configure.in

dnl Process this file with autoconf to produce a configure script.
dnl $PostgreSQL: pgsql/configure.in,v 1.536 2007/11/13 00:13:19 tgl 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

AC_INIT([PostgreSQL], [8.3beta2], [pgsql-bugs@postgresql.org])

AC_PREREQ(2.59)
AC_COPYRIGHT([Copyright (c) 1996-2007, 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 as a string])

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 ;;
    bsdi*) template=bsdi ;;
  cygwin*) template=cygwin ;;
  darwin*) template=darwin ;;
    dgux*) template=dgux ;;
 freebsd*) template=freebsd ;;
    hpux*) template=hpux ;;
    irix*) template=irix ;;
 linux*|gnu*|k*bsd*-gnu)
           template=linux ;;
   mingw*) template=win32 ;;
  netbsd*) template=netbsd ;;
nextstep*) template=nextstep ;;
 openbsd*) template=openbsd ;;
     osf*) template=osf ;;
     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)

# Initialize default assumption that we do not need separate assembly code
# for TAS (test-and-set).  This can be overridden by the template file
# when it's executed.
need_tas=no
tas_file=dummy.s



##
## Command line options
##

#
# Installation directory for documentation
#
PGAC_ARG(with, docdir, [  --with-docdir=DIR       install the documentation in DIR [[PREFIX/doc]]
  --without-docdir        do not install the documentation],
         [AC_MSG_ERROR([option --with-docdir requires an argument])],
         [docdir=],
         [docdir=$withval],
         [docdir='${prefix}/doc'])
AC_SUBST(docdir)


#
# 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])


#
# 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, ${default_port},
[Define to the default TCP port number on which the server listens and
to which clients will try to connect.  This can be overridden at run-time,
but it's convenient if your clients have the right default compiled in.
(--with-pgport=PORTNUM)])
AC_DEFINE_UNQUOTED(DEF_PGPORT_STR, "${default_port}",
                   [Define to the default TCP port number as a 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)

#
# Spinlocks
#
PGAC_ARG_BOOL(enable, spinlocks, yes,
              [  --disable-spinlocks     do not use spinlocks])

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

#
# --enable-profiling enables gcc profiling
#
PGAC_ARG_BOOL(enable, profiling, no,
              [  --enable-profiling      build with profiling enabled ])
AC_SUBST(enable_profiling)

#
# DTrace
#
PGAC_ARG_BOOL(enable, dtrace, no,
              [  --enable-dtrace         build with DTrace support],
[AC_DEFINE([ENABLE_DTRACE], 1, 
           [Define to 1 to enable DTrace support. (--enable-dtrace)])
AC_CHECK_PROGS(DTRACE, dtrace)
if test -z "$DTRACE"; then
  AC_MSG_ERROR([dtrace not found])
fi
AC_SUBST(DTRACEFLAGS)])
AC_SUBST(enable_dtrace)

#
# 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])

# Check if it's Intel's compiler, which (usually) pretends to be gcc,
# but has idiosyncrasies of its own.  We assume icc will define
# __INTEL_COMPILER regardless of CFLAGS.
AC_TRY_COMPILE([], [@%:@ifndef __INTEL_COMPILER
choke me
@%:@endif], [ICC=[yes]], [ICC=[no]])

unset CFLAGS

#
# Read the template
#
. "$srcdir/src/template/$template" || exit

# CFLAGS are selected so:
# If the user specifies something in the environment, that is used.
# else:  If the template file set something, that is used.
# else:  If the compiler is GCC, then we use -O2.
# else:  If the compiler is something else, then we use -0.

if test "$ac_env_CFLAGS_set" = set; then
  CFLAGS=$ac_env_CFLAGS_value
elif test "${CFLAGS+set}" = set; then
  : # (keep what template set)
elif test "$GCC" = yes; then
  CFLAGS="-O2"
else
  # if the user selected debug mode, don't use -O
  if test "$enable_debug" != yes; then
    CFLAGS="-O"
  fi
fi

# Some versions of GCC support some additional useful warning flags.
# Check whether they are supported, and add them to CFLAGS if so.
# ICC pretends to be GCC but it's lying; it doesn't support these options.

