; tas_file=solaris_i386.s ;;
  *)                need_tas=no;  tas_file=dummy.s ;;
esac
AC_CONFIG_LINKS([src/backend/port/tas.s:src/backend/port/tas/${tas_file}])

if test "$need_tas" = yes ; then
  TAS=tas.o
fi
AC_SUBST(TAS)



##
## Command line options
##


#
# Add non-standard directories to the include path
#
PGAC_ARG_REQ(with, includes, [  --with-includes=DIRS    look for additional header files in DIRS])


#
# Add non-standard directories to the library search path
#
PGAC_ARG_REQ(with, libraries, [  --with-libraries=DIRS   look for additional libraries in DIRS],
             [LIBRARY_DIRS=$withval])

PGAC_ARG_REQ(with, libs,      [  --with-libs=DIRS        alternative spelling of --with-libraries],
             [LIBRARY_DIRS=$withval])


#
# 64-bit integer date/time storage (--enable-integer-datetimes)
#
AC_MSG_CHECKING([whether to build with 64-bit integer date/time support])
PGAC_ARG_BOOL(enable, integer-datetimes, no, [  --enable-integer-datetimes  enable 64-bit integer date/time support],
              [AC_DEFINE([USE_INTEGER_DATETIMES], 1,
                         [Define to 1 if you want 64-bit integer timestamp and interval support. (--enable-integer-datetimes)])])
AC_MSG_RESULT([$enable_integer_datetimes])


# Character set recode (--enable-recode)
#
AC_MSG_CHECKING([whether to build with recode support])
PGAC_ARG_BOOL(enable, recode, no, [  --enable-recode         enable single-byte recode support],
              [AC_DEFINE([CYR_RECODE], 1,
                         [Define to 1 if you want single-byte recode support. (--enable-recode)])])
AC_MSG_RESULT([$enable_recode])


#
# NLS
#
AC_MSG_CHECKING([whether NLS is wanted])
PGAC_ARG_OPTARG(enable, nls,
                [[  --enable-nls[=LANGUAGES]  enable Native Language Support]],
                [],
                [WANTED_LANGUAGES=$enableval],
                [AC_DEFINE(ENABLE_NLS, 1,
                           [Define to 1 if you want National Language Support. (--enable-nls)])])
AC_MSG_RESULT([$enable_nls])
AC_SUBST(enable_nls)
AC_SUBST(WANTED_LANGUAGES)

#
# Default port number (--with-pgport), default 5432
#
AC_MSG_CHECKING([for default port number])
PGAC_ARG_REQ(with, pgport, [  --with-pgport=PORTNUM   change default port number [5432]],
             [default_port=$withval],
             [default_port=5432])
AC_MSG_RESULT([$default_port])
# Need both of these because some places want an integer and some a string
AC_DEFINE_UNQUOTED(DEF_PGPORT, ${default_port},
[Define to the default TCP port number on which the server listens and
to which clients will try to connect to.  This can be overridden at
run-time, but it's convenient if your clients have the right default
compiled in.  (--with-pgport=PORTNUM)])
AC_DEFINE_UNQUOTED(DEF_PGPORT_STR, "${default_port}",
                   [Define to the default TCP port number as string constant.])
AC_SUBST(default_port)

#
# Option to disable shared libraries
#
PGAC_ARG_BOOL(enable, shared, yes,
              [  --disable-shared        do not build shared libraries])
AC_SUBST(enable_shared)

#
# '-rpath'-like feature can be disabled
#
PGAC_ARG_BOOL(enable, rpath, yes,
              [  --disable-rpath         do not embed shared library search path in executables])
AC_SUBST(enable_rpath)


#
# --enable-debug adds -g to compiler flags
#
PGAC_ARG_BOOL(enable, debug, no,
              [  --enable-debug          build with debugging symbols (-g)])
AC_SUBST(enable_debug)

#
# C compiler
#

# For historical reasons you can also use --with-CC to specify the C compiler
# to use, although the standard way to do this is to set the CC environment
# variable.
PGAC_ARG_REQ(with, CC, [], [CC=$with_CC])

case $template in
  aix) pgac_cc_list="gcc xlc";;
 irix) pgac_cc_list="cc";; # no gcc
    *) pgac_cc_list="gcc cc";;
esac

