configure.in

dnl Process this file with autoconf to produce a configure script.

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 The GNU folks apparently haven't heard that some people don't use
dnl Texinfo. Use this sorcery to use "docdir" instead of "infodir".
define([info], [doc])
define([infodir], [docdir])
AC_INIT(src/backend/access/common/heaptuple.c)
undefine([infodir])
undefine([info])

AC_PREFIX_DEFAULT(/usr/local/pgsql)
AC_CONFIG_HEADER(src/include/config.h)

AC_PREREQ(2.13)
AC_CONFIG_AUX_DIR(config)

VERSION='7.1devel'
AC_SUBST(VERSION)
AC_DEFINE_UNQUOTED(PG_VERSION, "$VERSION")

AC_CANONICAL_HOST

template=
AC_MSG_CHECKING([which template to use])

# check if --with-template was given
if test x"${with_template+set}" = xset ; then
  case $with_template in
    yes|no) AC_MSG_ERROR([You must supply an argument to the --with-template option.]);;
    list)   echo; ls "$srcdir/src/template"; exit;;
    *)      if test -f "$srcdir/src/template/$with_template" ; then
              template=$with_template
            else
              AC_MSG_ERROR([\`$with_template' is not a valid template name. Use \`list' for a list.])
            fi;;
  esac

else # --with-template not given

case $host_os in
     aix*) template=aix ;;
    bsdi*) template=bsdi ;;
  cygwin*) template=win ;;
    dgux*) template=dgux ;;
 freebsd*) template=freebsd ;;
    hpux*) template=hpux ;;
    irix*) template=irix5 ;;
   linux*) template=linux ;;
  netbsd*) template=netbsd ;;
nextstep*) template=nextstep ;;
 openbsd*) template=openbsd ;;
     osf*) template=osf ;;
     qnx*) template=qnx4 ;;
     sco*) template=sco ;;
 solaris*)
	case $host_cpu in
	  sparc) template=solaris_sparc ;;
	   i?86) template=solaris_i386 ;;
	esac ;;
   sunos*) template=sunos4 ;;
 sysv4.2*)
        case $host_vendor in
          univel) template=univel ;;
        esac ;;
   sysv4*) template=svr4 ;;
 sysv5uw*) 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

fi # --with-template not given

AC_MSG_RESULT([$template])

PORTNAME=$template
CPU=$host_cpu
AC_SUBST(PORTNAME)
AC_SUBST(CPU)

AC_LINK_FILES([src/backend/port/dynloader/${template}.c], [src/backend/port/dynloader.c])
AC_LINK_FILES([src/backend/port/dynloader/${template}.h], [src/include/dynloader.h])
AC_LINK_FILES([src/include/port/${template}.h], [src/include/os.h])
AC_LINK_FILES([src/makefiles/Makefile.${template}], [src/Makefile.port])

# Pick right test-and-set (TAS) code. Most platforms have inline
# assembler code in their port include file, so we just use a dummy
# file here.
tas_file=dummy.s
need_tas=no
case $template in
  hpux)           need_tas=yes; tas_file=hpux.s ;;
  solaris_sparc)  need_tas=yes; tas_file=solaris_sparc.s ;;
  solaris_i386)   need_tas=yes; tas_file=solaris_i386.s ;;
esac

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



##
## Command line options
##


#
# Add non-standard directories to the include path
#
AC_ARG_WITH(includes, [  --with-includes=DIRS    look for additional header files in DIRS],
[
  case $withval in
    yes | no) AC_MSG_ERROR([You must supply an argument to the --with-includes option.]);;
  esac
])


#
# Add non-standard directories to the library search path
#
AC_ARG_WITH(libraries, [  --with-libraries=DIRS   look for additional libraries in DIRS],
[
  case $withval in
    yes | no) AC_MSG_ERROR([You must supply an argument to the --with-libraries option.]);;
  esac
  LIBRARY_DIRS=$withval
])

AC_ARG_WITH(libs,      [  --with-libs=DIRS        alternative spelling of --with-libraries],
[
  case $withval in
    yes | no) AC_MSG_ERROR([You must supply an argument to the --with-libs option.]);;
  esac
  LIBRARY_DIRS=$withval
])


