configure.ac

      fi
      AC_CHECK_LIB([gsm], [gsm_create], AC_DEFINE_UNQUOTED([HAVE_GSM], 1,
      [Define to indicate the GSM library]), [], ${gsmlibdir})
      if test "${ac_cv_lib_gsm_gsm_create}" = "yes"; then
         if test "x${GSM_DIR}" != "x" ; then
            AC_CHECK_HEADER([${GSM_DIR}/include/gsm.h], [GSM_HEADER_FOUND=1], [GSM_HEADER_FOUND=0])
            AC_CHECK_HEADER([${GSM_DIR}/include/gsm/gsm.h], [GSM_GSM_HEADER_FOUND=1], [GSM_GSM_HEADER_FOUND=0])
         else
            AC_CHECK_HEADER([gsm.h], [GSM_HEADER_FOUND=1], [GSM_HEADER_FOUND=0])
            AC_CHECK_HEADER([gsm/gsm.h], [GSM_GSM_HEADER_FOUND=1], [GSM_GSM_HEADER_FOUND=0])
         fi
         if test "${GSM_HEADER_FOUND}" = "0" ; then
            if test "{GSM_GSM_HEADER_FOUND}" = "0" ; then
               if test "x${GSM_MANDATORY}" = "xyes" ; then
                  AC_MSG_NOTICE([***])
                  AC_MSG_NOTICE([*** It appears that you do not have the gsm development package installed.])
                  AC_MSG_NOTICE([*** Please install it to include ${GSM_DESCRIP} support, or re-run configure])
                  AC_MSG_NOTICE([*** without explicitly specifying --with-${GSM_OPTION}])
                  exit 1
               fi
            fi
         fi
         GSM_OK=0
         if test "${GSM_HEADER_FOUND}" = "1" ; then
            AC_DEFINE_UNQUOTED([HAVE_GSM_HEADER], 1, [Define to indicate that gsm.h has no prefix for its location])
            GSM_OK=1
         else
            if test "${GSM_GSM_HEADER_FOUND}" = "1" ; then
               AC_DEFINE_UNQUOTED([HAVE_GSM_GSM_HEADER], 1, [Define to indicate that gsm.h is in gsm/gsm.h])
               GSM_OK=1
            fi
         fi
         if test "${GSM_OK}" = "1" ; then
            GSM_LIB="-lgsm"
            if test "x${GSM_DIR}" != "x"; then
               GSM_LIB="${gsmlibdir} ${GSM_LIB}"
               GSM_INCLUDE="-I${GSM_DIR}/include"
            fi
            PBX_GSM=1
            GSM_INTERNAL="no"
         fi
      fi
   fi
   if test "${GSM_INTERNAL}" = "yes"; then
      PBX_GSM=1
      AC_DEFINE_UNQUOTED([HAVE_GSM_HEADER], 1, [Define to indicate that gsm.h has no prefix for its location])
   fi
fi

AST_EXT_LIB_CHECK([ICONV], [iconv], [iconv_open], [iconv.h])
# Some versions of Linux package iconv in glibc
AST_EXT_LIB_CHECK([ICONV], [c], [iconv_close], [iconv.h])

# If ical.h is NOT in the libical directory, then it is of a version insufficient for us.
AST_EXT_LIB_CHECK([ICAL], [ical], [icaltimezone_get_utc_timezone], [libical/ical.h], [${PTHREAD_LIBS}], [${PTHREAD_CFLAGS}])

AST_EXT_LIB_CHECK([IKSEMEL], [iksemel], [iks_start_sasl], [iksemel.h])