AC_PROG_CC([$pgac_cc_list])
# Read the template
. "$srcdir/src/template/$template" || exit

if test "$ac_env_CFLAGS_set" = set; then
  CFLAGS=$ac_env_CFLAGS_value
fi
if test "$enable_debug" = yes && test "$ac_cv_prog_cc_g" = yes; then
  CFLAGS="$CFLAGS -g"
fi
AC_MSG_NOTICE([using CFLAGS=$CFLAGS])

# Check if the compiler still works with the template settings
AC_MSG_CHECKING([whether the C compiler still works])
AC_TRY_LINK([], [return 0;],
  [AC_MSG_RESULT(yes)],
  [AC_MSG_RESULT(no)
   AC_MSG_ERROR([cannot proceed])])

# Defend against gcc -ffastmath
if test "$GCC" = yes; then
AC_TRY_COMPILE([], [@%:@ifdef __FAST_MATH__
choke me
@%:@endif], [], [AC_MSG_ERROR([do not put -ffast-math in CFLAGS])])
fi

AC_PROG_CPP
AC_SUBST(GCC)

# Create compiler version string
if test x"$GCC" = x"yes" ; then
  cc_string="GCC `${CC} --version | sed q`"
else
  cc_string=$CC
fi
AC_DEFINE_UNQUOTED(PG_VERSION_STR,
                   ["PostgreSQL $PACKAGE_VERSION on $host, compiled by $cc_string"],
                   [A string containing the version number, platform, and C compiler])


#
# Automatic dependency tracking
#
PGAC_ARG_BOOL(enable, depend, no, [  --enable-depend         turn on automatic dependency tracking],
              [autodepend=yes])
AC_SUBST(autodepend)


#
# Enable assert checks
#
PGAC_ARG_BOOL(enable, cassert, no, [  --enable-cassert        enable assertion checks (for debugging)],
              [AC_DEFINE([USE_ASSERT_CHECKING], 1,
                         [Define to 1 to build with assertion checks. (--enable-cassert)])])


#
# Include directories
#
ac_save_IFS=$IFS
IFS="${IFS}:"
# SRCH_INC comes from the template file
for dir in $with_includes $SRCH_INC; do
  if test -d "$dir"; then
    INCLUDES="$INCLUDES -I$dir"
  else
    AC_MSG_WARN([*** Include directory $dir does not exist.])
  fi
done
IFS=$ac_save_IFS
AC_SUBST(INCLUDES)


#
# Library directories
#
ac_save_IFS=$IFS
IFS="${IFS}:"
# LIBRARY_DIRS comes from command line, SRCH_LIB from template file.
for dir in $LIBRARY_DIRS $SRCH_LIB; do
  if test -d "$dir"; then
    LIBDIRS="$LIBDIRS -L$dir"
  else
    AC_MSG_WARN([*** Library directory $dir does not exist.])
  fi
done
IFS=$ac_save_IFS


#
# Tcl/Tk
#
AC_MSG_CHECKING([whether to build with Tcl])
PGAC_ARG_BOOL(with, tcl, no, [  --with-tcl              build Tcl and Tk interfaces])
AC_MSG_RESULT([$with_tcl])
AC_SUBST([with_tcl])

# If Tcl is enabled (above) then Tk is also, unless the user disables it using --without-tk
AC_MSG_CHECKING([whether to build with Tk])
if test "$with_tcl" = yes; then
  PGAC_ARG_BOOL(with, tk, yes, [  --without-tk            do not build Tk interfaces if Tcl is enabled])
else
  with_tk=no
fi
AC_MSG_RESULT([$with_tk])
AC_SUBST([with_tk])


# We see if the path to the Tcl/Tk configuration scripts is specified.
# This will override the use of tclsh to find the paths to search.

