##### http://autoconf-archive.cryp.to/ac_prog_perl_version.html
#
# SYNOPSIS
#
# AC_PROG_PERL_VERSION(VERSION, [ACTION-IF-TRUE], [ACTION-IF-FALSE])
#
# DESCRIPTION
#
# Makes sure that perl supports the version indicated. If true the
# shell commands in ACTION-IF-TRUE are executed. If not the shell
# commands in ACTION-IF-FALSE are run. Note if $PERL is not set (for
# example by running AC_CHECK_PROG or AC_PATH_PROG),
# AC_CHECK_PROG(PERL, perl, perl) will be run.
#
# Example:
#
# AC_PROG_PERL_VERSION(5.6.0)
#
# This will check to make sure that the perl you have supports at
# least version 5.6.0.
#
# LAST MODIFICATION
#
# 2002-09-25
#
# COPYLEFT
#
# Copyright (c) 2002 Dean Povey <povey@wedgetail.com>
#
# Copying and distribution of this file, with or without
# modification, are permitted in any medium without royalty provided
# the copyright notice and this notice are preserved.
AC_DEFUN([AC_PROG_PERL_VERSION],[dnl
# Make sure we have perl
if test -z "$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