if test "${USE_IMAP_TK}" != "no"; then
	saved_cppflags="${CPPFLAGS}"
	saved_libs="${LIBS}"
	switch_to_system_on_failure="no"
	if test "${IMAP_TK_DIR}" = ""; then
		IMAP_TK_DIR=`pwd`"/../imap-2004g"
		switch_to_system_on_failure="yes"
	fi
	if test "${IMAP_TK_DIR}" != "system"; then
		AC_MSG_CHECKING(for UW IMAP Toolkit c-client library)
		if test -f "${IMAP_TK_DIR}/c-client/LDFLAGS"; then
      		imap_ldflags=`cat ${IMAP_TK_DIR}/c-client/LDFLAGS`
		fi
		imap_libs="${IMAP_TK_DIR}/c-client/c-client.a"
	  	imap_include="-I${IMAP_TK_DIR}/c-client"
      	CPPFLAGS="${CPPFLAGS} ${imap_include}"
	  	LIBS="${LIBS} ${imap_libs} "`echo ${imap_ldflags}`
	  	AC_LINK_IFELSE(
	    	AC_LANG_PROGRAM(
				[#include "c-client.h"
				void mm_searched (MAILSTREAM *stream,unsigned long number)
				{
				}
				void mm_exists (MAILSTREAM *stream,unsigned long number)
				{
				}
				void mm_expunged (MAILSTREAM *stream,unsigned long number)
				{
				}
				void mm_flags (MAILSTREAM *stream,unsigned long number)
				{
				}
				void mm_notify (MAILSTREAM *stream,char *string,long errflg)
				{
				}
				void mm_list (MAILSTREAM *stream,int delimiter,char *mailbox,long attributes)
				{
				}
				void mm_lsub (MAILSTREAM *stream,int delimiter,char *mailbox,long attributes)
				{
				}
				void mm_status (MAILSTREAM *stream,char *mailbox,MAILSTATUS *status)
				{
				}
				void mm_log (char *string,long errflg)
				{
				}
				void mm_dlog (char *string)
				{
				}
				void mm_login (NETMBX *mb,char *user,char *pwd,long trial)
				{
				}
				void mm_critical (MAILSTREAM *stream)
				{
				}
				void mm_nocritical (MAILSTREAM *stream)
				{
				}
				long mm_diskerror (MAILSTREAM *stream,long errcode,long serious)
				{
				}
				void mm_fatal (char *string)
				{
				}],
				[
				MAILSTREAM *foo = mail_open(NULL, "", 0);
				]
			),
			[ac_cv_imap_tk="yes"],
			[ac_cv_imap_tk="no"]
	   	)
		if test "${ac_cv_imap_tk}" = "yes"; then
			AC_LINK_IFELSE(
				AC_LANG_PROGRAM(
					[#include "c-client.h"
					void mm_searched (MAILSTREAM *stream,unsigned long number)
					{
					}
					void mm_exists (MAILSTREAM *stream,unsigned long number)
					{
					}
					void mm_expunged (MAILSTREAM *stream,unsigned long number)
					{
					}
					void mm_flags (MAILSTREAM *stream,unsigned long number)
					{
					}
					void mm_notify (MAILSTREAM *stream,char *string,long errflg)
					{
					}
					void mm_list (MAILSTREAM *stream,int delimiter,char *mailbox,long attributes)
					{
					}
					void mm_lsub (MAILSTREAM *stream,int delimiter,char *mailbox,long attributes)
					{
					}
					void mm_status (MAILSTREAM *stream,char *mailbox,MAILSTATUS *status)
					{
					}
					void mm_log (char *string,long errflg)
					{
					}
					void mm_dlog (char *string)
					{
					}
					void mm_login (NETMBX *mb,char *user,char *pwd,long trial)
					{
					}
					void mm_critical (MAILSTREAM *stream)
					{
					}
					void mm_nocritical (MAILSTREAM *stream)
					{
					}
					long mm_diskerror (MAILSTREAM *stream,long errcode,long serious)
					{
					}
					void mm_fatal (char *string)
					{
					}],
					[
					long check = mail_expunge_full(NULL, "", 0);
					]
				),
				[ac_cv_imap_tk2006="yes"],
				[ac_cv_imap_tk2006="no"]
			)
		fi
		CPPFLAGS="${saved_cppflags}"
		LIBS="${saved_libs}"
		if test "${ac_cv_imap_tk}" = "no"; then
			AC_MSG_RESULT(no)
			if test "${switch_to_system_on_failure}" = "yes"; then
				IMAP_TK_DIR="system"
			else #This means they specified a directory. Search for a package installation there too
				AC_MSG_CHECKING([for system c-client library...])
				CPPFLAGS="${saved_cppflags}"
				LIBS="${saved_libs}"
				imap_include="-I${IMAP_TK_DIR}/include"
				imap_ldflags="-L${IMAP_TK_DIR}/lib"
				imap_libs="-lc-client"
				CPPFLAGS="${CPPFLAGS} ${imap_include}"
				LIBS="${LIBS} ${imap_libs} ${imap_ldflags}"
				AC_LINK_IFELSE(
	    			AC_LANG_PROGRAM(
						[#include "c-client.h"
						void mm_searched (MAILSTREAM *stream,unsigned long number)
						{
						}
						void mm_exists (MAILSTREAM *stream,unsigned long number)
						{
						}
						void mm_expunged (MAILSTREAM *stream,unsigned long number)
						{
						}
						void mm_flags (MAILSTREAM *stream,unsigned long number)
						{
						}
						void mm_notify (MAILSTREAM *stream,char *string,long errflg)
						{
						}
						void mm_list (MAILSTREAM *stream,int delimiter,char *mailbox,long attributes)
						{
						}
