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  • # Various support functions for configure.ac in asterisk
    #
    
    # Helper function to check for gcc attributes.
    
    # AST_GCC_ATTRIBUTE([attribute name])
    
    AC_DEFUN([AST_GCC_ATTRIBUTE],
    [
    
    AC_MSG_CHECKING(for compiler 'attribute $1' support)
    
    saved_CFLAGS="$CFLAGS"
    CFLAGS="$CFLAGS -Werror"
    
    	AC_LANG_PROGRAM([static void __attribute__(($1)) *test(void *muffin, ...) {}],
    
    			[]),
    	AC_MSG_RESULT(yes)
    	AC_DEFINE_UNQUOTED([HAVE_ATTRIBUTE_$1], 1, [Define to 1 if your GCC C compiler supports the '$1' attribute.]),
    	AC_MSG_RESULT(no))
    
    ]
    CFLAGS="$saved_CFLAGS"
    )
    
    # Helper function to setup variables for a package.
    # $1 -> the package name. Used in configure.ac and also as a prefix
    #	for the variables ($1_DIR, $1_INCLUDE, $1_LIB) in makeopts
    # $3 ->	option name, used in --with-$3 or --without-$3 when calling configure.
    # $2 and $4 are just text describing the package (short and long form)
    
    # AST_EXT_LIB_SETUP([package], [short description], [configure option name], [long description])
    
        $1_DESCRIP="$2"
        $1_OPTION="$3"
        AC_ARG_WITH([$3], AC_HELP_STRING([--with-$3=PATH],[use $2 files in PATH $4]),
        [
    	case ${withval} in
    	n|no)
    	USE_$1=no
    	;;
    	y|ye|yes)
    	ac_mandatory_list="${ac_mandatory_list} $1"
    	;;
    	*)
    	$1_DIR="${withval}"
    	ac_mandatory_list="${ac_mandatory_list} $1"
    	;;
    	esac
        ])
        PBX_$1=0
        AC_SUBST([$1_LIB])
        AC_SUBST([$1_INCLUDE])
        AC_SUBST([$1_DIR])
        AC_SUBST([PBX_$1])
    
    # Check whether any of the mandatory modules are not present, and
    
    # print error messages in case. The mandatory list is built using
    # --with-* arguments when invoking configure.
    
    
    AC_DEFUN([AST_CHECK_MANDATORY],
    [
    	AC_MSG_CHECKING([for mandatory modules: ${ac_mandatory_list}])
    	err=0;
    	for i in ${ac_mandatory_list}; do
    		eval "a=\${PBX_$i}"
    		if test "x${a}" = "x1" ; then continue; fi
    		if test ${err} = "0" ; then AC_MSG_RESULT(fail) ; fi
    		AC_MSG_RESULT()
    		eval "a=\${${i}_OPTION}"
    
    		AC_MSG_NOTICE([***])
    		AC_MSG_NOTICE([*** The $i installation appears to be missing or broken.])
    		AC_MSG_NOTICE([*** Either correct the installation, or run configure])
    		AC_MSG_NOTICE([*** including --without-${a}.])
    
    		err=1
    	done
    	if test $err = 1 ; then exit 1; fi
    	AC_MSG_RESULT(ok)
    ])
    
    
    # The next three functions check for the availability of a given package.
    # AST_C_DEFINE_CHECK looks for the presence of a #define in a header file,
    
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    # AST_C_COMPILE_CHECK can be used for testing for various items in header files,
    
    # AST_EXT_LIB_CHECK looks for a symbol in a given library, or at least
    #	for the presence of a header file.
    # AST_EXT_TOOL_CHECK looks for a symbol in using $1-config to determine CFLAGS and LIBS
    #
    # They are only run if PBX_$1 != 1 (where $1 is the package),
    # so you can call them multiple times and stop at the first matching one.
    # On success, they both set PBX_$1 = 1, set $1_INCLUDE and $1_LIB as applicable,
    # and also #define HAVE_$1 1 and #define HAVE_$1_VERSION ${last_argument}
    # in autoconfig.h so you can tell which test succeeded.
    # They should be called after AST_EXT_LIB_SETUP($1, ...)
    
    
    # Check if a given macro is defined in a certain header.
    
    
    # AST_C_DEFINE_CHECK([package], [macro name], [header file], [version])
    
        if test "x${PBX_$1}" != "x1"; then
    
    	AC_MSG_CHECKING([for $2 in $3])
    	saved_cppflags="${CPPFLAGS}"
    	if test "x${$1_DIR}" != "x"; then
    
    	    $1_INCLUDE="-I${$1_DIR}/include"
    
    	fi
    	CPPFLAGS="${CPPFLAGS} ${$1_INCLUDE}"
    
    	AC_COMPILE_IFELSE(
    
    	    [ AC_LANG_PROGRAM( [#include <$3>],
    			       [#if defined($2)
    				int foo = 0;
    			        #else
    			        int foo = bar;
    			        #endif
    				0
    			       ])],
    
    	    [   AC_MSG_RESULT(yes)
    		PBX_$1=1
    		AC_DEFINE([HAVE_$1], 1, [Define if your system has the $1 headers.])
    		AC_DEFINE([HAVE_$1_VERSION], $4, [Define $1 headers version])
    	    ],
    
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    # Check if a given expression will compile using a certain header.
    