PGAC_ARG_REQ(with, tclconfig, [  --with-tclconfig=DIR    tclConfig.sh and tkConfig.sh are in DIR])

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

PGAC_ARG_REQ(with, tkconfig,  [  --with-tkconfig=DIR     tkConfig.sh is in DIR])

#
# Optionally build Perl modules (PL/Perl)
#
AC_MSG_CHECKING([whether to build Perl modules])
PGAC_ARG_BOOL(with, perl, no, [  --with-perl             build Perl modules (PL/Perl)])
AC_MSG_RESULT([$with_perl])
AC_SUBST(with_perl)

#
# Optionally build Python interface module
#
AC_MSG_CHECKING([whether to build Python modules])
PGAC_ARG_BOOL(with, python, no, [  --with-python           build Python interface module])
AC_MSG_RESULT([$with_python])
AC_SUBST(with_python)

#
# Optionally build the Java/JDBC tools
#
AC_MSG_CHECKING([whether to build Java/JDBC tools])
PGAC_ARG_BOOL(with, java, no, [  --with-java             build JDBC interface and Java tools],
[AC_MSG_RESULT(yes)
PGAC_PATH_ANT
if test -z "$ANT"; then
  AC_MSG_ERROR([Ant is required to build Java components
If you have Ant already installed, see config.log for details on the failure.])
fi
if "$ANT" -version | sed q | egrep -v ' 1\.[[5-9]]| [[2-9]]\.' >/dev/null ; then
  AC_MSG_ERROR([Ant version >= 1.5 is required to build Java components])
fi],
[AC_MSG_RESULT(no)])
AC_SUBST(with_java)

dnl A note on the Kerberos and OpenSSL options:
dnl
dnl The user can give an argument to the option in order the specify
dnl the base path of the respective installation (what he specified
dnl perhaps as --prefix). If no argument is given ($withval is "yes")
dnl then we take the path where the package installs by default. This
dnl way the user doesn't have to use redundant --with-includes and
dnl --with-libraries options, but he can still use them if the layout
dnl is non-standard.

#
# Kerberos 4
#
AC_MSG_CHECKING([whether to build with Kerberos 4 support])
PGAC_ARG_OPTARG(with, krb4, [[  --with-krb4[=DIR]       build with Kerberos 4 support [/usr/athena]]],
                [krb4_prefix=/usr/athena],
                [krb4_prefix=$withval],
[
  AC_MSG_RESULT(yes)
  AC_DEFINE(KRB4, 1, [Define to build with Kerberos 4 support. (--with-krb4)])

  if test -d "$krb4_prefix/include"; then
    INCLUDES="$INCLUDES -I$krb4_prefix/include"
  fi
  if test -d "$krb4_prefix/lib"; then
    LIBDIRS="$LIBDIRS -L$krb4_prefix/lib"
  fi

  krb_srvtab="/etc/srvtab"
],
[AC_MSG_RESULT(no)])

AC_SUBST(with_krb4)


#
# Kerberos 5
#
AC_MSG_CHECKING([whether to build with Kerberos 5 support])
PGAC_ARG_OPTARG(with, krb5, [[  --with-krb5[=DIR]       build with Kerberos 5 support [/usr/athena]]],
              [krb5_prefix=/usr/athena],
              [krb5_prefix=$withval],
[
  AC_MSG_RESULT([yes])
  AC_DEFINE(KRB5, 1, [Define to build with Kerberos 5 support. (--with-krb5)])

  if test -d "$krb5_prefix/include"; then
    INCLUDES="$INCLUDES -I$krb5_prefix/include"
  fi
  if test -d "$krb5_prefix/lib"; then
    LIBDIRS="$LIBDIRS -L$krb5_prefix/lib"
  fi

  krb_srvtab="FILE:\$(sysconfdir)/krb5.keytab"
],
[AC_MSG_RESULT(no)])

AC_SUBST(with_krb5)


# Using both Kerberos 4 and Kerberos 5 at the same time isn't going to work.
if test "$with_krb4" = yes && test "$with_krb5" = yes ; then
  AC_MSG_ERROR([Kerberos 4 and Kerberos 5 support cannot be combined])
fi

AC_SUBST(krb_srvtab)


#
# Kerberos configuration parameters
#
PGAC_ARG_REQ(with, krb-srvnam,
             [  --with-krb-srvnam=NAME  name of the service principal in Kerberos [postgres]],
             [],
             [with_krb_srvnam="postgres"])
AC_DEFINE_UNQUOTED([PG_KRB_SRVNAM], ["$with_krb_srvnam"],
                   [Define to the name of the PostgreSQL service principal in Kerberos. (--with-krb-srvnam=NAME)])