						void mm_lsub (MAILSTREAM *stream,int delimiter,char *mailbox,long attributes)
						{
						}
						void mm_status (MAILSTREAM *stream,char *mailbox,MAILSTATUS *status)
						{
						}
						void mm_log (char *string,long errflg)
						{
						}
						void mm_dlog (char *string)
						{
						}
						void mm_login (NETMBX *mb,char *user,char *pwd,long trial)
						{
						}
						void mm_critical (MAILSTREAM *stream)
						{
						}
						void mm_nocritical (MAILSTREAM *stream)
						{
						}
						long mm_diskerror (MAILSTREAM *stream,long errcode,long serious)
						{
						}
						void mm_fatal (char *string)
						{
						}],
						[
						MAILSTREAM *foo = mail_open(NULL, "", 0);
						]
					),
					[ac_cv_imap_tk="yes"],
					[ac_cv_imap_tk="no"]
	   			)
				if test "${ac_cv_imap_tk}" = "yes"; then
					AC_LINK_IFELSE(
						AC_LANG_PROGRAM(
							[#include "c-client.h"
							void mm_searched (MAILSTREAM *stream,unsigned long number)
							{
							}
							void mm_exists (MAILSTREAM *stream,unsigned long number)
							{
							}
							void mm_expunged (MAILSTREAM *stream,unsigned long number)
							{
							}
							void mm_flags (MAILSTREAM *stream,unsigned long number)
							{
							}
							void mm_notify (MAILSTREAM *stream,char *string,long errflg)
							{
							}
							void mm_list (MAILSTREAM *stream,int delimiter,char *mailbox,long attributes)
							{
							}
							void mm_lsub (MAILSTREAM *stream,int delimiter,char *mailbox,long attributes)
							{
							}
							void mm_status (MAILSTREAM *stream,char *mailbox,MAILSTATUS *status)
							{
							}
							void mm_log (char *string,long errflg)
							{
							}
							void mm_dlog (char *string)
							{
							}
							void mm_login (NETMBX *mb,char *user,char *pwd,long trial)
							{
							}
							void mm_critical (MAILSTREAM *stream)
							{
							}
							void mm_nocritical (MAILSTREAM *stream)
							{
							}
							long mm_diskerror (MAILSTREAM *stream,long errcode,long serious)
							{
							}
							void mm_fatal (char *string)
							{
							}],
							[
							long check = mail_expunge_full(NULL, "", 0);
							]
						),
						[ac_cv_imap_tk2006="yes"],
						[ac_cv_imap_tk2006="no"]
					)
				fi
			fi
		fi
	fi 
	if test "${IMAP_TK_DIR}" = "system"; then
		#We will enter here if user specified "system" or if any of above checks failed
		AC_MSG_CHECKING([for system c-client library...])
		CPPFLAGS="${saved_cppflags}"
		LIBS="${saved_libs}"
		imap_ldflags=""
		imap_libs="-lc-client"
		imap_include="-DUSE_SYSTEM_IMAP" #Try the imap directory first
		CPPFLAGS="${CPPFLAGS} ${imap_include}"
		LIBS="${LIBS} ${imap_libs} "`echo ${imap_ldflags}`
		AC_LINK_IFELSE(
	    	AC_LANG_PROGRAM(
				[#include <stdio.h>
				#include <imap/c-client.h>
				void mm_searched (MAILSTREAM *stream,unsigned long number)
				{
				}
				void mm_exists (MAILSTREAM *stream,unsigned long number)
				{
				}
				void mm_expunged (MAILSTREAM *stream,unsigned long number)
				{
				}
				void mm_flags (MAILSTREAM *stream,unsigned long number)
				{
				}
				void mm_notify (MAILSTREAM *stream,char *string,long errflg)
				{
				}
				void mm_list (MAILSTREAM *stream,int delimiter,char *mailbox,long attributes)
				{
				}
				void mm_lsub (MAILSTREAM *stream,int delimiter,char *mailbox,long attributes)
				{
				}
				void mm_status (MAILSTREAM *stream,char *mailbox,MAILSTATUS *status)
				{
				}
				void mm_log (char *string,long errflg)
				{
				}
				void mm_dlog (char *string)
				{
				}
				void mm_login (NETMBX *mb,char *user,char *pwd,long trial)
				{
				}
				void mm_critical (MAILSTREAM *stream)
				{
				}
				void mm_nocritical (MAILSTREAM *stream)
				{
				}
				long mm_diskerror (MAILSTREAM *stream,long errcode,long serious)
				{
				}
				void mm_fatal (char *string)
				{
				}],
				[
				MAILSTREAM *foo = mail_open(NULL, "", 0);
				]
			),
			[ac_cv_imap_tk="yes"],
			[ac_cv_imap_tk="no"]
	   	)
		if test "${ac_cv_imap_tk}" = "yes"; then
			AC_LINK_IFELSE(
				AC_LANG_PROGRAM(
					[#include <stdio.h>
					#include <imap/c-client.h>
					void mm_searched (MAILSTREAM *stream,unsigned long number)
					{
					}
					void mm_exists (MAILSTREAM *stream,unsigned long number)
					{
					}
					void mm_expunged (MAILSTREAM *stream,unsigned long number)
					{
					}
					void mm_flags (MAILSTREAM *stream,unsigned long number)
					{
					}
					void mm_notify (MAILSTREAM *stream,char *string,long errflg)
					{
					}