#
# Locale (--enable-locale)
#
AC_MSG_CHECKING([whether to build with locale support])
AC_ARG_ENABLE(locale, [  --enable-locale         enable locale support],
[if test x"$enable_locale" != x"no" ; then
  enable_locale=yes
  AC_DEFINE(USE_LOCALE, 1, [Set to 1 if you want LOCALE support (--enable-locale)])
fi],
[enable_locale=no])
AC_MSG_RESULT([$enable_locale])


#
# Cyrillic recode (--enable-recode)
#
AC_MSG_CHECKING([whether to build with Cyrillic recode support])
AC_ARG_ENABLE(recode, [  --enable-recode         enable cyrillic recode support],
[if test x"$enable_recode" != x"no" ; then
  enable_recode=yes
  AC_DEFINE(CYR_RECODE, 1, [Set to 1 if you want cyrillic recode support (--enable-recode)])
fi],
[enable_recode=no])
AC_MSG_RESULT([$enable_recode])


#
# Multibyte support
#
MULTIBYTE=
AC_MSG_CHECKING([whether to build with multibyte character support])
AC_ARG_ENABLE(multibyte, [  --enable-multibyte      enable multibyte character support],
[
  case $enableval in
    no)         enable_multibyte=no;;
    yes)        enable_multibyte=yes; MULTIBYTE=SQL_ASCII;;
    SQL_ASCII|EUC_JP|EUC_CN|EUC_KR|EUC_TW|UNICODE|MULE_INTERNAL|LATIN1|LATIN2|LATIN3|LATIN4|LATIN5|KOI8|WIN|ALT)
                enable_multibyte=yes; MULTIBYTE=$enableval;;
    *)          AC_MSG_ERROR(
[argument to --enable-multibyte must be one of:
  SQL_ASCII, EUC_JP, EUC_CN, EUC_KR, EUC_TW,
  UNICODE, MULE_INTERNAL,
  LATIN1, LATIN2, LATIN3, LATIN4, LATIN5,
  KOI8, WIN, ALT
Or do not specify an argument to the option to use the default.]) ;;
  esac
],
[enable_multibyte=no])

AC_SUBST(MULTIBYTE)

if test "$enable_multibyte" = yes ; then
  AC_DEFINE(MULTIBYTE, 1, [Set to 1 if you want to use multibyte characters (--enable-multibyte)])
  AC_MSG_RESULT([yes, default $MULTIBYTE])
else
  AC_MSG_RESULT(no)
fi


#
# Default port number (--with-pgport), default 5432
#
AC_MSG_CHECKING([for default port number])
AC_ARG_WITH(pgport, [  --with-pgport=PORTNUM   change default port number [5432]],
[case $withval in
  yes|no)       AC_MSG_ERROR([You must supply an argument to the --with-pgport option]);;
  *)            default_port=$withval;;
esac
],
[default_port=5432])
# Need both of these because backend wants an integer and frontend a string
AC_DEFINE_UNQUOTED(DEF_PGPORT, ${default_port})
AC_DEFINE_UNQUOTED(DEF_PGPORT_STR, "${default_port}")
AC_MSG_RESULT([$default_port])


#
# Maximum number of allowed connections (--with-maxbackends), default 32
#
AC_MSG_CHECKING([for default soft limit on number of connections])
AC_ARG_WITH(maxbackends, [  --with-maxbackends=N    set default maximum number of connections [32]],
[case $withval in
  yes|no)       AC_MSG_ERROR([You must supply an argument to the --with-maxbackends option]);;
esac],
[with_maxbackends=32])
AC_MSG_RESULT([$with_maxbackends])
AC_DEFINE_UNQUOTED(DEF_MAXBACKENDS, [$with_maxbackends], [The default soft limit on the number of concurrent connections, i.e., the default for the postmaster -N switch (--with-maxbackends)])


#
# 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.
if test "${with_CC+set}" = set; then
  case $with_CC in
    yes | no)   AC_MSG_ERROR([You must supply an argument to the --with-CC option.]);;
    *)          CC=$with_CC;;
  esac
fi

