dnl Available from the GNU Autoconf Macro Archive at:
dnl http://www.gnu.org/software/ac-archive/htmldoc/ac_prog_perl_version.html
dnl
AC_DEFUN([AC_PROG_PERL_VERSION],[dnl
# Make sure we have perl
if test -z "$PERL"; then
AC_CHECK_PROG(PERL,perl,perl)
fi

# Check if version of Perl is sufficient
ac_perl_version="$1"

if test "x$PERL" != "x"; then
  AC_MSG_CHECKING(for perl version greater than or equal to $ac_perl_version)
  # NB: It would be nice to log the error if there is one, but we cannot rely
  # on autoconf internals
  $PERL -e "use $ac_perl_version;" > /dev/null 2>&1
  if test $? -ne 0; then
    AC_MSG_RESULT(no);
    $3
  else
    AC_MSG_RESULT(ok);
    $2
  fi
else
  AC_MSG_WARN(could not find perl)
fi
])dnl # AC_PROG_PERL_VERSION