					void mm_list (MAILSTREAM *stream,int delimiter,char *mailbox,long attributes)
					{
					}
					void mm_lsub (MAILSTREAM *stream,int delimiter,char *mailbox,long attributes)
					{
					}
					void mm_status (MAILSTREAM *stream,char *mailbox,MAILSTATUS *status)
					{
					}
					void mm_log (char *string,long errflg)
					{
					}
					void mm_dlog (char *string)
					{
					}
					void mm_login (NETMBX *mb,char *user,char *pwd,long trial)
					{
					}
					void mm_critical (MAILSTREAM *stream)
					{
					}
					void mm_nocritical (MAILSTREAM *stream)
					{
					}
					long mm_diskerror (MAILSTREAM *stream,long errcode,long serious)
					{
					}
					void mm_fatal (char *string)
					{
					}],
					[
					long check = mail_expunge_full(NULL, "", 0);
					]
				),
				[ac_cv_imap_tk2006="yes"],
				[ac_cv_imap_tk2006="no"]
			)
		else #looking in imap directory didn't work, try c-client
			imap_ldflags=""
			imap_libs="-lc-client"
			imap_include="-DUSE_SYSTEM_CCLIENT"
			CPPFLAGS="${saved_cppflags}"
			LIBS="${saved_libs}"
			CPPFLAGS="${CPPFLAGS} ${imap_include}"
			LIBS="${LIBS} ${imap_libs} "`echo ${imap_ldflags}`
			AC_LINK_IFELSE(
	    		AC_LANG_PROGRAM(
					[#include <stdio.h>
					#include <c-client/c-client.h>
					void mm_searched (MAILSTREAM *stream,unsigned long number)
					{
					}
					void mm_exists (MAILSTREAM *stream,unsigned long number)
					{
					}
					void mm_expunged (MAILSTREAM *stream,unsigned long number)
					{
					}
					void mm_flags (MAILSTREAM *stream,unsigned long number)
					{
					}
					void mm_notify (MAILSTREAM *stream,char *string,long errflg)
					{
					}
					void mm_list (MAILSTREAM *stream,int delimiter,char *mailbox,long attributes)
					{
					}
					void mm_lsub (MAILSTREAM *stream,int delimiter,char *mailbox,long attributes)
					{
					}
					void mm_status (MAILSTREAM *stream,char *mailbox,MAILSTATUS *status)
					{
					}
					void mm_log (char *string,long errflg)
					{
					}
					void mm_dlog (char *string)
					{
					}
					void mm_login (NETMBX *mb,char *user,char *pwd,long trial)
					{
					}
					void mm_critical (MAILSTREAM *stream)
					{
					}
					void mm_nocritical (MAILSTREAM *stream)
					{
					}
					long mm_diskerror (MAILSTREAM *stream,long errcode,long serious)
					{
					}
					void mm_fatal (char *string)
					{
					}],
					[
					MAILSTREAM *foo = mail_open(NULL, "", 0);
					]
				),
				[ac_cv_imap_tk="yes"],
				[ac_cv_imap_tk="no"]
	   		)
			if test "${ac_cv_imap_tk}" = "yes"; then
				AC_LINK_IFELSE(
					AC_LANG_PROGRAM(
						[#include <stdio.h>
						#include <c-client/c-client.h>
						void mm_searched (MAILSTREAM *stream,unsigned long number)
						{
						}
						void mm_exists (MAILSTREAM *stream,unsigned long number)
						{
						}
						void mm_expunged (MAILSTREAM *stream,unsigned long number)
						{
						}
						void mm_flags (MAILSTREAM *stream,unsigned long number)
						{
						}
						void mm_notify (MAILSTREAM *stream,char *string,long errflg)
						{
						}
						void mm_list (MAILSTREAM *stream,int delimiter,char *mailbox,long attributes)
						{
						}
						void mm_lsub (MAILSTREAM *stream,int delimiter,char *mailbox,long attributes)
						{
						}
						void mm_status (MAILSTREAM *stream,char *mailbox,MAILSTATUS *status)
						{
						}
						void mm_log (char *string,long errflg)
						{
						}
						void mm_dlog (char *string)
						{
						}
						void mm_login (NETMBX *mb,char *user,char *pwd,long trial)
						{
						}
						void mm_critical (MAILSTREAM *stream)
						{
						}
						void mm_nocritical (MAILSTREAM *stream)
						{
						}
						long mm_diskerror (MAILSTREAM *stream,long errcode,long serious)
						{
						}
						void mm_fatal (char *string)
						{
						}],
						[
						long check = mail_expunge_full(NULL, "", 0);
						]
					),
					[ac_cv_imap_tk2006="yes"],
					[ac_cv_imap_tk2006="no"]
				)
			fi
		fi
	fi
	if test "${ac_cv_imap_tk}" = "yes"; then
		AC_MSG_RESULT(yes)
		IMAP_TK_LIB="${imap_libs} "`echo ${imap_ldflags}`
		IMAP_TK_INCLUDE="${imap_include}"
		PBX_IMAP_TK=1
		AC_DEFINE([HAVE_IMAP_TK], 1, [Define if your system has the UW IMAP Toolkit c-client library.])
		if test "${ac_cv_imap_tk2006}" = "yes"; then
			AC_DEFINE([HAVE_IMAP_TK2006], 1, [Define if your system has the UW IMAP Toolkit c-client library version 2006 or greater.])
		fi
	else
		AC_MSG_RESULT(no) 
	fi
	CPPFLAGS="${saved_cppflags}"
	LIBS="${saved_libs}"
fi