    
    # AST_C_COMPILE_CHECK([package], [expression], [header file], [version], [description])
    
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    AC_DEFUN([AST_C_COMPILE_CHECK],
    [
        if test "x${PBX_$1}" != "x1" -a "${USE_$1}" != "no"; then
    
            if test "x$5" != "x"; then
                AC_MSG_CHECKING([for $5])
    	else
                AC_MSG_CHECKING([if "$2" compiles using $3])
    	fi
    
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    	saved_cppflags="${CPPFLAGS}"
    	if test "x${$1_DIR}" != "x"; then
    	    $1_INCLUDE="-I${$1_DIR}/include"
    	fi
    	CPPFLAGS="${CPPFLAGS} ${$1_INCLUDE}"
    
    	AC_COMPILE_IFELSE(
    	    [ AC_LANG_PROGRAM( [#include <$3>],
    			       [ $2; ]
    			       )],
    	    [   AC_MSG_RESULT(yes)
    		PBX_$1=1
    		AC_DEFINE([HAVE_$1], 1, [Define if your system has the $1 headers.])
    		AC_DEFINE([HAVE_$1_VERSION], $4, [Define $1 headers version])
    	    ],
    	    [       AC_MSG_RESULT(no) ] 
    	)
    	CPPFLAGS="${saved_cppflags}"
        fi
    ])
    
    
    
    # Check for existence of a given package ($1), either looking up a function
    
    # in a library, or, if no function is supplied, only check for the
    # existence of the header files.
    
    # AST_EXT_LIB_CHECK([package], [library], [function], [header],
    #	 [extra libs], [extra cflags], [version])
    
    if test "x${PBX_$1}" != "x1" -a "${USE_$1}" != "no"; then
    
       # if --with-$1=DIR has been specified, use it.
    
       if test "x${$1_DIR}" != "x"; then
          if test -d ${$1_DIR}/lib; then
          	 pbxlibdir="-L${$1_DIR}/lib"
          else
          	 pbxlibdir="-L${$1_DIR}"
          fi
    
       pbxfuncname="$3"
       if test "x${pbxfuncname}" = "x" ; then   # empty lib, assume only headers
          AST_$1_FOUND=yes
       else
          AC_CHECK_LIB([$2], [${pbxfuncname}], [AST_$1_FOUND=yes], [AST_$1_FOUND=no], ${pbxlibdir} $5)
       fi
    
       # now check for the header.
    
          $1_LIB="${pbxlibdir} -l$2 $5"
          # if --with-$1=DIR has been specified, use it.
    
          if test "x${$1_DIR}" != "x"; then
    	 $1_INCLUDE="-I${$1_DIR}/include"
    
          fi
          $1_INCLUDE="${$1_INCLUDE} $6"
          if test "x$4" = "x" ; then	# no header, assume found
             $1_HEADER_FOUND="1"
          else				# check for the header
             saved_cppflags="${CPPFLAGS}"
    
    	 AC_CHECK_HEADER([$4], [$1_HEADER_FOUND=1], [$1_HEADER_FOUND=0])
             CPPFLAGS="${saved_cppflags}"
    
          if test "x${$1_HEADER_FOUND}" = "x0" ; then
             $1_LIB=""
             $1_INCLUDE=""
    
             if test "x${pbxfuncname}" = "x" ; then		# only checking headers -> no library
    	    $1_LIB=""
    	 fi
    
             # XXX don't know how to evaluate the description (third argument) in AC_DEFINE_UNQUOTED
             AC_DEFINE_UNQUOTED([HAVE_$1], 1, [Define this to indicate the ${$1_DESCRIP} library])
    
    	 AC_DEFINE_UNQUOTED([HAVE_$1_VERSION], [$7], [Define to indicate the ${$1_DESCRIP} library version])
    
    # Check for a package using $2-config. Similar to AST_EXT_LIB_CHECK,
    # but use $2-config to determine cflags and libraries to use.
    
    # $3 and $4 can be used to replace --cflags and --libs in the request
    
    # AST_EXT_TOOL_CHECK([package], [tool name], [--cflags], [--libs], [includes], [expression])
    
        if test "x${PBX_$1}" != "x1" -a "${USE_$1}" != "no"; then
    	PBX_$1=0
    	AC_CHECK_TOOL(CONFIG_$1, $2-config, No)
    	if test ! "x${CONFIG_$1}" = xNo; then
    
    	    if test x"$3" = x ; then A=--cflags ; else A="$3" ; fi
    	    $1_INCLUDE=$(${CONFIG_$1} $A)
    	    if test x"$4" = x ; then A=--libs ; else A="$4" ; fi
    	    $1_LIB=$(${CONFIG_$1} $A)
    
    	    if test x"$5" != x ; then
    		saved_cppflags="${CPPFLAGS}"
    		if test "x${$1_DIR}" != "x"; then
    		    $1_INCLUDE="-I${$1_DIR}/include"
    		fi
    		CPPFLAGS="${CPPFLAGS} ${$1_INCLUDE}"
    
    
    		saved_ldflags="${LDFLAGS}"
    		LDFLAGS="${$1_LIB}"
    
    		AC_LINK_IFELSE(
    
    		    [ AC_LANG_PROGRAM( [ $5 ],
    				       [ $6; ]
    				       )],
    		    [   PBX_$1=1
    			AC_DEFINE([HAVE_$1], 1, [Define if your system has the $1 headers.])
    		    ],
    		    []
    		)
    		CPPFLAGS="${saved_cppflags}"
    
    	    else
    		PBX_$1=1
    		AC_DEFINE([HAVE_$1], 1, [Define if your system has the $1 libraries.])
    	    fi
    
    [AST_CHECK_GNU_MAKE], [AC_CACHE_CHECK(for GNU make, GNU_MAKE,
    
       GNU_MAKE_VERSION_MAJOR=0 ;
       GNU_MAKE_VERSION_MINOR=0 ;
    
       for a in make gmake gnumake ; do
          if test -z "$a" ; then continue ; fi ;
          if ( sh -c "$a --version" 2> /dev/null | grep GNU  2>&1 > /dev/null ) ;  then
             GNU_MAKE=$a ;
    
             GNU_MAKE_VERSION_MAJOR=`$GNU_MAKE --version | grep "GNU Make" | cut -f3 -d' ' | cut -f1 -d'.'`
    
             GNU_MAKE_VERSION_MINOR=`$GNU_MAKE --version | grep "GNU Make" | cut -f2 -d'.' | cut -c1-2`
    
             break;
          fi
       done ;
    ) ;
    if test  "x$GNU_MAKE" = "xNot Found"  ; then
    
       AC_MSG_ERROR( *** Please install GNU make.  It is required to build Asterisk!)
    