#
# PAM
#
AC_MSG_CHECKING([whether to build with PAM support])
PGAC_ARG_BOOL(with, pam, no,
              [  --with-pam              build with PAM support],
              [AC_DEFINE([USE_PAM], 1, [Define to 1 to build with PAM support. (--with-pam)])])
AC_MSG_RESULT([$with_pam])
AC_SUBST(with_pam)


#
# OpenSSL
#
PGAC_ARG_OPTARG(with, openssl,
                [[  --with-openssl[=DIR]    build with OpenSSL support [/usr/local/ssl]]],
                [openssl_prefix=/usr/local/ssl],
                [openssl_prefix=$withval],
[
  AC_MSG_RESULT([building with OpenSSL support])
  AC_DEFINE([USE_SSL], 1, [Define to build with (Open)SSL support. (--with-openssl)])

  if test -d "${openssl_prefix}/include" ; then
    INCLUDES="$INCLUDES -I${openssl_prefix}/include"
  fi
  if test -d "${openssl_prefix}/lib" ; then
    LIBDIRS="$LIBDIRS -L${openssl_prefix}/lib"
  fi
])

AC_SUBST(with_openssl)


#
# Readline
#
PGAC_ARG_BOOL(with, readline, yes,
              [  --without-readline      do not use Readline])

#
# Zlib
#
PGAC_ARG_BOOL(with, zlib, yes,
              [  --without-zlib          do not use Zlib])



# Assume system is ELF if it predefines __ELF__ as 1,
# otherwise believe host_os based default.
case $host_os in
    freebsd1*|freebsd2*) elf=no;;
    freebsd3*|freebsd4*) elf=yes;;
esac

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)



CPPFLAGS="$CPPFLAGS $INCLUDES"
LDFLAGS="$LDFLAGS $LIBDIRS"

AC_MSG_NOTICE([using CPPFLAGS=$CPPFLAGS])
AC_MSG_NOTICE([using LDFLAGS=$LDFLAGS])


AC_PROG_AWK
PGAC_PATH_FLEX
AC_PROG_LN_S
AC_PROG_LD
AC_SUBST(LD)
AC_SUBST(with_gnu_ld)
case $host_os in sysv5*)
  AC_CACHE_CHECK([whether ld -R works], [pgac_cv_prog_ld_R],
  [
    pgac_save_LDFLAGS=$LDFLAGS; LDFLAGS="$LDFLAGS -Wl,-R/usr/lib"
    AC_TRY_LINK([], [], [pgac_cv_prog_ld_R=yes], [pgac_cv_prog_ld_R=no])
    LDFLAGS=$pgac_save_LDFLAGS
  ])
  ld_R_works=$pgac_cv_prog_ld_R
  AC_SUBST(ld_R_works)
esac
AC_PROG_RANLIB
AC_CHECK_PROGS(LORDER, lorder)
AC_PATH_PROG(TAR, tar)
PGAC_CHECK_STRIP

AC_CHECK_PROGS(YACC, ['bison -y'])
if test -z "$YACC"; then
  AC_MSG_WARN([
*** Without Bison you will not be able to build PostgreSQL from CVS or
*** change any of the parser definition files.  You can obtain Bison from
*** a GNU mirror site.  (If you are using the official distribution of
*** PostgreSQL then you do not need to worry about this because the Bison
*** output is pre-generated.)  To use a different yacc program (possible,
*** but not recommended), set the environment variable YACC before running
*** 'configure'.])
fi
AC_SUBST(YFLAGS)

PGAC_PATH_PERL
if test "$with_perl" = yes; then
  PGAC_CHECK_PERL_CONFIGS([archlibexp,privlibexp,useshrplib])
  PGAC_CHECK_PERL_EMBED_LDFLAGS
fi

if test "$with_python" = yes; then
  PGAC_PATH_PYTHON
  PGAC_CHECK_PYTHON_MODULE_SETUP
  PGAC_CHECK_PYTHON_EMBED_SETUP
fi