# On AIX, default compiler to xlc.
if test "$template" = aix && test -z "$CC" ; then CC=xlc; fi

AC_PROG_CC
# Read the template
. "$srcdir/src/template/$template" || exit
echo "using CFLAGS=$CFLAGS"
# Check if the compiler still works with the template settings
AC_PROG_CC_WORKS
AC_PROG_CPP
AC_PROG_GCC_TRADITIONAL

AC_SUBST(GCC)
AC_SUBST(AROPT)
AC_SUBST(SHARED_LIB)
AC_SUBST(DLSUFFIX)
AC_SUBST(DL_LIB)

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


#
# Automatic dependency tracking
#
AC_ARG_ENABLE(depend, [  --enable-depend         turn on automatic dependency tracking],
[
  if test x"$enableval" = x"yes" ; then
    autodepend=yes
  fi
])
AC_SUBST(autodepend)


# --enable-debug adds -g to compiler flags
# --disable-debug will forcefully remove it
AC_MSG_CHECKING(setting debug compiler flag)
AC_ARG_ENABLE(debug, [  --enable-debug          build with debugging symbols (-g)],
[
  case $enableval in
    yes)  CFLAGS="$CFLAGS -g"
          AC_MSG_RESULT(yes)
          ;;
    *)    CFLAGS=`echo "$CFLAGS" | sed -e 's/ -g/ /g' -e 's/^-g//'`
          AC_MSG_RESULT(no)
          ;;
  esac
],
[AC_MSG_RESULT(using default)])


#
# Include directories
#
ac_save_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=':'
# LIBRARY_DIRS comes from command line, SRCH_LIB from template file.
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 $dir does not exist.])
  fi
done
IFS=$ac_save_IFS



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) ]
)
AC_SUBST(USE_TCL)
AC_SUBST(USE_TK)


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

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

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

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


dnl
dnl Optionally build Perl modules (Pg.pm and PL/Perl)
dnl
AC_MSG_CHECKING(whether to build Perl modules)
AC_ARG_WITH(perl, [  --with-perl             build Perl interface and plperl],
[if test x"${withval}" = x"yes" ; then
  AC_MSG_RESULT(yes)
else
  AC_MSG_RESULT(no)
fi],
[AC_MSG_RESULT(no)])
AC_SUBST(with_perl)


dnl
dnl Optionally build Python interface module
dnl
AC_MSG_CHECKING(whether to build Python modules)
AC_ARG_WITH(python, [  --with-python           build Python interface module],
[if test x"${withval}" = x"yes" ; then
  AC_MSG_RESULT(yes)
  PGAC_PROG_PYTHON
  PGAC_PATH_PYTHONDIR
else
  AC_MSG_RESULT(no)
fi],
[AC_MSG_RESULT(no)])
AC_SUBST(with_python)


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_ARG_WITH(krb4, [  --with-krb4[=DIR]       use Kerberos 4 [/usr/athena]],
[if test x"$withval" != x"no"; then
  if test x"$withval" != x"yes"; then
    krb4_prefix=$withval
  else
    krb4_prefix=/usr/athena
  fi
  with_krb4=yes
else
  with_krb4=no
fi],
[with_krb4=no])

AC_SUBST(with_krb4)
if test "$with_krb4" = yes ; then
  AC_MSG_RESULT([building with Kerberos 4 support])
  AC_DEFINE(KRB4, [], [Define if you are building with Kerberos 4 support.])

  if test -d "$krb4_prefix"; then
    if test -d "$krb4_prefix/include"; then
      INCLUDES="$INCLUDES -I$krb4_prefix/include"
    fi
    if test -d "$krb4_prefix/lib"; then
      krb_libdir="-L$krb4_prefix/lib"
      LIBS="$krb_libdir $LIBS"
    fi
  fi
  dnl Test for these libraries is below
  KRB_LIBS="$krb_libdir -lkrb -ldes"

  krb_srvtab='/etc/srvtab'
fi


#
# Kerberos 5
#
AC_ARG_WITH(krb5, [  --with-krb5[=DIR]       use Kerberos 5 [/usr/athena]],
[if test x"$withval" != x"no"; then
  if test x"$withval" != x"yes"; then
    krb5_prefix=$withval
  else
    krb5_prefix=/usr/athena
  fi
  with_krb5=yes
else
  with_krb5=no
fi],
[with_krb5=no])

AC_SUBST(with_krb5)
if test "$with_krb5" = yes ; then
  AC_MSG_RESULT([building with Kerberos 5 support])
  AC_DEFINE(KRB5,, [Define if you are building with Kerberos 5 support.])