    
    AC_DEFUN(
    [AST_CHECK_PWLIB], [
    PWLIB_INCDIR=
    PWLIB_LIBDIR=
    
    AC_LANG_PUSH([C++])
    
    if test "${PWLIBDIR:-unset}" != "unset" ; then
    
      AC_CHECK_HEADER(${PWLIBDIR}/version.h, HAS_PWLIB=1, )
    
    fi
    if test "${HAS_PWLIB:-unset}" = "unset" ; then
      if test "${OPENH323DIR:-unset}" != "unset"; then
    
        AC_CHECK_HEADER(${OPENH323DIR}/../pwlib/version.h, HAS_PWLIB=1, )
    
      fi
      if test "${HAS_PWLIB:-unset}" != "unset" ; then
        PWLIBDIR="${OPENH323DIR}/../pwlib"
      else
    
        AC_CHECK_HEADER(${HOME}/pwlib/include/ptlib.h, HAS_PWLIB=1, )
    
        if test "${HAS_PWLIB:-unset}" != "unset" ; then
          PWLIBDIR="${HOME}/pwlib"
        else
    
          AC_CHECK_HEADER(/usr/local/include/ptlib.h, HAS_PWLIB=1, )
    
          if test "${HAS_PWLIB:-unset}" != "unset" ; then
            AC_PATH_PROG(PTLIB_CONFIG, ptlib-config, , /usr/local/bin)
            if test "${PTLIB_CONFIG:-unset}" = "unset" ; then
              AC_PATH_PROG(PTLIB_CONFIG, ptlib-config, , /usr/local/share/pwlib/make)
            fi
            PWLIB_INCDIR="/usr/local/include"
    
            PWLIB_LIBDIR=`${PTLIB_CONFIG} --pwlibdir`
            if test "${PWLIB_LIBDIR:-unset}" = "unset"; then
              if test "x$LIB64" != "x"; then
                PWLIB_LIBDIR="/usr/local/lib64"
              else
                PWLIB_LIBDIR="/usr/local/lib"
              fi
    
            PWLIB_LIB=`${PTLIB_CONFIG} --ldflags --libs`
            PWLIB_LIB="-L${PWLIB_LIBDIR} `echo ${PWLIB_LIB}`"
    
            AC_CHECK_HEADER(/usr/include/ptlib.h, HAS_PWLIB=1, )
    
            if test "${HAS_PWLIB:-unset}" != "unset" ; then
              AC_PATH_PROG(PTLIB_CONFIG, ptlib-config, , /usr/share/pwlib/make)
              PWLIB_INCDIR="/usr/include"
    
              PWLIB_LIBDIR=`${PTLIB_CONFIG} --pwlibdir`
              if test "${PWLIB_LIBDIR:-unset}" = "unset"; then
                if test "x$LIB64" != "x"; then
                  PWLIB_LIBDIR="/usr/lib64"
                else
                  PWLIB_LIBDIR="/usr/lib"
                fi
              fi
              PWLIB_LIB=`${PTLIB_CONFIG} --ldflags --libs`
              PWLIB_LIB="-L${PWLIB_LIBDIR} `echo ${PWLIB_LIB}`"
    
            fi
          fi
        fi
      fi
    fi
    
    #if test "${HAS_PWLIB:-unset}" = "unset" ; then
    #  echo "Cannot find pwlib - please install or set PWLIBDIR and try again"
    #  exit
    #fi
    
    if test "${HAS_PWLIB:-unset}" != "unset" ; then
      if test "${PWLIBDIR:-unset}" = "unset" ; then
        if test "${PTLIB_CONFIG:-unset}" != "unset" ; then
          PWLIBDIR=`$PTLIB_CONFIG --prefix`
        else
          echo "Cannot find ptlib-config - please install and try again"
          exit
        fi
      fi
    
      if test "x$PWLIBDIR" = "x/usr" -o "x$PWLIBDIR" = "x/usr/"; then
        PWLIBDIR="/usr/share/pwlib"
        PWLIB_INCDIR="/usr/include"
    
        if test "x$LIB64" != "x"; then
          PWLIB_LIBDIR="/usr/lib64"
        else
          PWLIB_LIBDIR="/usr/lib"
        fi
    
      fi
      if test "x$PWLIBDIR" = "x/usr/local" -o "x$PWLIBDIR" = "x/usr/"; then
        PWLIBDIR="/usr/local/share/pwlib"
        PWLIB_INCDIR="/usr/local/include"
    
        if test "x$LIB64" != "x"; then
          PWLIB_LIBDIR="/usr/local/lib64"
        else
          PWLIB_LIBDIR="/usr/local/lib"
        fi
    
      fi
    
      if test "${PWLIB_INCDIR:-unset}" = "unset"; then
        PWLIB_INCDIR="${PWLIBDIR}/include"
      fi
      if test "${PWLIB_LIBDIR:-unset}" = "unset"; then
        PWLIB_LIBDIR="${PWLIBDIR}/lib"
      fi
    