##
## Libraries
##

if test "$PORTNAME" != "aix" -a "$PORTNAME" != "alpha"
then
	AC_CHECK_LIB(bsd,      main)
fi
AC_CHECK_LIB(util,     setproctitle)
AC_CHECK_LIB(m,        main)
AC_CHECK_LIB(dl,       main)
AC_CHECK_LIB(nsl,      main)
AC_CHECK_LIB(socket,   main)
AC_CHECK_LIB(ipc,      main)
AC_CHECK_LIB(IPC,      main)
AC_CHECK_LIB(lc,       main)
AC_CHECK_LIB(dld,      main)
AC_CHECK_LIB(ld,       main)
AC_CHECK_LIB(compat,   main)
AC_CHECK_LIB(BSD,      main)
AC_CHECK_LIB(gen,      main)
AC_CHECK_LIB(PW,       main)
AC_CHECK_LIB(resolv,   main)
AC_SEARCH_LIBS(getopt_long, [getopt gnugetopt])
# QNX:
AC_CHECK_LIB(unix, main)
AC_SEARCH_LIBS(crypt,  crypt)
# BeOS:
AC_CHECK_LIB(bind, __inet_ntoa)
# Solaris:
AC_SEARCH_LIBS(fdatasync, [rt posix4])
# Cygwin:
AC_CHECK_LIB(cygipc, shmget)

if test "$with_readline" = yes; then
  PGAC_CHECK_READLINE
  if test x"$pgac_cv_check_readline" = x"no"; then
    AC_MSG_ERROR([readline library not found
If you have readline already installed, see config.log for details on the
failure.  It is possible the compiler isn't looking in the proper directory.
Use --without-readline to disable readline support.])
  fi
fi

if test "$with_zlib" = yes; then
  AC_CHECK_LIB(z, inflate, [],
               [AC_MSG_ERROR([zlib library not found
If you have zlib already installed, see config.log for details on the
failure.  It is possible the compiler isn't looking in the proper directory.
Use --without-zlib to disable zlib support.])])
fi

if test "$with_krb4" = yes ; then
  AC_CHECK_LIB(des, des_encrypt, [], [AC_MSG_ERROR([library 'des' is required for Kerberos 4])])
  AC_CHECK_LIB(krb, krb_sendauth, [], [AC_MSG_ERROR([library 'krb' is required for Kerberos 4])])
fi

if test "$with_krb5" = yes ; then
  AC_SEARCH_LIBS(com_err, [krb5 'krb5 -ldes -lasn1 -lroken' com_err], [],
                 [AC_MSG_ERROR([could not find function 'com_err' required for Kerberos 5])])
  AC_SEARCH_LIBS(krb5_encrypt, [krb5 'krb5 -ldes -lasn1 -lroken' crypto k5crypto], [],
                 [AC_MSG_ERROR([could not find function 'krb5_encrypt' required for Kerberos 5])])
  AC_SEARCH_LIBS(krb5_sendauth, [krb5 'krb5 -ldes -lasn1 -lroken'], [],
                 [AC_MSG_ERROR([could not find function 'krb5_sendauth' required for Kerberos 5])])
fi

if test "$with_openssl" = yes ; then
  dnl Order matters!
  AC_CHECK_LIB(crypto, CRYPTO_new_ex_data, [], [AC_MSG_ERROR([library 'crypto' is required for OpenSSL])])
  AC_CHECK_LIB(ssl,    SSL_library_init, [], [AC_MSG_ERROR([library 'ssl' is required for OpenSSL])])
fi

if test "$with_pam" = yes ; then
  AC_CHECK_LIB(pam,    pam_start, [], [AC_MSG_ERROR([library 'pam' is required for PAM])])
fi


##
## Header files
##

dnl sys/socket.h is required by AC_FUNC_ACCEPT_ARGTYPES
AC_CHECK_HEADERS([crypt.h dld.h endian.h fp_class.h getopt.h ieeefp.h poll.h pwd.h sys/ipc.h sys/poll.h sys/pstat.h sys/select.h sys/sem.h sys/socket.h sys/shm.h sys/un.h termios.h utime.h kernel/OS.h kernel/image.h SupportDefs.h])