AST_EXT_LIB_CHECK([IODBC], [iodbc], [SQLConnect], [sql.h], [${PTHREAD_LIBS}], [${PTHREAD_CFLAGS}])

AST_EXT_LIB_CHECK([INOTIFY], [c], [inotify_init], [sys/inotify.h])

AST_EXT_LIB_CHECK([JACK], [jack], [jack_activate], [jack/jack.h])

# BSD (and OS X) equivalent of inotify
AST_EXT_LIB_CHECK([KQUEUE], [c], [kqueue], [sys/event.h])

# 64-bit version of kevent (from kqueue) on OS X
AC_CHECK_FUNCS([kevent64])

# Needed by unixodbc
AST_EXT_LIB_CHECK([LTDL], [ltdl], [lt_dlinit], [ltdl.h], [])

AST_EXT_LIB_CHECK([LDAP], [ldap], [ldap_initialize], [ldap.h])

AC_ARG_ENABLE([xmldoc],
	[AS_HELP_STRING([--disable-xmldoc],
		[Explicity disable XML documentation])],
	[case "${enableval}" in
		y|ye|yes) disable_xmldoc=no ;;
		n|no)  disable_xmldoc=yes ;;
		*) AC_MSG_ERROR(bad value ${enableval} for --disable-xmldoc)  ;;
	esac], [disable_xmldoc=no])

if test "${disable_xmldoc}" != "yes"; then
	AST_EXT_TOOL_CHECK([LIBXML2], [xml2-config], , ,
	[#include <libxml/tree.h>
	#include <libxml/parser.h>],
	[LIBXML_TEST_VERSION])
	if test "${PBX_LIBXML2}" != 1; then
		AC_MSG_NOTICE(*** XML documentation will not be available because the 'libxml2' development package is missing.)
		AC_MSG_NOTICE(*** Please run the 'configure' script with the '--disable-xmldoc' parameter option)
		AC_MSG_NOTICE(*** or install the 'libxml2' development package.)
		exit 1
	fi
fi

AST_EXT_LIB_CHECK([MISDN], [mISDN], [mISDN_open], [mISDNuser/mISDNlib.h])

if test "${PBX_MISDN}" = 1; then
   AST_EXT_LIB_CHECK([ISDNNET], [isdnnet], [init_manager], [mISDNuser/isdn_net.h], [-lmISDN -lpthread])
   AST_EXT_LIB_CHECK([SUPPSERV], [suppserv], [encodeFac], [mISDNuser/suppserv.h])
   AST_C_DEFINE_CHECK([MISDN_FAC_RESULT], [Fac_RESULT], [mISDNuser/suppserv.h])
   AST_C_DEFINE_CHECK([MISDN_FAC_ERROR], [Fac_ERROR], [mISDNuser/suppserv.h])
   AC_CHECK_HEADER([linux/mISDNdsp.h], [AC_DEFINE_UNQUOTED([MISDN_1_2], 1, [Build chan_misdn for mISDN 1.2 or later.])])
   AC_CHECK_MEMBER([Q931_info_t.redirect_dn], [], [PBX_MISDN=0], [#include <mISDNuser/mISDNlib.h>])
fi

AST_EXT_TOOL_CHECK([MYSQLCLIENT], [mysql_config])

AST_EXT_LIB_CHECK([NBS], [nbs], [nbs_connect], [nbs.h])

AST_EXT_LIB_CHECK([NCURSES], [ncurses], [initscr], [curses.h])

AST_EXT_TOOL_CHECK([NEON], [neon-config])

AST_EXT_TOOL_CHECK([NEON29], [neon-config], , [--libs],
[#include <ne_auth.h>],
[#ifndef NE_AUTH_NTLM
#error Need libneon >= 0.29.0
#endif])

AST_EXT_TOOL_CHECK([NETSNMP], [net-snmp-config], , [--agent-libs],
[#include <net-snmp/net-snmp-config.h>
#include <net-snmp/net-snmp-includes.h>
#include <net-snmp/agent/net-snmp-agent-includes.h>],
[int callback = snmp_register_callback(0, 0, NULL, NULL)])

AST_EXT_LIB_CHECK([NEWT], [newt], [newtBell], [newt.h])

AST_EXT_LIB_CHECK([UNIXODBC], [odbc], [SQLConnect], [sql.h], [])

AST_EXT_LIB_CHECK([OGG], [ogg], [ogg_sync_init], [])

# Non-glibc platforms require libexecinfo for backtrace support
AST_EXT_LIB_CHECK([BKTR], [execinfo], [backtrace], [execinfo.h])
# Linux, however, has backtrace directly in glibc
AST_EXT_LIB_CHECK([BKTR], [c], [backtrace], [execinfo.h])

AST_EXT_LIB_CHECK([BLUETOOTH], [bluetooth], [ba2str], [bluetooth/bluetooth.h])

# possible places for oss definitions
AST_EXT_LIB_CHECK([OSS], [ossaudio], [], [linux/soundcard.h])
AST_EXT_LIB_CHECK([OSS], [ossaudio], [], [sys/soundcard.h])
AST_EXT_LIB_CHECK([OSS], [ossaudio], [oss_ioctl_mixer], [soundcard.h])

PG_CONFIG=No
if test "${USE_PGSQL}" != "no"; then	
   if test "x${PGSQL_DIR}" != "x"; then
      AC_PATH_TOOL([PG_CONFIG], [pg_config], No, [${PGSQL_DIR}/bin])
      if test x"${PG_CONFIG}" = xNo; then
         AC_MSG_NOTICE([***])
         AC_MSG_NOTICE([*** pg_config was not found in the path you specified:])
         AC_MSG_NOTICE([*** ${PGSQL_DIR}/bin])
         AC_MSG_NOTICE([*** Either correct the installation, or run configure])
         AC_MSG_NOTICE([*** including --without-postgres])
         exit 1
      fi
   else
      AC_PATH_TOOL([PG_CONFIG], [pg_config], No)
   fi
fi
if test "${PG_CONFIG}" != No; then
   PGSQL_libdir=`${PG_CONFIG} --libdir`
   PGSQL_includedir=`${PG_CONFIG} --includedir`
   if test "x$?" != "x0" ; then
      if test -n "${PGSQL_MANDATORY}" ; then
         AC_MSG_NOTICE([***])
         AC_MSG_NOTICE([*** The PostgreSQL installation on this system appears to be broken.])
         AC_MSG_NOTICE([*** Either correct the installation, or run configure])
         AC_MSG_NOTICE([*** including --without-postgres])
         exit 1
	  fi
   else 
      AC_CHECK_LIB([pq], [PQescapeStringConn], AC_DEFINE_UNQUOTED([HAVE_PGSQL], 1,
      [Define to indicate the PostgreSQL library]), [], -L${PGSQL_libdir} -lz)