      AC_SUBST([PWLIBDIR])
      AC_SUBST([PWLIB_INCDIR])
      AC_SUBST([PWLIB_LIBDIR])
    fi
    
      AC_LANG_POP([C++])
    
    ])
    
    
    AC_DEFUN(
    [AST_CHECK_OPENH323_PLATFORM], [
    PWLIB_OSTYPE=
    case "$host_os" in
      linux*)          PWLIB_OSTYPE=linux ;
      		;;
      freebsd* )       PWLIB_OSTYPE=FreeBSD ;
      		;;
      openbsd* )       PWLIB_OSTYPE=OpenBSD ;
    				   ENDLDLIBS="-lossaudio" ;
    		;;
      netbsd* )        PWLIB_OSTYPE=NetBSD ;
    				   ENDLDLIBS="-lossaudio" ;
    		;;
      solaris* | sunos* ) PWLIB_OSTYPE=solaris ;
    		;;
      darwin* )	       PWLIB_OSTYPE=Darwin ;
    		;;
      beos*)           PWLIB_OSTYPE=beos ;
                       STDCCFLAGS="$STDCCFLAGS -D__BEOS__"
    		;;
      cygwin*)         PWLIB_OSTYPE=cygwin ;
    		;;
      mingw*)	       PWLIB_OSTYPE=mingw ;
    		           STDCCFLAGS="$STDCCFLAGS -mms-bitfields" ;
    		           ENDLDLIBS="-lwinmm -lwsock32 -lsnmpapi -lmpr -lcomdlg32 -lgdi32 -lavicap32" ;
    		;;
      * )		       PWLIB_OSTYPE="$host_os" ;
    		           AC_MSG_WARN("OS $PWLIB_OSTYPE not recognized - proceed with caution!") ;
    		;;
    esac
    
    PWLIB_MACHTYPE=
    case "$host_cpu" in
       x86 | i686 | i586 | i486 | i386 ) PWLIB_MACHTYPE=x86
                       ;;
    
       x86_64)	   PWLIB_MACHTYPE=x86_64 ;
    		   P_64BIT=1 ;
                       LIB64=1 ;
    		   ;;
    
       alpha | alphaev56 | alphaev6 | alphaev67 | alphaev7) PWLIB_MACHTYPE=alpha ;
    		   P_64BIT=1 ;
    		   ;;
    
       sparc )         PWLIB_MACHTYPE=sparc ;
    		   ;;
    
       powerpc )       PWLIB_MACHTYPE=ppc ;
    		   ;;
    
       ppc )           PWLIB_MACHTYPE=ppc ;
    		   ;;
    
       powerpc64 )     PWLIB_MACHTYPE=ppc64 ;
    		   P_64BIT=1 ;
                       LIB64=1 ;
    		   ;;
    
       ppc64 )         PWLIB_MACHTYPE=ppc64 ;
    		   P_64BIT=1 ;
                       LIB64=1 ;
    		   ;;
    
       ia64)	   PWLIB_MACHTYPE=ia64 ;
    		   P_64BIT=1 ;
    	  	   ;;
    
       s390x)	   PWLIB_MACHTYPE=s390x ;
    		   P_64BIT=1 ;
                       LIB64=1 ;
    		   ;;
    
       s390)	   PWLIB_MACHTYPE=s390 ;
    		   ;;
    
       * )		   PWLIB_MACHTYPE="$host_cpu";
    		   AC_MSG_WARN("CPU $PWLIB_MACHTYPE not recognized - proceed with caution!") ;;
    esac
    
    PWLIB_PLATFORM="${PWLIB_OSTYPE}_${PWLIB_MACHTYPE}"
    
    AC_SUBST([PWLIB_PLATFORM])
    ])
    
    
    AC_DEFUN(
    [AST_CHECK_OPENH323], [
    OPENH323_INCDIR=
    OPENH323_LIBDIR=
    
    AC_LANG_PUSH([C++])
    
    if test "${OPENH323DIR:-unset}" != "unset" ; then
    
      AC_CHECK_HEADER(${OPENH323DIR}/version.h, HAS_OPENH323=1, )
    
    fi
    if test "${HAS_OPENH323:-unset}" = "unset" ; then
    
      AC_CHECK_HEADER(${PWLIBDIR}/../openh323/version.h, OPENH323DIR="${PWLIBDIR}/../openh323"; HAS_OPENH323=1, )
    
      if test "${HAS_OPENH323:-unset}" != "unset" ; then
        OPENH323DIR="${PWLIBDIR}/../openh323"
    
        saved_cppflags="${CPPFLAGS}"
        CPPFLAGS="${CPPFLAGS} -I${PWLIB_INCDIR}/openh323 -I${PWLIB_INCDIR}"
        AC_CHECK_HEADER(${OPENH323DIR}/include/h323.h, , OPENH323_INCDIR="${PWLIB_INCDIR}/openh323"; OPENH323_LIBDIR="${PWLIB_LIBDIR}", [#include <ptlib.h>])
        CPPFLAGS="${saved_cppflags}"
    
        saved_cppflags="${CPPFLAGS}"
        CPPFLAGS="${CPPFLAGS} -I${HOME}/openh323/include -I${PWLIB_INCDIR}"
    
        AC_CHECK_HEADER(${HOME}/openh323/include/h323.h, HAS_OPENH323=1, )
    
        CPPFLAGS="${saved_cppflags}"
    
        if test "${HAS_OPENH323:-unset}" != "unset" ; then
          OPENH323DIR="${HOME}/openh323"
        else
    
          saved_cppflags="${CPPFLAGS}"
          CPPFLAGS="${CPPFLAGS} -I/usr/local/include/openh323 -I${PWLIB_INCDIR}"
    