# At least on IRIX, cpp test for netinet/tcp.h will fail unless
# netinet/in.h is included first.
AC_CHECK_HEADERS(netinet/in.h)
AC_CHECK_HEADERS(netinet/tcp.h, [], [],
[AC_INCLUDES_DEFAULT
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
])

if test "$with_readline" = yes; then
  AC_CHECK_HEADERS(readline/readline.h, [],
                   [AC_CHECK_HEADERS(editline/readline.h, [],
                         [AC_CHECK_HEADERS(readline.h, [],
                                     [AC_MSG_ERROR([readline header not found
If you have readline already installed, see config.log for details on the
failure.  It is possible the compiler isn't looking in the proper directory.
Use --without-readline to disable readline support.])])])])
  AC_CHECK_HEADERS(readline/history.h, [],
                   [AC_CHECK_HEADERS(editline/history.h, [],
                         [AC_CHECK_HEADERS(history.h, [],
                                     [AC_MSG_ERROR([history header not found
If you have readline already installed, see config.log for details on the
failure.  It is possible the compiler isn't looking in the proper directory.
Use --without-readline to disable readline support.])])])])
fi

if test "$with_zlib" = yes; then
  AC_CHECK_HEADER(zlib.h, [], [AC_MSG_ERROR([zlib header not found
If you have zlib already installed, see config.log for details on the
failure.  It is possible the compiler isn't looking in the proper directory.
Use --without-zlib to disable zlib support.])])
fi

if test "$with_krb4" = yes ; then
  AC_CHECK_HEADER(krb.h, [], [AC_MSG_ERROR([header file <krb.h> is required for Kerberos 4])])
fi

if test "$with_krb5" = yes ; then
  AC_CHECK_HEADER(krb5.h, [], [AC_MSG_ERROR([header file <krb5.h> is required for Kerberos 5])])
  AC_CHECK_HEADER(com_err.h, [], [AC_MSG_ERROR([header file <com_err.h> is required for Kerberos 5])])
fi

if test "$with_openssl" = yes ; then
  AC_CHECK_HEADER(openssl/ssl.h, [], [AC_MSG_ERROR([header file <openssl/ssl.h> is required for OpenSSL])])
  AC_CHECK_HEADER(openssl/err.h, [], [AC_MSG_ERROR([header file <openssl/err.h> is required for OpenSSL])])
fi

if test "$with_pam" = yes ; then
  AC_CHECK_HEADERS(security/pam_appl.h, [],
                   [AC_CHECK_HEADERS(pam/pam_appl.h, [],
                                     [AC_MSG_ERROR([header file <security/pam_appl.h> or <pam/pam_appl.h> is required for PAM.])])])
fi


##
## Types, structures, compiler characteristics
##

m4_defun([AC_PROG_CC_STDC], []) dnl We don't want that.
AC_C_CONST
AC_C_INLINE
AC_C_STRINGIZE
PGAC_C_SIGNED
AC_C_VOLATILE
PGAC_C_FUNCNAME_SUPPORT
AC_STRUCT_TIMEZONE
PGAC_UNION_SEMUN
PGAC_STRUCT_SOCKADDR_UN
PGAC_STRUCT_ADDRINFO

AC_CHECK_TYPES([struct cmsgcred, struct fcred, struct sockcred], [], [],
[#include <sys/param.h>
#include <sys/socket.h>
#include <sys/ucred.h>])

if test "$with_zlib" = yes; then
  # Check that <zlib.h> defines z_streamp (versions before about 1.0.4
  # did not).  While we could work around the lack of z_streamp, it
  # seems unwise to encourage people to use such old zlib versions...
  AC_CHECK_TYPE(z_streamp, [], [AC_MSG_ERROR([zlib version is too old
Use --without-zlib to disable zlib support.])],
                [#include <zlib.h>])
fi

if test "$with_krb5" = yes; then
# Check for differences between MIT and Heimdal (KTH) releases
  AC_CHECK_MEMBERS(krb5_ticket.enc_part2, [],
                   [AC_CHECK_MEMBERS(krb5_ticket.client, [],
                                     [AC_MSG_ERROR([could not determine how to get client name from Kerberos 5 ticket])],
                                     [#include <krb5.h>])],
                   [#include <krb5.h>])
  AC_CHECK_MEMBERS(krb5_error.text.data, [],
                   [AC_CHECK_MEMBERS(krb5_error.e_data, [],
                                     [AC_MSG_ERROR([could not determine how to extract Kerberos 5 error messages])],
                                     [#include <krb5.h>])],
                   [#include <krb5.h>])
fi