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

  dnl Test for these libraries is below
  KRB_LIBS="$krb_libdir -lkrb5 -lcrypto -lcom_err"

  krb_srvtab='FILE:$(sysconfdir)/krb5.keytab'
fi


# 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)
dnl Necessary for special libpq link
AC_SUBST(KRB_LIBS)


#
# Kerberos configuration parameters
#
AC_ARG_WITH(krb-srvnam, [  --with-krb-srvnam=NAME  name of the Postgres service principal in Kerberos],
[if test x"$withval" = x"yes"; then
  AC_MSG_ERROR([argument required for --with-krb-srvnam])
else
  krb_srvnam=$withval
fi],
[krb_srvnam="postgres"])
AC_DEFINE_UNQUOTED(PG_KRB_SRVNAM, ["$krb_srvnam"], [The name of the Postgres service principal])



#
# OpenSSL
#
AC_ARG_WITH(openssl, [  --with-openssl[=DIR]    build with OpenSSL support [/usr/local/ssl]],
[if test x"$withval" != x"no" ; then
  if test x"$withval" != x"yes" ; then
    openssl_prefix=$withval
  else
    openssl_prefix=/usr/local/ssl
  fi
  with_openssl=yes
else
  with_openssl=no
fi],
[with_openssl=no])

AC_SUBST(with_openssl)
if test "$with_openssl" = yes ; then
  AC_MSG_RESULT([building with OpenSSL support])
  AC_DEFINE([USE_SSL], [], [Define to build with (Open)SSL support])

  if test -d "${openssl_prefix}/include" ; then
    INCLUDES="$INCLUDES -I${openssl_prefix}/include"
  fi
  if test -d "${openssl_prefix}/lib" ; then
    openssl_libdir="${openssl_prefix}/lib"
    LIBS="$LIBS -L${openssl_prefix}/lib"
  fi
fi


# OpenSSL and Kerberos 5 both have a `crypto' library, so if you want to
# use both of them you'll have to figure it out yourself.
if test "$with_openssl" = yes && test "$with_krb5" = yes ; then
  AC_MSG_ERROR([OpenSSL and Kerberos 5 support cannot be combined])
fi


dnl
dnl Optionally enable the building of the ODBC driver
dnl
 
dnl Old option name
if test "x${with_odbc+set}" = xset && test "x${enable_odbc+set}" != xset; then
  enable_odbc=$with_odbc
fi
 
AC_MSG_CHECKING(whether to build the ODBC driver)
AC_ARG_ENABLE(odbc, [  --enable-odbc           build the ODBC driver package],
[if test x"$enableval" = x"yes" ; then
  AC_MSG_RESULT(yes)
else
  AC_MSG_RESULT(no)
fi],
[AC_MSG_RESULT(no)])
AC_SUBST(enable_odbc)


dnl Allow for overriding the default location of the odbcinst.ini
dnl file which is normally ${datadir} (i.e., ${prefix}/share).
if test x"$enable_odbc" = x"yes" ; then
AC_ARG_WITH(odbcinst, [  --with-odbcinst=DIR     default directory for odbcinst.ini [sysconfdir]],
[if test x"$with_odbcinst" = x"yes" || test x"$with_odbcinst" = x"no" ; then
  AC_MSG_ERROR([You must supply an argument to the --with-odbcinst option.])
fi
odbcinst_ini_dir=$withval],
[odbcinst_ini_dir='${sysconfdir}'])
else
  odbcinst_ini_dir='${sysconfdir}'
fi
AC_SUBST(odbcinst_ini_dir)



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


# Assume system is ELF if it predefines __ELF__ as 1,
# otherwise believe host_os based default.
case $host_os in
  freebsd1*|freebsd2*) 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)



dnl
dnl Optionally build C++ code (i.e., libpq++)
dnl
AC_MSG_CHECKING([whether to build C++ modules])
AC_ARG_WITH(CXX, [  --with-CXX              build C++ modules (libpq++)],
[if test x"$withval" != x"no"; then
  if test x"$withval" != x"yes" ; then
    CXX=$withval
  fi
  with_CXX=yes
fi],
[with_CXX=no])