if test "$GCC" = yes -a "$ICC" = no; then
  CFLAGS="$CFLAGS -Wall -Wmissing-prototypes -Wpointer-arith -Winline"
  # These work in some but not all gcc versions
  PGAC_PROG_CC_CFLAGS_OPT([-Wdeclaration-after-statement])
  PGAC_PROG_CC_CFLAGS_OPT([-Wendif-labels])
  # Disable strict-aliasing rules; needed for gcc 3.3+
  PGAC_PROG_CC_CFLAGS_OPT([-fno-strict-aliasing])
elif test "$ICC" = yes; then
  # Intel's compiler has a bug/misoptimization in checking for
  # division by NAN (NaN == 0), -mp1 fixes it, so add it to the CFLAGS.
  PGAC_PROG_CC_CFLAGS_OPT([-mp1])
  # Make sure strict aliasing is off (though this is said to be the default)
  PGAC_PROG_CC_CFLAGS_OPT([-fno-strict-aliasing])
elif test x"${CC}" = x"xlc"; then
  # AIX xlc has to have strict aliasing turned off too
  PGAC_PROG_CC_CFLAGS_OPT([-qnoansialias])
fi

# supply -g if --enable-debug
if test "$enable_debug" = yes && test "$ac_cv_prog_cc_g" = yes; then
  CFLAGS="$CFLAGS -g"
fi

# enable profiling if --enable-profiling
if test "$enable_profiling" = yes && test "$ac_cv_prog_cc_g" = yes; then
  if test "$GCC" = yes; then
    AC_DEFINE([PROFILE_PID_DIR], 1, 
           [Define to 1 to allow profiling output to be saved separately for each process.])
    CFLAGS="$CFLAGS -pg $PLATFORM_PROFILE_FLAGS"
  else
    AC_MSG_ERROR([--enable-profiling is supported only when using GCC])
  fi
fi

AC_MSG_NOTICE([using CFLAGS=$CFLAGS])

# We already have this in Makefile.win32, but configure needs it too
if test "$PORTNAME" = "win32"; then
  CPPFLAGS="$CPPFLAGS -I$srcdir/src/include/port/win32 -DEXEC_BACKEND"
fi

# 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 -ffast-math
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])


#
# Set up TAS assembly code if needed; the template file has now had its
# chance to request this.
#
AC_CONFIG_LINKS([src/backend/port/tas.s:src/backend/port/tas/${tas_file}])

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


#
# 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}${PATH_SEPARATOR}"
# 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}${PATH_SEPARATOR}"
# 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

#
# Enable thread-safe client libraries
#
AC_MSG_CHECKING([allow thread-safe client libraries])
if test "$PORTNAME" != "win32"; then
PGAC_ARG_BOOL(enable, thread-safety, no, [  --enable-thread-safety  make client libraries thread-safe])
else
# Win32 should always use threads
PGAC_ARG_BOOL(enable, thread-safety, yes, [  --enable-thread-safety  make client libraries thread-safe])
fi

PGAC_ARG_BOOL(enable, thread-safety-force, no, [  --enable-thread-safety-force  force thread-safety despite thread test failure])
if test "$enable_thread_safety" = yes -o \
        "$enable_thread_safety_force" = yes; then
  enable_thread_safety="yes"	# for 'force'
  AC_DEFINE([ENABLE_THREAD_SAFETY], 1,
          [Define to 1 to build client libraries as thread-safe code. (--enable-thread-safety)])
fi
AC_MSG_RESULT([$enable_thread_safety])
AC_SUBST(enable_thread_safety)

#
# Optionally build Tcl modules (PL/Tcl)
#
AC_MSG_CHECKING([whether to build with Tcl])
PGAC_ARG_BOOL(with, tcl, no, [  --with-tcl              build Tcl modules (PL/Tcl)])
AC_MSG_RESULT([$with_tcl])
AC_SUBST([with_tcl])

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

#
# GSSAPI
#
AC_MSG_CHECKING([whether to build with GSSAPI support])
PGAC_ARG_BOOL(with, gssapi, no, [  --with-gssapi           build with GSSAPI support],
[
  AC_DEFINE(ENABLE_GSS, 1, [Define to build with GSSAPI support. (--with-gssapi)])
  krb_srvtab="FILE:\$(sysconfdir)/krb5.keytab"
])
AC_MSG_RESULT([$with_gssapi])
AC_SUBST(with_gssapi)

#
# Kerberos 5
#
AC_MSG_CHECKING([whether to build with Kerberos 5 support])
PGAC_ARG_BOOL(with, krb5, no, [  --with-krb5             build with Kerberos 5 support],
[
  AC_DEFINE(KRB5, 1, [Define to build with Kerberos 5 support. (--with-krb5)])
  krb_srvtab="FILE:\$(sysconfdir)/krb5.keytab"
])
AC_MSG_RESULT([$with_krb5])
AC_SUBST(with_krb5)