      if test "${ac_cv_lib_pq_PQescapeStringConn}" = "yes"; then
         PGSQL_LIB="-L${PGSQL_libdir} -lpq -lz"
         PGSQL_INCLUDE="-I${PGSQL_includedir}"
         PBX_PGSQL=1
      elif test -n "${PGSQL_MANDATORY}";
      then
         AC_MSG_NOTICE([***])
         AC_MSG_NOTICE([*** The PostgreSQL installation on this system appears to be broken.])
         AC_MSG_NOTICE([*** Either correct the installation, or run configure])
         AC_MSG_NOTICE([*** including --without-postgres])
         exit 1
      fi
   fi
fi

AST_EXT_LIB_CHECK([POPT], [popt], [poptStrerror], [popt.h])

AST_EXT_LIB_CHECK([PORTAUDIO], [portaudio], [Pa_GetDeviceCount], [portaudio.h])

AST_EXT_LIB_CHECK([PRI], [pri], [pri_connected_line_update], [libpri.h])
AST_EXT_LIB_CHECK([PRI_MWI], [pri], [pri_mwi_indicate], [libpri.h])
AST_EXT_LIB_CHECK([PRI_MCID], [pri], [pri_mcid_enable], [libpri.h])
AST_EXT_LIB_CHECK([PRI_CALL_WAITING], [pri], [pri_connect_ack_enable], [libpri.h])
AST_EXT_LIB_CHECK([PRI_AOC_EVENTS], [pri], [pri_aoc_events_enable], [libpri.h])
AST_EXT_LIB_CHECK([PRI_TRANSFER], [pri], [pri_transfer_enable], [libpri.h])
AST_EXT_LIB_CHECK([PRI_CCSS], [pri], [pri_cc_enable], [libpri.h])
AST_EXT_LIB_CHECK([PRI_HANGUP_FIX], [pri], [pri_hangup_fix_enable], [libpri.h])
AST_EXT_LIB_CHECK([PRI_SUBADDR], [pri], [pri_sr_set_called_subaddress], [libpri.h])
AST_EXT_LIB_CHECK([PRI_CALL_HOLD], [pri], [pri_hold_enable], [libpri.h])
AST_EXT_LIB_CHECK([PRI_CALL_REROUTING], [pri], [pri_reroute_enable], [libpri.h])
AST_EXT_LIB_CHECK([PRI_SETUP_KEYPAD], [pri], [pri_sr_set_keypad_digits], [libpri.h])

# ------------------------------------v
# TODO: The code can be changed to always include these features now.
# These features will always be present if pri_connected_line_update is available.
AST_EXT_LIB_CHECK([PRI_PROG_W_CAUSE], [pri], [pri_progress_with_cause], [libpri.h])
AST_EXT_LIB_CHECK([PRI_INBANDDISCONNECT], [pri], [pri_set_inbanddisconnect], [libpri.h])
AST_EXT_LIB_CHECK([PRI_SERVICE_MESSAGES], [pri], [pri_maintenance_service], [libpri.h])
AST_EXT_LIB_CHECK([PRI_REVERSE_CHARGE], [pri], [pri_sr_set_reversecharge], [libpri.h])
# ------------------------------------^

AST_EXT_LIB_CHECK([RESAMPLE], [resample], [resample_open], [libresample.h], [-lm])

AST_C_COMPILE_CHECK([SPANDSP], [
		#if SPANDSP_RELEASE_DATE < 20080516
		#error "spandsp 0.0.5 or greater is required"
		#endif
	], [spandsp/version.h], , [minimum version of SpanDSP])

if test "x${PBX_SPANDSP}" = "x1" ; then
	# We found the correct version in the header, now let's make sure it links
	# properly, and that libtiff is available
	PBX_SPANDSP=0
	AST_EXT_LIB_CHECK([SPANDSP], [spandsp], [span_set_message_handler], [spandsp.h], [-ltiff])
fi

if test "x${PBX_SPANDSP}" = "x1" ; then
	# We also need t38_terminal_init()
	PBX_SPANDSP=0
	AST_EXT_LIB_CHECK([SPANDSP], [spandsp], [t38_terminal_init], [spandsp.h], [-ltiff])
fi

AST_EXT_LIB_CHECK([SS7], [ss7], [ss7_pollflags], [libss7.h])

AST_EXT_LIB_CHECK([OPENR2], [openr2], [openr2_chan_new], [openr2.h])

if test "${USE_PWLIB}" != "no"; then
	if test -n "${PWLIB_DIR}"; then
		PWLIBDIR="${PWLIB_DIR}"
	fi
	AST_CHECK_PWLIB()
	AST_CHECK_PWLIB_VERSION([PWLib], [PWLIB], [ptbuildopts.h], [1], [9], [2], [P[[WT]]LIB_VERSION])
		
	if test "${HAS_PWLIB:-unset}" != "unset"; then
		AST_CHECK_PWLIB_PLATFORM()