AC_MSG_RESULT([$with_CXX])
AC_SUBST(with_CXX)

if test $with_CXX = yes; then
  AC_PROG_CXX
  AC_PROG_CXXCPP
  PGAC_CLASS_STRING
  PGAC_CXX_NAMESPACE_STD
fi


CPPFLAGS="$CPPFLAGS $INCLUDES"
LDFLAGS="$LDFLAGS $PGSQL_LDFLAGS"

echo "using CPPFLAGS=$CPPFLAGS"
echo "using LDFLAGS=$LDFLAGS"


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

AC_PROG_INSTALL
# When Autoconf chooses install-sh as install program it tries to generate
# a relative path to it in each makefile where it subsitutes it. This clashes
# with our Makefile.global concept. This workaround helps.
case $INSTALL in
  *install-sh*) INSTALL='\${SHELL} \${top_srcdir}/config/install-sh -c';;
esac

# Fix Autoconf's brain-dead defaults for script installs.
INSTALL_SCRIPT="\${INSTALL} -m 755"

# HPUX wants shared libs to be mode 555. Add your platform's special
# needs here if necessary.
case $host_os in
    hpux*)      INSTL_SHLIB_OPTS="-m 555" ;;
    *)          INSTL_SHLIB_OPTS="-m 644" ;;
esac

INSTALL_SHLIB="\${INSTALL} $INSTL_SHLIB_OPTS"
AC_SUBST(INSTALL_SHLIB)


mkinstalldirs="\$(SHELL) \$(top_srcdir)/config/mkinstalldirs"
AC_SUBST(mkinstalldirs)


AC_PROG_AWK

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


##
## Libraries
##

AC_CHECK_LIB(sfio,     main)
AC_CHECK_LIB(ncurses,  main, [], [AC_CHECK_LIB(curses, main)])
AC_CHECK_LIB(termcap,  main)
AC_CHECK_LIB(readline, main)
AC_CHECK_LIB(readline, using_history, AC_DEFINE(HAVE_HISTORY_IN_READLINE),
    AC_CHECK_LIB(history,  main) )

if test "$PORTNAME" != "aix" -a "$PORTNAME" != "alpha"
then
	AC_CHECK_LIB(bsd,      main)
fi
AC_CHECK_LIB(util,     setproctitle)
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(gen,      main)
AC_CHECK_LIB(PW,       main)
AC_SEARCH_LIBS(crypt,  crypt)
AC_CHECK_LIB(z,        inflate)

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_CHECK_LIB(com_err, main, [], [AC_MSG_ERROR([library \`com_err' is required for Kerberos 5])])
  AC_CHECK_LIB(crypto,  main, [], [AC_MSG_ERROR([library \`crypto' is required for Kerberos 5])])
  AC_CHECK_LIB(krb5,    main, [], [AC_MSG_ERROR([library \`krb5' is 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 \`ssl' is required for OpenSSL])])
  AC_CHECK_LIB(ssl,    [SSL_library_init], [], [AC_MSG_ERROR([library \`ssl' is required for OpenSSL])])
fi


##
## Header files
##
dnl sys/socket.h and sys/types.h are required by AC_FUNC_ACCEPT_ARGTYPES
AC_CHECK_HEADERS([crypt.h dld.h endian.h fp_class.h getopt.h ieeefp.h pwd.h sys/pstat.h sys/select.h sys/socket.h sys/types.h termios.h])

AC_CHECK_HEADERS([readline/readline.h readline.h], [break])
AC_CHECK_HEADERS([readline/history.h history.h], [break])

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


##
## Types, structures, compiler characteristics
##
AC_C_CONST
AC_C_INLINE
AC_C_STRINGIZE
AC_STRUCT_TIMEZONE
PGAC_UNION_SEMUN


##
## Functions, global variables
##
PGAC_VAR_INT_TIMEZONE
AC_FUNC_ACCEPT_ARGTYPES
PGAC_FUNC_GETTIMEOFDAY_1ARG

AC_MSG_CHECKING([for fcntl(F_SETLK)])
case $host_os in
  linux*)       AC_MSG_RESULT([broken on Linux]) ;;
  *)
AC_TRY_LINK(
[#include <stdio.h>
#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)])
        ;;
esac