          AC_CHECK_HEADER(/usr/local/include/openh323/h323.h, HAS_OPENH323=1, )
    
          CPPFLAGS="${saved_cppflags}"
    
          if test "${HAS_OPENH323:-unset}" != "unset" ; then
            OPENH323DIR="/usr/local/share/openh323"
            OPENH323_INCDIR="/usr/local/include/openh323"
    
            if test "x$LIB64" != "x"; then
              OPENH323_LIBDIR="/usr/local/lib64"
            else
              OPENH323_LIBDIR="/usr/local/lib"
            fi
    
            saved_cppflags="${CPPFLAGS}"
            CPPFLAGS="${CPPFLAGS} -I/usr/include/openh323 -I${PWLIB_INCDIR}"
            AC_CHECK_HEADER(/usr/include/openh323/h323.h, HAS_OPENH323=1, , [#include <ptlib.h>])
            CPPFLAGS="${saved_cppflags}"
    
            if test "${HAS_OPENH323:-unset}" != "unset" ; then
              OPENH323DIR="/usr/share/openh323"
              OPENH323_INCDIR="/usr/include/openh323"
    
              if test "x$LIB64" != "x"; then
                OPENH323_LIBDIR="/usr/lib64"
              else
                OPENH323_LIBDIR="/usr/lib"
              fi
    
            fi
          fi
        fi
      fi
    fi
    
    if test "${HAS_OPENH323:-unset}" != "unset" ; then
      if test "${OPENH323_INCDIR:-unset}" = "unset"; then
        OPENH323_INCDIR="${OPENH323DIR}/include"
      fi
      if test "${OPENH323_LIBDIR:-unset}" = "unset"; then
        OPENH323_LIBDIR="${OPENH323DIR}/lib"
      fi
    
    
      OPENH323_LIBDIR="`cd ${OPENH323_LIBDIR}; pwd`"
      OPENH323_INCDIR="`cd ${OPENH323_INCDIR}; pwd`"
      OPENH323DIR="`cd ${OPENH323DIR}; pwd`"
    
    
      AC_SUBST([OPENH323DIR])
      AC_SUBST([OPENH323_INCDIR])
      AC_SUBST([OPENH323_LIBDIR])
    fi
    
      AC_LANG_POP([C++])
    
    ])
    
    
    AC_DEFUN(
    [AST_CHECK_PWLIB_VERSION], [
    	if test "${HAS_$2:-unset}" != "unset"; then
    
    		$2_VERSION=`grep "$2_VERSION" ${$2_INCDIR}/$3 | sed -e 's/[[[:space:]]]\{1,\}/ /g' | cut -f3 -d ' ' | sed -e 's/"//g'`
    
    		$2_MAJOR_VERSION=`echo ${$2_VERSION} | cut -f1 -d.`
    		$2_MINOR_VERSION=`echo ${$2_VERSION} | cut -f2 -d.`
    		$2_BUILD_NUMBER=`echo ${$2_VERSION} | cut -f3 -d.`
    		let $2_VER=${$2_MAJOR_VERSION}*10000+${$2_MINOR_VERSION}*100+${$2_BUILD_NUMBER}
    		let $2_REQ=$4*10000+$5*100+$6
    
    		AC_MSG_CHECKING(if $1 version ${$2_VERSION} is compatible with chan_h323)
    		if test ${$2_VER} -lt ${$2_REQ}; then
    			AC_MSG_RESULT(no)
    			unset HAS_$2
    		else
    			AC_MSG_RESULT(yes)
    		fi
    	fi
    ])
    
    
    AC_DEFUN(
    [AST_CHECK_PWLIB_BUILD], [
    	if test "${HAS_$2:-unset}" != "unset"; then
    	   AC_MSG_CHECKING($1 installation validity)
    
    	   saved_cppflags="${CPPFLAGS}"
    	   saved_libs="${LIBS}"
    
    	   if test "${$2_LIB:-unset}" != "unset"; then
    	      LIBS="${LIBS} ${$2_LIB} $7"
    	   else
        	      LIBS="${LIBS} -L${$2_LIBDIR} -l${PLATFORM_$2} $7"
    	   fi
    
    	   CPPFLAGS="${CPPFLAGS} -I${$2_INCDIR} $6"
    
    	   AC_LANG_PUSH([C++])
    
    	   AC_LINK_IFELSE(
    		[AC_LANG_PROGRAM([$4],[$5])],
    		[	AC_MSG_RESULT(yes) 
    			ac_cv_lib_$2="yes" 
    		],
    		[	AC_MSG_RESULT(no) 
    			ac_cv_lib_$2="no" 
    		]
    		)
    
    	   AC_LANG_POP([C++])
    
    	   LIBS="${saved_libs}"
    	   CPPFLAGS="${saved_cppflags}"
    
    	   if test "${ac_cv_lib_$2}" = "yes"; then
    
    	      if test "${$2_LIB:-undef}" = "undef"; then
    	         if test "${$2_LIBDIR}" != "" -a "${$2_LIBDIR}" != "/usr/lib"; then
    	            $2_LIB="-L${$2_LIBDIR} -l${PLATFORM_$2}"
    	         else
    	            $2_LIB="-l${PLATFORM_$2}"
    	         fi
    
    	      fi
    	      if test "${$2_INCDIR}" != "" -a "${$2_INCDIR}" != "/usr/include"; then
    	         $2_INCLUDE="-I${$2_INCDIR}"
    	      fi
    	   	  PBX_$2=1
    	   	  AC_DEFINE([HAVE_$2], 1, [$3])
    	   fi
    	fi
    ])
    