AC_SUBST(krb_srvtab)


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


#
# LDAP
#
AC_MSG_CHECKING([whether to build with LDAP support])
PGAC_ARG_BOOL(with, ldap, no,
              [  --with-ldap             build with LDAP support],
              [AC_DEFINE([USE_LDAP], 1, [Define to 1 to build with LDAP support. (--with-ldap)])])
AC_MSG_RESULT([$with_ldap])
AC_SUBST(with_ldap)


#
# Bonjour
#
AC_MSG_CHECKING([whether to build with Bonjour support])
PGAC_ARG_BOOL(with, bonjour, no,
              [  --with-bonjour          build with Bonjour support],
              [AC_DEFINE([USE_BONJOUR], 1, [Define to 1 to build with Bonjour support. (--with-bonjour)])])
AC_MSG_RESULT([$with_bonjour])
AC_SUBST(with_bonjour)


#
# OpenSSL
#
AC_MSG_CHECKING([whether to build with OpenSSL support])
PGAC_ARG_BOOL(with, openssl, no, [  --with-openssl          build with OpenSSL support],
              [AC_DEFINE([USE_SSL], 1, [Define to build with (Open)SSL support. (--with-openssl)])])
AC_MSG_RESULT([$with_openssl])
AC_SUBST(with_openssl)


#
# Readline
#
PGAC_ARG_BOOL(with, readline, yes,
              [  --without-readline      do not use GNU Readline nor BSD Libedit for editing])
# readline on MinGW has problems with backslashes in psql and other bugs.
# This is particularly a problem with non-US code pages.
# Therefore disable its use until we understand the cause. 2004-07-20
if test "$PORTNAME" = "win32"; then
  if test "$with_readline" = yes; then
    AC_MSG_WARN([*** Readline does not work on MinGW --- disabling])
    with_readline=no
  fi
fi


#
# Prefer libedit
#
PGAC_ARG_BOOL(with, libedit-preferred, no,
              [  --with-libedit-preferred  prefer BSD Libedit over GNU Readline])


#
# OSSP UUID library
#
PGAC_ARG_BOOL(with, ossp-uuid, no, [  --with-ossp-uuid        use OSSP UUID library when building /contrib/uuid-ossp ])
AC_SUBST(with_ossp_uuid)


#
# XML
#
PGAC_ARG_BOOL(with, libxml, no, [  --with-libxml           build with XML support],
              [AC_DEFINE([USE_LIBXML], 1, [Define to 1 to build with XML support. (--with-libxml)])])

if test "$with_libxml" = yes ; then
  AC_CHECK_PROGS(XML2_CONFIG, xml2-config)
  if test -n "$XML2_CONFIG"; then
    for pgac_option in `$XML2_CONFIG --cflags`; do
      case $pgac_option in
        -I*|-D*) CPPFLAGS="$CPPFLAGS $pgac_option";;
      esac
    done
    for pgac_option in `$XML2_CONFIG --libs`; do
      case $pgac_option in
        -L*) LDFLAGS="$LDFLAGS $pgac_option";;
      esac
    done
  fi
fi

AC_SUBST(with_libxml)

#
# XSLT
#
PGAC_ARG_BOOL(with, libxslt, no, [  --with-libxslt          use XSLT support when building /contrib/xml2],
              [AC_DEFINE([USE_LIBXSLT], 1, [Define to 1 to use XSLT support when building /contrib/xml2. (--with-libxslt)])])


AC_SUBST(with_libxslt)

#
# tzdata
#
PGAC_ARG_REQ(with, system-tzdata,
             [  --with-system-tzdata=DIR  use system time zone data in DIR])
AC_SUBST(with_system_tzdata)

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

#
# Elf
#

# 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)

#
# Assignments
#

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

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

AC_ARG_VAR(LDFLAGS_SL)

PGAC_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
PGAC_CHECK_STRIP

AC_PATH_PROG(TAR, tar)
AC_PROG_LN_S
AC_PROG_AWK

PGAC_PATH_YACC
PGAC_PATH_FLEX

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_EMBED_SETUP
fi

# Supply a numeric version string for use by 3rd party add-ons
# awk -F is a regex on some platforms, and not on others, so make "." a tab
[PG_VERSION_NUM="`echo "$PACKAGE_VERSION" | sed 's/[A-Za-z].*$//' |
tr '.' '	' |
$AWK '{printf "%d%02d%02d", $1, $2, (NF >= 3) ? $3 : 0}'`"]
AC_DEFINE_UNQUOTED(PG_VERSION_NUM, $PG_VERSION_NUM, [PostgreSQL version as a number])