		PLATFORM_PWLIB="pt_${PWLIB_PLATFORM}_r"

		AST_CHECK_PWLIB_BUILD([PWLib], [PWLIB],
			[Define if your system has the PWLib libraries.],
			[#include "ptlib.h"],
			[int q = (int) PTime::IsDaylightSavings();])
	fi
fi

if test "${PBX_PWLIB}" = "1" -a "${USE_OPENH323}" != "no" ; then
	if test -n "${OPENH323_DIR}"; then
		OPENH323DIR="${OPENH323_DIR}"
	fi
	AST_CHECK_OPENH323()
	AST_CHECK_PWLIB_VERSION([OpenH323], [OPENH323], [openh323buildopts.h], [1], [17], [3], [], [1], [19], [0])
	AST_CHECK_OPENH323_BUILD()
	PLATFORM_OPENH323="h323_${PWLIB_PLATFORM}_${OPENH323_SUFFIX}"
	AST_CHECK_PWLIB_BUILD([OpenH323], [OPENH323],
		[Define if your system has the OpenH323 libraries.],
		[#include "ptlib.h"
		#include "h323.h"
		#include "h323ep.h"],
		[H323EndPoint ep = H323EndPoint();],
		[${PWLIB_INCLUDE}], [${PWLIB_LIB}])
fi

AST_EXT_LIB_CHECK([LUA], [lua5.1], [luaL_newstate], [lua5.1/lua.h], [-lm]) 
if test "x${PBX_LUA}" = "x1" ; then
	if test x"${LUA_DIR}" = x; then
		LUA_INCLUDE="${LUA_INCLUDE} -I/usr/include/lua5.1"
	else
		LUA_INCLUDE="${LUA_INCLUDE} -I${LUA_DIR}/lua5.1"
	fi
fi
	
# Some distributions (like SuSE) remove the 5.1 suffix.
AST_EXT_LIB_CHECK([LUA], [lua], [luaL_register], [lua.h], [-lm]) 

AST_EXT_LIB_CHECK([RADIUS], [radiusclient-ng], [rc_read_config], [radiusclient-ng.h])

# This is a bit complex... in reality, Asterisk's AIS support is dependent on finding
# *any* implementation of AIS, not just OpenAIS. However, the configure script needs
# to know the specifics of each possible implementation, and then represent the one
# that was found as 'AIS'.

PBX_AIS=0

# OpenAIS installs its libraries into /usr/lib/openais by default, so check there

AST_EXT_LIB_CHECK([OPENAIS], [SaClm], [saClmInitialize], [openais/saClm.h], [-L/usr/lib/openais -L/usr/lib64/openais])

if test "${PBX_OPENAIS}" = 1; then
   PBX_AIS=1
   if test -n "${OPENAIS_DIR}"; then
      AIS_INCLUDE="${OPENAIS_INCLUDE}/openais"
      AIS_LIB="-lSaEvt ${OPENAIS_LIB}"
   else
      AIS_INCLUDE="-I/usr/include/openais"
      AIS_LIB="-lSaClm -lSaEvt -L/usr/lib/openais -L/usr/lib64/openais"
   fi
fi

AC_SUBST(PBX_AIS)
AC_SUBST(AIS_INCLUDE)
AC_SUBST(AIS_LIB)

AST_EXT_LIB_CHECK([SPEEX], [speex], [speex_encode], [speex/speex.h], [-lm])

# See if the main speex library contains the preprocess functions
AST_EXT_LIB_CHECK([SPEEX_PREPROCESS], [speex], [speex_preprocess_ctl], [speex/speex.h], [-lm])
if test "${PBX_SPEEX_PREPROCESS}" = 1; then
   PBX_SPEEX_PREPROCESS=1
fi

AST_EXT_LIB_CHECK([SPEEXDSP], [speexdsp], [speex_preprocess_ctl], [speex/speex.h], [-lm])
if test "${PBX_SPEEXDSP}" = 1; then
   PBX_SPEEX_PREPROCESS=1
fi

AC_SUBST(PBX_SPEEX_PREPROCESS)

AST_EXT_LIB_CHECK([SQLITE], [sqlite], [sqlite_exec], [sqlite.h])

AST_EXT_LIB_CHECK([SQLITE3], [sqlite3], [sqlite3_open], [sqlite3.h])

AST_EXT_LIB_CHECK([CRYPTO], [crypto], [AES_encrypt], [openssl/aes.h])

if test "$PBX_CRYPTO" = "1";
then
    AST_EXT_LIB_CHECK([OPENSSL], [ssl], [ssl2_connect], [openssl/ssl.h], [-lcrypto])
fi

if test "$PBX_OPENSSL" = "1";
then
    AST_CHECK_OSPTK([3], [6], [0])
fi

AST_EXT_LIB_CHECK([SRTP], [srtp], [srtp_init], [srtp/srtp.h])