AC_CHECK_FUNCS([fcvt getopt_long memmove pstat setproctitle setsid sigprocmask sysconf waitpid])

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 if the PS_STRINGS thing exists.])
fi

dnl We use our snprintf.c emulation if either snprintf() or vsnprintf()
dnl is missing.  Yes, there are machines that have only one.
dnl We may also decide to use snprintf.c if snprintf() is present but does
dnl not have working "long long int" support -- see below.
SNPRINTF=''
AC_CHECK_FUNC(snprintf,
	      AC_DEFINE(HAVE_SNPRINTF),
	      SNPRINTF='snprintf.o')
AC_CHECK_FUNC(vsnprintf,
	      AC_DEFINE(HAVE_VSNPRINTF),
	      SNPRINTF='snprintf.o')
AC_SUBST(SNPRINTF)
dnl Check whether <stdio.h> declares snprintf() and vsnprintf(); if not,
dnl include/c.h will provide declarations.  Note this is a separate test
dnl from whether the functions exist in the C library --- there are systems
dnl that have the functions but don't bother to declare them :-(
dnl Note: simple-minded pattern here will do wrong thing if stdio.h
dnl declares vsnprintf() but not snprintf().  Hopefully there are no
dnl systems that are *that* brain-damaged...
AC_EGREP_HEADER(snprintf, stdio.h, AC_DEFINE(HAVE_SNPRINTF_DECL))
AC_EGREP_HEADER(vsnprintf, stdio.h, AC_DEFINE(HAVE_VSNPRINTF_DECL))

# 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)
  ISINF=
else
  ISINF='isinf.o'
  # Look for a way to implement a substitute for isinf()
  AC_CHECK_FUNCS([fpclass fp_class fp_class_d class], [break])
fi
AC_SUBST(ISINF)

AC_CHECK_FUNC(getrusage,
	      AC_DEFINE(HAVE_GETRUSAGE),
	      GETRUSAGE='getrusage.o')
AC_SUBST(GETRUSAGE)
AC_CHECK_FUNC(srandom,
	      AC_DEFINE(HAVE_SRANDOM),
	      SRANDOM='srandom.o')
AC_SUBST(SRANDOM)
AC_CHECK_FUNC(gethostname,
	      AC_DEFINE(HAVE_GETHOSTNAME),
	      GETHOSTNAME='gethostname.o')
AC_SUBST(GETHOSTNAME)
AC_CHECK_FUNC(random,
	      AC_DEFINE(HAVE_RANDOM),
	      MISSING_RANDOM='random.o')
AC_SUBST(MISSING_RANDOM)
AC_CHECK_FUNC(inet_aton,
	      AC_DEFINE(HAVE_INET_ATON),
	      INET_ATON='inet_aton.o')
AC_SUBST(INET_ATON)
AC_CHECK_FUNC(strerror,
	      AC_DEFINE(HAVE_STRERROR),
	      [STRERROR='strerror.o' STRERROR2='../../backend/port/strerror.o'])
AC_SUBST(STRERROR)
AC_SUBST(STRERROR2)
AC_CHECK_FUNC(strdup,
	      AC_DEFINE(HAVE_STRDUP),
	      STRDUP='../../utils/strdup.o')
AC_SUBST(STRDUP)
AC_CHECK_FUNC(strtol,
	      AC_DEFINE(HAVE_STRTOL),
	      STRTOL='strtol.o')
AC_SUBST(STRTOL)
AC_CHECK_FUNC(strtoul,
	      AC_DEFINE(HAVE_STRTOUL),
	      STRTOL='strtoul.o')
AC_SUBST(STRTOUL)
AC_CHECK_FUNC(strcasecmp,
	      AC_DEFINE(HAVE_STRCASECMP),
	      STRCASECMP='strcasecmp.o')
AC_SUBST(STRCASECMP)
AC_CHECK_FUNC(cbrt,
	      AC_DEFINE(HAVE_CBRT),
	      AC_CHECK_LIB(m, cbrt, AC_DEFINE(HAVE_CBRT)))

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

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

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

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


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

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

AC_ARG_ENABLE(syslog, [  --enable-syslog         enable logging to syslog],