dnl @synopsis AC_PERL_MODULE_VERSION([MODULE VERSION], [ACTION-IF-TRUE], [ACTION-IF-FALSE])
dnl
dnl @summary Checks if the given list of 'Module Version' are avaiable
dnl
dnl Checks to see if the list of 'Module Version' are avaiable in the
dnl system. If all the modules in the list are avaiable ACTION-IF-TRUE
dnl is executed. Case one module is not avaiable ACTION-IF-FALSE is
dnl executed and the macro execution is aborted. NOTE: Perl is needed.
dnl
dnl Example:
dnl
dnl   AC_PERL_MODULE_VERSION(CGI::Test 0.104 CGI::Ajax 0.694, ,
dnl      AC_MSG_ERROR(Need some Perl modules))
dnl
dnl @category InstalledPackages
dnl @author Marco Gomes <mpglesi@gmail.com>
dnl @author Ruben Fonseca <fonseka@gmail.com>
dnl @version 2006-05-12
dnl @license AllPermissive

AC_DEFUN([AC_PERL_MODULE_VERSION],[dnl
ac_perl_list_modules="$1"
# Make sure we have perl
if test -z "$PERL"; then
AC_CHECK_PROG(PERL,perl,perl)
fi

# Check the number of arguments
args_num=`echo $ac_perl_list_modules | wc -w`
let "ckeck_args = $args_num % 2"
if test "$check_args" = "1" ; then
  AC_MSG_ERROR(syntax error)
else
  eval
fi

if test "x$PERL" != x; then
  ac_failed=0
  while test ${#ac_perl_list_modules} -gt 2 ; do
	module_name=`echo $ac_perl_list_modules | cut -d " " -f 1`
	module_version=`echo $ac_perl_list_modules | cut -d " " -f 2`
	ac_perl_list_modules=`echo $ac_perl_list_modules | cut -d " " -f 3-`
	AC_MSG_CHECKING(for perl module $module_name version $module_version)

	$PERL "-M$module_name" -e exit > /dev/null 2>&1
	if test $? -ne 0; then
	  AC_MSG_RESULT(no);
	  ac_failed=1
	  ac_perl_list_modules=""
	else
	  version=`$PERL "-M$module_name" -e 'print $'"$module_name::VERSION" 2>&1`
	  $PERL -e 'exit(shift cmp shift)' "$version" "$module_version"
	  if test $? -eq 0 -o $? -eq 1 ; then
	    AC_MSG_RESULT(ok);
	  else
	    AC_MSG_RESULT(no)
	    ac_failed=1
	    ac_perl_list_modules=""
	  fi
	fi;
  done

  if test "$ac_failed" = 0; then
    :
    $2
  else
    :
    $3
  fi
else
  AC_MSG_ERROR(could not find perl)
fi])dnl