##
## Libraries
##
## Most libraries are included only if they demonstrably provide a function
## we need, but libm is an exception: always include it, because there are
## too many compilers that play cute optimization games that will break
## probes for standard functions such as pow().
##

AC_CHECK_LIB(m, main)
AC_SEARCH_LIBS(setproctitle, util)
AC_SEARCH_LIBS(dlopen, dl)
AC_SEARCH_LIBS(socket, [socket wsock32])
AC_SEARCH_LIBS(shl_load, dld)
# We only use libld in port/dynloader/aix.c
case $host_os in
     aix*)
	AC_SEARCH_LIBS(ldopen, ld)
	;;
esac
AC_SEARCH_LIBS(getopt_long, [getopt gnugetopt])
AC_SEARCH_LIBS(crypt, crypt)
# Solaris:
AC_SEARCH_LIBS(fdatasync, [rt posix4])
# Cygwin:
AC_SEARCH_LIBS(shmget, cygipc)

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 "$enable_spinlocks" = yes; then
  AC_DEFINE(HAVE_SPINLOCKS, 1, [Define to 1 if you have spinlocks.])
else
  AC_MSG_WARN([
*** Not using spinlocks will cause poor performance.])
fi

if test "$with_gssapi" = yes ; then
  if test "$PORTNAME" != "win32"; then
    AC_SEARCH_LIBS(gss_init_sec_context, [gssapi_krb5 gss 'gssapi -lkrb5 -lcrypto'], [],
		 		  [AC_MSG_ERROR([could not find function 'gss_init_sec_context' required for GSSAPI])])
  else
    LIBS="$LIBS -lgssapi32"
  fi
fi

if test "$with_krb5" = yes ; then
  if test "$PORTNAME" != "win32"; then
     AC_SEARCH_LIBS(com_err, [krb5 'krb5 -lcrypto -ldes -lasn1 -lroken' com_err], [],
                    [AC_MSG_ERROR([could not find function 'com_err' required for Kerberos 5])])
     AC_SEARCH_LIBS(krb5_sendauth, [krb5 'krb5 -lcrypto -ldes -lasn1 -lroken'], [],
                    [AC_MSG_ERROR([could not find function 'krb5_sendauth' required for Kerberos 5])])
  else
     AC_SEARCH_LIBS(com_err, 'comerr32 -lkrb5_32', [],
                    [AC_MSG_ERROR([could not find function 'com_err' required for Kerberos 5])])
  fi
fi

if test "$with_openssl" = yes ; then
  dnl Order matters!
  if test "$PORTNAME" != "win32"; then
     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])])
  else
     AC_CHECK_LIB(eay32, CRYPTO_new_ex_data, [], [AC_MSG_ERROR([library 'eay32' is required for OpenSSL])])
     AC_CHECK_LIB(ssleay32,    SSL_library_init, [], [AC_MSG_ERROR([library 'ssleay32' is required for OpenSSL])])
  fi
fi

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

if test "$with_libxml" = yes ; then
  AC_CHECK_LIB(xml2, xmlSaveToBuffer, [], [AC_MSG_ERROR([library 'xml2' (version >= 2.6.23) is required for XML support])])
fi

if test "$with_libxslt" = yes ; then
  AC_CHECK_LIB(xslt, xsltLibxmlVersion, [], [AC_MSG_ERROR([library 'xslt' is required for XSLT support])])
fi

# for contrib/uuid-ossp
if test "$with_ossp_uuid" = yes ; then
  AC_CHECK_LIB(ossp-uuid, uuid_export,
    [OSSP_UUID_LIBS="-lossp-uuid"],
    [AC_CHECK_LIB(uuid, uuid_export,
      [OSSP_UUID_LIBS="-luuid"],
      [AC_MSG_ERROR([library 'ossp-uuid' or 'uuid' is required for OSSP-UUID])])])
fi
AC_SUBST(OSSP_UUID_LIBS)