    AC_DEFUN(
    [AST_CHECK_OPENH323_BUILD], [
    	if test "${HAS_OPENH323:-unset}" != "unset"; then
    		AC_MSG_CHECKING(OpenH323 build option)
    		OPENH323_SUFFIX=
    
    		prefixes="h323_${PWLIB_PLATFORM}_ h323_ openh323"
    		for pfx in $prefixes; do
    			files=`ls -l ${OPENH323_LIBDIR}/lib${pfx}*.so* 2>/dev/null`
    			libfile=
    			if test -n "$files"; then
    				for f in $files; do
    					if test -f $f -a ! -L $f; then
    						libfile=`basename $f`
    						break;
    					fi
    				done
    			fi
    			if test -n "$libfile"; then
    				OPENH323_PREFIX=$pfx
    				break;
    			fi
    		done
    
    		if test "${libfile:-unset}" != "unset"; then
    
    			OPENH323_SUFFIX=`eval "echo ${libfile} | sed -e 's/lib${OPENH323_PREFIX}\(@<:@^.@:>@*\)\..*/\1/'"`
    
    		fi
    		case "${OPENH323_SUFFIX}" in
    			n)
    				OPENH323_BUILD="notrace";;
    			r)
    				OPENH323_BUILD="opt";;
    			d)
    				OPENH323_BUILD="debug";;
    			*)
    
    				if test "${OPENH323_PREFIX:-undef}" = "openh323"; then
    					notrace=`eval "grep NOTRACE ${OPENH323DIR}/openh323u.mak | grep = | sed -e 's/@<:@A-Z0-9_@:>@*@<:@ 	@:>@*=@<:@ 	@:>@*//'"`
    					if test "x$notrace" = "x"; then
    						notrace="0"
    					fi
    					if test "$notrace" -ne 0; then
    						OPENH323_BUILD="notrace"
    					else
    						OPENH323_BUILD="opt"
    					fi
    					OPENH323_LIB="-l${OPENH323_PREFIX}"
    				else
    					OPENH323_BUILD="notrace"
    				fi
    				;;
    
    		esac
    		AC_MSG_RESULT(${OPENH323_BUILD})
    
    		AC_SUBST([OPENH323_SUFFIX])
    		AC_SUBST([OPENH323_BUILD])
    	fi
    ])
    
    
    
    # AST_FUNC_FORK
    # -------------
    AN_FUNCTION([fork],  [AST_FUNC_FORK])
    AN_FUNCTION([vfork], [AST_FUNC_FORK])
    AC_DEFUN([AST_FUNC_FORK],
    [AC_REQUIRE([AC_TYPE_PID_T])dnl
    AC_CHECK_HEADERS(vfork.h)
    AC_CHECK_FUNCS(fork vfork)
    if test "x$ac_cv_func_fork" = xyes; then
      _AST_FUNC_FORK
    else
      ac_cv_func_fork_works=$ac_cv_func_fork
    fi
    if test "x$ac_cv_func_fork_works" = xcross; then
      case $host in
    
        *-*-amigaos* | *-*-msdosdjgpp* | *-*-uclinux* | *-*-linux-uclibc* )
    
          # Override, as these systems have only a dummy fork() stub
          ac_cv_func_fork_works=no
          ;;
        *)
          ac_cv_func_fork_works=yes
          ;;
      esac
      AC_MSG_WARN([result $ac_cv_func_fork_works guessed because of cross compilation])
    fi
    ac_cv_func_vfork_works=$ac_cv_func_vfork
    if test "x$ac_cv_func_vfork" = xyes; then
      _AC_FUNC_VFORK
    fi;
    if test "x$ac_cv_func_fork_works" = xcross; then
      ac_cv_func_vfork_works=$ac_cv_func_vfork
      AC_MSG_WARN([result $ac_cv_func_vfork_works guessed because of cross compilation])
    fi
    
    if test "x$ac_cv_func_vfork_works" = xyes; then
      AC_DEFINE(HAVE_WORKING_VFORK, 1, [Define to 1 if `vfork' works.])
    else
      AC_DEFINE(vfork, fork, [Define as `fork' if `vfork' does not work.])
    fi
    if test "x$ac_cv_func_fork_works" = xyes; then
      AC_DEFINE(HAVE_WORKING_FORK, 1, [Define to 1 if `fork' works.])
    fi
    ])# AST_FUNC_FORK
    
    
    # _AST_FUNC_FORK
    # -------------
    AC_DEFUN([_AST_FUNC_FORK],
      [AC_CACHE_CHECK(for working fork, ac_cv_func_fork_works,
        [AC_RUN_IFELSE(
          [AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],
    	[
    	  /* By Ruediger Kuhlmann. */
    	  return fork () < 0;
    	])],
          [ac_cv_func_fork_works=yes],
          [ac_cv_func_fork_works=no],
          [ac_cv_func_fork_works=cross])])]
    )# _AST_FUNC_FORK
    
    
    # AST_PROG_LD
    # ----------
    # find the pathname to the GNU or non-GNU linker
    AC_DEFUN([AST_PROG_LD],
    [AC_ARG_WITH([gnu-ld],
        [AC_HELP_STRING([--with-gnu-ld],
    	[assume the C compiler uses GNU ld @<:@default=no@:>@])],
        [test "$withval" = no || with_gnu_ld=yes],
        [with_gnu_ld=no])
    
