1# =========================================================================== 2# https://www.gnu.org/software/autoconf-archive/ax_prog_perl_version.html 3# =========================================================================== 4# 5# SYNOPSIS 6# 7# AX_PROG_PERL_VERSION([VERSION],[ACTION-IF-TRUE],[ACTION-IF-FALSE]) 8# 9# DESCRIPTION 10# 11# Makes sure that perl supports the version indicated. If true the shell 12# commands in ACTION-IF-TRUE are executed. If not the shell commands in 13# ACTION-IF-FALSE are run. Note if $PERL is not set (for example by 14# running AC_CHECK_PROG or AC_PATH_PROG) the macro will fail. 15# 16# Example: 17# 18# AC_PATH_PROG([PERL],[perl]) 19# AX_PROG_PERL_VERSION([5.8.0],[ ... ],[ ... ]) 20# 21# This will check to make sure that the perl you have supports at least 22# version 5.8.0. 23# 24# NOTE: This macro uses the $PERL variable to perform the check. 25# AX_WITH_PERL can be used to set that variable prior to running this 26# macro. The $PERL_VERSION variable will be valorized with the detected 27# version. 28# 29# LICENSE 30# 31# Copyright (c) 2009 Francesco Salvestrini <salvestrini@users.sourceforge.net> 32# 33# Copying and distribution of this file, with or without modification, are 34# permitted in any medium without royalty provided the copyright notice 35# and this notice are preserved. This file is offered as-is, without any 36# warranty. 37 38#serial 13 39 40AC_DEFUN([AX_PROG_PERL_VERSION],[ 41 AC_REQUIRE([AC_PROG_SED]) 42 AC_REQUIRE([AC_PROG_GREP]) 43 44 AS_IF([test -n "$PERL"],[ 45 ax_perl_version="$1" 46 47 AC_MSG_CHECKING([for perl version]) 48 changequote(<<,>>) 49 perl_version=`$PERL --version 2>&1 \ 50 | $SED -n -e '/This is perl/b inspect 51b 52: inspect 53s/.* (\{0,1\}v\([0-9]*\.[0-9]*\.[0-9]*\))\{0,1\} .*/\1/;p'` 54 changequote([,]) 55 AC_MSG_RESULT($perl_version) 56 57 AC_SUBST([PERL_VERSION],[$perl_version]) 58 59 AX_COMPARE_VERSION([$ax_perl_version],[le],[$perl_version],[ 60 : 61 $2 62 ],[ 63 : 64 $3 65 ]) 66 ],[ 67 AC_MSG_WARN([could not find the perl interpreter]) 68 $3 69 ]) 70]) 71