##
## Header files
##

dnl sys/socket.h is required by AC_FUNC_ACCEPT_ARGTYPES
AC_CHECK_HEADERS([crypt.h dld.h fp_class.h getopt.h ieeefp.h langinfo.h poll.h pwd.h sys/ipc.h sys/poll.h sys/pstat.h sys/resource.h sys/select.h sys/sem.h sys/socket.h sys/shm.h sys/tas.h sys/time.h sys/un.h termios.h utime.h wchar.h wctype.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 expr x"$pgac_cv_check_readline" : 'x-lreadline' >/dev/null ; then
  AC_CHECK_HEADERS(readline/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(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 expr x"$pgac_cv_check_readline" : 'x-ledit' >/dev/null ; then
# Some installations of libedit usurp /usr/include/readline/, which seems
# bad practice, since in combined installations readline will have its headers
# there.  We might have to resort to AC_EGREP checks to make sure we found
# the proper header...
  AC_CHECK_HEADERS(editline/readline.h, [],
        [AC_CHECK_HEADERS(readline.h, [],
                [AC_CHECK_HEADERS(readline/readline.h, [],
                        [AC_MSG_ERROR([readline header not found
If you have libedit 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 libedit support.])])])])
# Note: in a libedit installation, history.h is sometimes a dummy, and may
# not be there at all.  Hence, don't complain if not found.  We must check
# though, since in yet other versions it is an independent header.
  AC_CHECK_HEADERS(editline/history.h, [],
        [AC_CHECK_HEADERS(history.h, [],
                [AC_CHECK_HEADERS(readline/history.h)])])
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_gssapi" = yes ; then
  AC_CHECK_HEADERS(gssapi/gssapi.h, [],
	[AC_CHECK_HEADERS(gssapi.h, [], [AC_MSG_ERROR([gssapi.h header file is required for GSSAPI])])])
fi

if test "$with_krb5" = yes ; then
  AC_CHECK_HEADER(krb5.h, [], [AC_MSG_ERROR([header file <krb5.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])])
  AC_CHECK_FUNCS([ERR_set_mark])
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

if test "$with_libxml" = yes ; then
  AC_CHECK_HEADER(libxml/parser.h, [], [AC_MSG_ERROR([header file <libxml/parser.h> is required for XML support])])
fi

if test "$with_libxslt" = yes ; then
  AC_CHECK_HEADER(libxslt/xslt.h, [], [AC_MSG_ERROR([header file <libxslt/xslt.h> is required for XSLT support])])
fi

if test "$with_ldap" = yes ; then
  if test "$PORTNAME" != "win32"; then
     AC_CHECK_HEADERS(ldap.h, [],
                      [AC_MSG_ERROR([header file <ldap.h> is required for LDAP])])
  else
     AC_CHECK_HEADERS(winldap.h, [],
                      [AC_MSG_ERROR([header file <winldap.h> is required for LDAP])],
                      [AC_INCLUDES_DEFAULT
#include <windows.h>
                      ])
  fi
fi

if test "$with_bonjour" = yes ; then
  AC_CHECK_HEADER(DNSServiceDiscovery/DNSServiceDiscovery.h, [], [AC_MSG_ERROR([header file <DNSServiceDiscovery/DNSServiceDiscovery.h> is required for Bonjour])])
fi

# for contrib/uuid-ossp
if test "$with_ossp_uuid" = yes ; then
  AC_CHECK_HEADERS(ossp/uuid.h, [], [
    AC_CHECK_HEADERS(uuid.h, [],
      [AC_MSG_ERROR([header file <ossp/uuid.h> or <uuid.h> is required for OSSP-UUID])])])
fi


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

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

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

AC_CHECK_TYPES([struct option], [], [],
[#ifdef HAVE_GETOPT_H
#include <getopt.h>
#endif])

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>])

# Win32 requires headers to be loaded for __stdcall, so can't use
# AC_CHECK_FUNCS here.
  AC_MSG_CHECKING(for krb5_free_unparsed_name)
  AC_TRY_LINK([#include <krb5.h>],
              [krb5_free_unparsed_name(NULL,NULL);],
              [AC_DEFINE(HAVE_KRB5_FREE_UNPARSED_NAME, 1, [Define to 1 if you have krb5_free_unparsed_name]) 
AC_MSG_RESULT(yes)],
              [AC_MSG_RESULT(no)])
fi


##
## Functions, global variables
##

PGAC_VAR_INT_TIMEZONE
AC_FUNC_ACCEPT_ARGTYPES
PGAC_FUNC_GETTIMEOFDAY_1ARG

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

AC_CHECK_DECLS(fdatasync, [], [], [#include <unistd.h>])
AC_CHECK_DECLS(posix_fadvise, [], [], [#include <fcntl.h>])
AC_CHECK_DECLS([strlcat, strlcpy])
# This is probably only present on Darwin, but may as well check always
AC_CHECK_DECLS(F_FULLFSYNC, [], [], [#include <fcntl.h>])

HAVE_IPV6=no
AC_CHECK_TYPE([struct sockaddr_in6],