if test "$PBX_SRTP" = "1";
then
    saved_libs="${LIBS}"
    saved_ldflags="${LDFLAGS}"
    saved_cflags="${CFLAGS}"
    LIBS="${LIBS} ${SRTP_LIB}"
    LDFLAGS="${LDFLAGS} -shared -fPIC"
    CFLAGS="${CFLAGS} ${SRTP_INCLUDE}"
    AC_MSG_CHECKING(for the ability of -lsrtp to be linked in a shared object)
    AC_LINK_IFELSE(
    [
        AC_LANG_PROGRAM(
            [#include <srtp/srtp.h>],
            [srtp_init();]
        )
    ],
    [ AC_MSG_RESULT(yes) ],
    [
        AC_MSG_RESULT(no)
        AC_MSG_NOTICE(***)
        AC_MSG_NOTICE(*** libsrtp could not be linked as a shared object)
        AC_MSG_NOTICE(*** try compiling libsrtp manually and configuring with)
        AC_MSG_NOTICE(*** ./configure CFLAGS=-fPIC --prefix=/usr)
        AC_MSG_NOTICE(*** replacing /usr with the prefix of your choice)
        AC_MSG_NOTICE(***)
        AC_MSG_NOTICE(*** If you do not need SRTP support re-run configure)
        AC_MSG_NOTICE(*** with the --without-srtp option.)
        exit 1
    ]
    )
    LIBS="${saved_libs}"
    LDFLAGS="${saved_ldflags}"
    CFLAGS="${saved_cflags}"
fi

AST_EXT_TOOL_CHECK([GMIME], [gmime-config], [], [], [#include <gmime/gmime.h>], [gboolean q = g_mime_check_version(0,0,0);])

AST_EXT_LIB_CHECK([HOARD], [hoard], [malloc], [])

AST_EXT_LIB_CHECK([FREETDS], [sybdb], [dbinit], [sybdb.h])

AST_EXT_LIB_CHECK([TERMCAP], [termcap], [tgetent], [])

AST_EXT_LIB_CHECK([TINFO], [tinfo], [tgetent], [])

AC_CHECK_LIB([tonezone], [tone_zone_find_by_num], tonezone_does_not_need_lm=yes, tonezone_does_not_need_lm=no)

if test "${tonezone_does_not_need_lm}" = "no" ; then
  tonezone_extra="-lm"
fi

AST_EXT_LIB_CHECK([TONEZONE], [tonezone], [tone_zone_find], [dahdi/tonezone.h], [${tonezone_extra} ${DAHDI_INCLUDE}])

AST_EXT_LIB_CHECK([USB], [usb], [usb_init], [usb.h], [])

if test "${OSARCH}" = "OpenBSD";
then
	AST_EXT_LIB_CHECK([VORBIS], [vorbis], [vorbis_info_init], [vorbis/codec.h], [-lm -lvorbisenc -logg])
else
	AST_EXT_LIB_CHECK([VORBIS], [vorbis], [vorbis_info_init], [vorbis/codec.h], [-lm -lvorbisenc])
fi

AC_LANG_PUSH(C++)

if test "${USE_VPB}" != "no"; then
   AC_MSG_CHECKING(for vpb_open in -lvpb)
   saved_libs="${LIBS}"
   saved_cppflags="${CPPFLAGS}"
   if test "x${VPB_DIR}" != "x"; then
      if test -d ${VPB_DIR}/lib; then
         vpblibdir=${VPB_DIR}/lib
      else
         vpblibdir=${VPB_DIR}
      fi
      LIBS="${LIBS} -L${vpblibdir}"
      CPPFLAGS="${CPPFLAGS} -I${VPB_DIR}/include"
   fi
   LIBS="${PTHREAD_LIBS} ${LIBS} -lvpb"
   CPPFLAGS="${CPPFLAGS} ${PTHREAD_CFLAGS}"
   AC_LINK_IFELSE(
	[
	AC_LANG_PROGRAM(
	[#include <vpbapi.h>],
	[int q = vpb_open(0,0);])
	],
	[	AC_MSG_RESULT(yes) 
		ac_cv_lib_vpb_vpb_open="yes" 
	],
	[	AC_MSG_RESULT(no) 
		ac_cv_lib_vpb_vpb_open="no" 
	]
	)
   LIBS="${saved_libs}"
   CPPFLAGS="${saved_cppflags}"
   if test "${ac_cv_lib_vpb_vpb_open}" = "yes"; then
	VPB_LIB="-lvpb"
	if test "${VPB_DIR}" != ""; then
	   VPB_LIB="-L${vpblibdir}  ${VPB_LIB}"
	   VPB_INCLUDE="-I${VPB_DIR}/include"
	fi
	PBX_VPB=1
	AC_DEFINE([HAVE_VPB], 1, [Define if your system has the VoiceTronix API libraries.])
   fi
fi

AC_LANG_POP

AST_EXT_LIB_CHECK([ZLIB], [z], [compress], [zlib.h])

EDITLINE_LIB=""
if test "x$TERMCAP_LIB" != "x" ; then
  EDITLINE_LIB="$TERMCAP_LIB"
elif test "x$TINFO_LIB" != "x" ; then
  EDITLINE_LIB="$TINFO_LIB"
elif test "x$CURSES_LIB" != "x" ; then
  EDITLINE_LIB="$CURSES_LIB"
elif test "x$NCURSES_LIB" != "x" ; then
  EDITLINE_LIB="$NCURSES_LIB"
else
  AC_MSG_ERROR([*** termcap support not found (on modern systems, this typically means the ncurses development package is missing)])
fi
AC_SUBST(EDITLINE_LIB)

if test "x${PBX_UNIXODBC}" = "x1" -o "x${PBX_IODBC}" = "x1"; then
	# Does ODBC support wide characters?
	AC_MSG_CHECKING(whether ODBC has support for Unicode types)