    AC_REQUIRE([AST_PROG_SED])dnl
    
    AC_REQUIRE([AC_PROG_CC])dnl
    AC_REQUIRE([AC_CANONICAL_HOST])dnl
    AC_REQUIRE([AC_CANONICAL_BUILD])dnl
    ac_prog=ld
    if test "$GCC" = yes; then
      # Check if gcc -print-prog-name=ld gives a path.
      AC_MSG_CHECKING([for ld used by $CC])
      case $host in
      *-*-mingw*)
        # gcc leaves a trailing carriage return which upsets mingw
        ac_prog=`($CC -print-prog-name=ld) 2>&5 | tr -d '\015'` ;;
      *)
        ac_prog=`($CC -print-prog-name=ld) 2>&5` ;;
      esac
      case $ac_prog in
        # Accept absolute paths.
        [[\\/]]* | ?:[[\\/]]*)
          re_direlt='/[[^/]][[^/]]*/\.\./'
          # Canonicalize the pathname of ld
          ac_prog=`echo $ac_prog| $SED 's%\\\\%/%g'`
          while echo $ac_prog | grep "$re_direlt" > /dev/null 2>&1; do
    	ac_prog=`echo $ac_prog| $SED "s%$re_direlt%/%"`
          done
          test -z "$LD" && LD="$ac_prog"
          ;;
      "")
        # If it fails, then pretend we aren't using GCC.
        ac_prog=ld
        ;;
      *)
        # If it is relative, then search for the first ld in PATH.
        with_gnu_ld=unknown
        ;;
      esac
    elif test "$with_gnu_ld" = yes; then
      AC_MSG_CHECKING([for GNU ld])
    else
      AC_MSG_CHECKING([for non-GNU ld])
    fi
    AC_CACHE_VAL(lt_cv_path_LD,
    [if test -z "$LD"; then
      lt_save_ifs="$IFS"; IFS=$PATH_SEPARATOR
      for ac_dir in $PATH; do
        IFS="$lt_save_ifs"
        test -z "$ac_dir" && ac_dir=.
        if test -f "$ac_dir/$ac_prog" || test -f "$ac_dir/$ac_prog$ac_exeext"; then
          lt_cv_path_LD="$ac_dir/$ac_prog"
          # Check to see if the program is GNU ld.  I'd rather use --version,
          # but apparently some variants of GNU ld only accept -v.
          # Break only if it was the GNU/non-GNU ld that we prefer.
          case `"$lt_cv_path_LD" -v 2>&1 </dev/null` in
          *GNU* | *'with BFD'*)
    	test "$with_gnu_ld" != no && break
    	;;
          *)
    	test "$with_gnu_ld" != yes && break
    	;;
          esac
        fi
      done
      IFS="$lt_save_ifs"
    else
      lt_cv_path_LD="$LD" # Let the user override the test with a path.
    fi])
    LD="$lt_cv_path_LD"
    if test -n "$LD"; then
      AC_MSG_RESULT($LD)
    else
      AC_MSG_RESULT(no)
    fi
    test -z "$LD" && AC_MSG_ERROR([no acceptable ld found in \$PATH])
    AST_PROG_LD_GNU
    ])# AST_PROG_LD
    
    
    # AST_PROG_LD_GNU
    # --------------
    AC_DEFUN([AST_PROG_LD_GNU],
    [AC_REQUIRE([AST_PROG_EGREP])dnl
    AC_CACHE_CHECK([if the linker ($LD) is GNU ld], lt_cv_prog_gnu_ld,
    [# I'd rather use --version here, but apparently some GNU lds only accept -v.
    case `$LD -v 2>&1 </dev/null` in
    *GNU* | *'with BFD'*)
      lt_cv_prog_gnu_ld=yes
      ;;
    *)
      lt_cv_prog_gnu_ld=no
      ;;
    esac])
    with_gnu_ld=$lt_cv_prog_gnu_ld
    ])# AST_PROG_LD_GNU
    
    # AST_PROG_EGREP
    # -------------
    m4_ifndef([AST_PROG_EGREP], [AC_DEFUN([AST_PROG_EGREP],
    [AC_CACHE_CHECK([for egrep], [ac_cv_prog_egrep],
       [if echo a | (grep -E '(a|b)') >/dev/null 2>&1
        then ac_cv_prog_egrep='grep -E'
        else ac_cv_prog_egrep='egrep'
        fi])
     EGREP=$ac_cv_prog_egrep
     AC_SUBST([EGREP])
    ])]) # AST_PROG_EGREP
    
    
    # AST_PROG_SED
    # -----------
    # Check for a fully functional sed program that truncates
    # as few characters as possible.  Prefer GNU sed if found.
    AC_DEFUN([AST_PROG_SED],
    [AC_CACHE_CHECK([for a sed that does not truncate output], ac_cv_path_SED,
        [dnl ac_script should not contain more than 99 commands (for HP-UX sed),
         dnl but more than about 7000 bytes, to catch a limit in Solaris 8 /usr/ucb/sed.
         ac_script=s/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa/bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb/
         for ac_i in 1 2 3 4 5 6 7; do
           ac_script="$ac_script$as_nl$ac_script"
         done
         echo "$ac_script" | sed 99q >conftest.sed
         $as_unset ac_script || ac_script=
         _AC_PATH_PROG_FEATURE_CHECK(SED, [sed gsed],
    	[_AC_FEATURE_CHECK_LENGTH([ac_path_SED], [ac_cv_path_SED],
    		["$ac_path_SED" -f conftest.sed])])])
     SED="$ac_cv_path_SED"
     AC_SUBST([SED])dnl
     rm -f conftest.sed
    ])# AST_PROG_SED
    