##
## Functions, global variables
##

PGAC_VAR_INT_TIMEZONE
AC_FUNC_ACCEPT_ARGTYPES
PGAC_FUNC_GETTIMEOFDAY_1ARG

# SunOS doesn't handle negative byte comparisons properly with +/- return
AC_FUNC_MEMCMP

AC_CHECK_FUNCS([cbrt dlopen fcvt fdatasync getpeereid memmove poll pstat setproctitle setsid sigprocmask symlink sysconf utime utimes waitpid])

AC_CHECK_DECLS(fdatasync, [], [], [#include <unistd.h>])

AC_CHECK_TYPE([struct sockaddr_in6],
              [AC_CHECK_FUNC(inet_ntop,
                             [AC_DEFINE(HAVE_IPV6, 1, [Define to 1 if you have support for IPv6.])])],
              [],
[$ac_includes_default
#include <netinet/in.h>])

AC_CACHE_CHECK([for PS_STRINGS], [pgac_cv_var_PS_STRINGS],
[AC_TRY_LINK(
[#include <machine/vmparam.h>
#include <sys/exec.h>
],
[PS_STRINGS->ps_nargvstr = 1;
PS_STRINGS->ps_argvstr = "foo";],
[pgac_cv_var_PS_STRINGS=yes],
[pgac_cv_var_PS_STRINGS=no])])
if test "$pgac_cv_var_PS_STRINGS" = yes ; then
  AC_DEFINE([HAVE_PS_STRINGS], [], [Define to 1 if the PS_STRINGS thing exists.])
fi


# We use our snprintf.c emulation if either snprintf() or vsnprintf()
# is missing.  Yes, there are machines that have only one.  We may
# also decide to use snprintf.c if snprintf() is present but does not
# have working "long long int" support -- see below.

pgac_need_repl_snprintf=no
AC_CHECK_FUNCS(snprintf, [], pgac_need_repl_snprintf=yes)
AC_CHECK_FUNCS(vsnprintf, [], pgac_need_repl_snprintf=yes)


# Check whether <stdio.h> declares snprintf() and vsnprintf(); if not,
# include/c.h will provide declarations.  Note this is a separate test
# from whether the functions exist in the C library --- there are
# systems that have the functions but don't bother to declare them :-(

AC_CHECK_DECLS([snprintf, vsnprintf])


# do this one the hard way in case isinf() is a macro
AC_CACHE_CHECK([for isinf], ac_cv_func_isinf,
[AC_TRY_LINK(
[#include <math.h>
],
[double x = 0.0; int res = isinf(x);],
[ac_cv_func_isinf=yes],
[ac_cv_func_isinf=no])])

if test $ac_cv_func_isinf = yes ; then
  AC_DEFINE(HAVE_ISINF, 1, [Define to 1 if you have isinf().])
else
  AC_LIBOBJ(isinf)
  # Look for a way to implement a substitute for isinf()
  AC_CHECK_FUNCS([fpclass fp_class fp_class_d class], [break])
fi

AC_REPLACE_FUNCS([crypt fseeko gethostname getopt_long getrusage inet_aton random rint srandom strcasecmp strdup strerror strtol strtoul])

# system's version of getaddrinfo(), if any, may be used only if we found
# a definition for struct addrinfo; see notes in src/include/getaddrinfo.h
if test x"$ac_cv_type_struct_addrinfo" = xyes ; then
  AC_REPLACE_FUNCS([getaddrinfo])
else
  AC_LIBOBJ(getaddrinfo)
fi

# BSD/OS & NetBSD use a custom fseeko/ftello built on fsetpos/fgetpos
# We override the previous test that said fseeko/ftello didn't exist
# OS tests are also done in include/c.h and port/fseeko.c
case $host_os in bsdi*|netbsd*)
ac_cv_func_fseeko=yes
esac

# Solaris has a very slow qsort in certain cases, so we replace it.
case $host_os in solaris*) 
AC_LIBOBJ(qsort) ;;
esac

# Win32 can't to rename or unlink on an open file
case $host_os in win32*) 
AC_LIBOBJ(dirmod)
AC_LIBOBJ(opendir) ;;
esac

# Now that rint() is /port, I am not sure this still works, bjm 2003-05-09
# 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 test -r /lib/pa1.1/libm.a ; then
	    HPUXMATHLIB="-L /lib/pa1.1 -lm"
	fi ;;
esac
AC_SUBST(HPUXMATHLIB)

