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# ===========================================================================
# https://www.gnu.org/software/autoconf-archive/ax_prog_perl_version.html
# ===========================================================================
#
# SYNOPSIS
#
# AX_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) the macro will fail.
#
# Example:
#
# AC_PATH_PROG([PERL],[perl])
# AX_PROG_PERL_VERSION([5.8.0],[ ... ],[ ... ])
#
# This will check to make sure that the perl you have supports at least
# version 5.8.0.
#
# NOTE: This macro uses the $PERL variable to perform the check.
# AX_WITH_PERL can be used to set that variable prior to running this
# macro. The $PERL_VERSION variable will be valorized with the detected
# version.
#
# LICENSE
#
# Copyright (c) 2009 Francesco Salvestrini <salvestrini@users.sourceforge.net>
#
# Copying and distribution of this file, with or without modification, are
# permitted in any medium without royalty provided the copyright notice
# and this notice are preserved. This file is offered as-is, without any
# warranty.
#serial 13
AC_DEFUN([AX_PROG_PERL_VERSION],[
AC_REQUIRE([AC_PROG_SED])
AC_REQUIRE([AC_PROG_GREP])
AS_IF([test -n "$PERL"],[
ax_perl_version="$1"
AC_MSG_CHECKING([for perl version])
changequote(<<,>>)
perl_version=`$PERL --version 2>&1 \
| $SED -n -e '/This is perl/b inspect
b
: inspect
s/.* (\{0,1\}v\([0-9]*\.[0-9]*\.[0-9]*\))\{0,1\} .*/\1/;p'`
changequote([,])
AC_MSG_RESULT($perl_version)
AC_SUBST([PERL_VERSION],[$perl_version])
AX_COMPARE_VERSION([$ax_perl_version],[le],[$perl_version],[
:
$2
],[
:
$3
])
],[
AC_MSG_WARN([could not find the perl interpreter])
$3
])
])
|