    dnl @synopsis ACX_PTHREAD([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
    dnl
    dnl @summary figure out how to build C programs using POSIX threads
    dnl
    dnl This macro figures out how to build C programs using POSIX threads.
    dnl It sets the PTHREAD_LIBS output variable to the threads library and
    dnl linker flags, and the PTHREAD_CFLAGS output variable to any special
    dnl C compiler flags that are needed. (The user can also force certain
    dnl compiler flags/libs to be tested by setting these environment
    dnl variables.)
    dnl
    dnl Also sets PTHREAD_CC to any special C compiler that is needed for
    dnl multi-threaded programs (defaults to the value of CC otherwise).
    dnl (This is necessary on AIX to use the special cc_r compiler alias.)
    dnl
    dnl NOTE: You are assumed to not only compile your program with these
    dnl flags, but also link it with them as well. e.g. you should link
    dnl with $PTHREAD_CC $CFLAGS $PTHREAD_CFLAGS $LDFLAGS ... $PTHREAD_LIBS
    dnl $LIBS
    dnl
    dnl If you are only building threads programs, you may wish to use
    dnl these variables in your default LIBS, CFLAGS, and CC:
    dnl
    dnl        LIBS="$PTHREAD_LIBS $LIBS"
    dnl        CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
    dnl        CC="$PTHREAD_CC"
    dnl
    dnl In addition, if the PTHREAD_CREATE_JOINABLE thread-attribute
    dnl constant has a nonstandard name, defines PTHREAD_CREATE_JOINABLE to
    dnl that name (e.g. PTHREAD_CREATE_UNDETACHED on AIX).
    dnl
    dnl ACTION-IF-FOUND is a list of shell commands to run if a threads
    dnl library is found, and ACTION-IF-NOT-FOUND is a list of commands to
    dnl run it if it is not found. If ACTION-IF-FOUND is not specified, the
    dnl default action will define HAVE_PTHREAD.
    dnl
    dnl Please let the authors know if this macro fails on any platform, or
    dnl if you have any other suggestions or comments. This macro was based
    dnl on work by SGJ on autoconf scripts for FFTW (www.fftw.org) (with
    dnl help from M. Frigo), as well as ac_pthread and hb_pthread macros
    dnl posted by Alejandro Forero Cuervo to the autoconf macro repository.
    dnl We are also grateful for the helpful feedback of numerous users.
    dnl
    dnl @category InstalledPackages
    dnl @author Steven G. Johnson <stevenj@alum.mit.edu>
    dnl @version 2006-05-29
    dnl @license GPLWithACException
    
    
    AC_DEFUN([ACX_PTHREAD],
    [
    
    AC_REQUIRE([AC_CANONICAL_HOST])
    AC_LANG_SAVE
    AC_LANG_C
    acx_pthread_ok=no
    
    # We used to check for pthread.h first, but this fails if pthread.h
    # requires special compiler flags (e.g. on True64 or Sequent).
    # It gets checked for in the link test anyway.
    
    # First of all, check if the user has set any of the PTHREAD_LIBS,
    # etcetera environment variables, and if threads linking works using
    # them:
    if test x"$PTHREAD_LIBS$PTHREAD_CFLAGS" != x; then
            save_CFLAGS="$CFLAGS"
            CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
            save_LIBS="$LIBS"
            LIBS="$PTHREAD_LIBS $LIBS"
            AC_MSG_CHECKING([for pthread_join in LIBS=$PTHREAD_LIBS with CFLAGS=$PTHREAD_CFLAGS])
            AC_TRY_LINK_FUNC(pthread_join, acx_pthread_ok=yes)
            AC_MSG_RESULT($acx_pthread_ok)
            if test x"$acx_pthread_ok" = xno; then
                    PTHREAD_LIBS=""
                    PTHREAD_CFLAGS=""
            fi
            LIBS="$save_LIBS"
            CFLAGS="$save_CFLAGS"
    fi
    
    # We must check for the threads library under a number of different
    # names; the ordering is very important because some systems
    # (e.g. DEC) have both -lpthread and -lpthreads, where one of the
    # libraries is broken (non-POSIX).
    
    # Create a list of thread flags to try.  Items starting with a "-" are
    # C compiler flags, and other items are library names, except for "none"
    # which indicates that we try without any flags at all, and "pthread-config"
    # which is a program returning the flags for the Pth emulation library.
    
    acx_pthread_flags="pthreads none -Kthread -kthread lthread -pthread -pthreads -mthreads pthread --thread-safe -mt pthread-config"
    
    # The ordering *is* (sometimes) important.  Some notes on the
    # individual items follow:
    
    # pthreads: AIX (must check this before -lpthread)
    # none: in case threads are in libc; should be tried before -Kthread and
    #       other compiler flags to prevent continual compiler warnings
    # -Kthread: Sequent (threads in libc, but -Kthread needed for pthread.h)
    # -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able)
    # lthread: LinuxThreads port on FreeBSD (also preferred to -pthread)
    # -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads)
    # -pthreads: Solaris/gcc
    # -mthreads: Mingw32/gcc, Lynx/gcc
    # -mt: Sun Workshop C (may only link SunOS threads [-lthread], but it
    #      doesn't hurt to check since this sometimes defines pthreads too;
    #      also defines -D_REENTRANT)
    #      ... -mt is also the pthreads flag for HP/aCC
    # pthread: Linux, etcetera
    # --thread-safe: KAI C++
    # pthread-config: use pthread-config program (for GNU Pth library)
    
    case "${host_cpu}-${host_os}" in
            *solaris*)
    
            # On Solaris (at least, for some versions), libc contains stubbed
            # (non-functional) versions of the pthreads routines, so link-based
            # tests will erroneously succeed.  (We need to link with -pthreads/-mt/
            # -lpthread.)  (The stubs are missing pthread_cleanup_push, or rather
            # a function called by this macro, so we could check for that, but
            # who knows whether they'll stub that too in a future libc.)  So,
            # we'll just look for -pthreads and -lpthread first:
    
            acx_pthread_flags="-pthreads pthread -mt -pthread $acx_pthread_flags"
            ;;
    esac