AC_CHECK_FUNCS(rint, [],
               [AC_CHECK_LIB(m, rint, AC_DEFINE(HAVE_RINT), , $HPUXMATHLIB)])


if test "$with_readline" = yes; then
  PGAC_VAR_RL_COMPLETION_APPEND_CHARACTER
  AC_CHECK_FUNCS([rl_completion_matches rl_filename_completion_function])
  AC_CHECK_FUNCS([replace_history_entry])
fi


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, 1, [Define to 1 if you 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 c.h.
AC_MSG_CHECKING(for sigsetjmp)
AC_TRY_LINK([#include <setjmp.h>],
            [sigjmp_buf x; sigsetjmp(x, 1);],
            [AC_DEFINE(HAVE_SIGSETJMP, 1, [Define to 1 if you have sigsetjmp().])
AC_MSG_RESULT(yes)],
            [AC_MSG_RESULT(no)])

AC_CHECK_FUNC(syslog,
              [AC_CHECK_HEADER(syslog.h,
                               [AC_DEFINE(HAVE_SYSLOG, 1, [Define to 1 if you have the syslog interface.])])])

AC_CACHE_CHECK([for optreset], pgac_cv_var_int_optreset,
[AC_TRY_LINK([#include <unistd.h>],
  [extern int optreset; optreset = 1;],
  [pgac_cv_var_int_optreset=yes],
  [pgac_cv_var_int_optreset=no])])
if test x"$pgac_cv_var_int_optreset" = x"yes"; then
  AC_DEFINE(HAVE_INT_OPTRESET, 1, [Define to 1 if you have the global variable 'int optreset'.])
fi

AC_CHECK_FUNCS([strtoll strtoq], [break])
AC_CHECK_FUNCS([strtoull strtouq], [break])

# Check for one of atexit() or on_exit()
AC_CHECK_FUNCS(atexit, [],
               [AC_CHECK_FUNCS(on_exit, [],
               [AC_MSG_ERROR([neither atexit() nor on_exit() found])])])

AC_FUNC_FSEEKO


# This test makes sure that run tests work at all.  Sometimes a shared
# library is found by the linker, but the runtime linker can't find it.
# This check should come after all modifications of compiler or linker
# variables, and before any other run tests.
AC_MSG_CHECKING([test program])
AC_TRY_RUN([int main() { return 0; }],
[AC_MSG_RESULT(ok)],
[AC_MSG_RESULT(failed)
AC_MSG_ERROR([[
*** Could not execute a simple test program.  This may be a problem
*** related to locating shared libraries.  Check the file 'config.log'
*** for the exact reason.]])],
[AC_MSG_RESULT([cross-compiling])])


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.

PGAC_TYPE_64BIT_INT([long int])

if test x"$HAVE_LONG_INT_64" = x"no" ; then
  PGAC_TYPE_64BIT_INT([long long int])
fi


dnl If we need to use "long long int", figure out whether nnnLL notation works.

if test x"$HAVE_LONG_LONG_INT_64" = xyes ; then
  AC_TRY_COMPILE([
#define INT64CONST(x)  x##LL
long long int foo = INT64CONST(0x1234567890123456);
],
	[],
	[AC_DEFINE(HAVE_LL_CONSTANTS, 1, [Define to 1 if constants of type 'long long int' should have the suffix LL.])],
	[])
fi


# If we found "long int" is 64 bits, assume snprintf handles it.  If
# we found we need to use "long long int", better check.  We cope with
# snprintfs that use either %lld, %qd, or %I64d as the format.  If
# neither works, fall back to our own snprintf emulation (which we
# know uses %lld).

if test "$HAVE_LONG_LONG_INT_64" = yes ; then
  if test $pgac_need_repl_snprintf = no; then
    PGAC_FUNC_SNPRINTF_LONG_LONG_INT_FORMAT
    if test "$LONG_LONG_INT_FORMAT" = ""; then
      # Force usage of our own snprintf, since system snprintf is broken
      pgac_need_repl_snprintf=yes
      LONG_LONG_INT_FORMAT='%lld'
    fi
  else
    # Here if we previously decided we needed to use our own snprintf
    LONG_LONG_INT_FORMAT='%lld'
  fi