1 # ===========================================================================
2 # http://www.gnu.org/software/autoconf-archive/ax_prog_perl_version.html
3 # ===========================================================================
7 # AX_PROG_PERL_VERSION([VERSION],[ACTION-IF-TRUE],[ACTION-IF-FALSE])
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.
18 # AC_PATH_PROG([PERL],[perl])
19 # AX_PROG_PERL_VERSION([5.8.0],[ ... ],[ ... ])
21 # This will check to make sure that the perl you have supports at least
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 $PERL_VERSION variable will be valorized with the detected
31 # Copyright (c) 2009 Francesco Salvestrini <salvestrini@users.sourceforge.net>
33 # Copying and distribution of this file, with or without modification, are
34 # permitted in any medium without royalty provided the copyright notice
35 # and this notice are preserved. This file is offered as-is, without any
40 AC_DEFUN([AX_PROG_PERL_VERSION],[
41 AC_REQUIRE([AC_PROG_SED])
42 AC_REQUIRE([AC_PROG_GREP])
44 AS_IF([test -n "$PERL"],[
47 AC_MSG_CHECKING([for perl version])
49 perl_version=`$PERL --version 2>&1 \
50 | $SED -n -e '/This is perl/b inspect
53 s/.* (\{0,1\}v\([0-9]*\.[0-9]*\.[0-9]*\))\{0,1\} .*/\1/;p'`
55 AC_MSG_RESULT($perl_version)
57 AC_SUBST([PERL_VERSION],[$perl_version])
59 AX_COMPARE_VERSION([$ax_perl_version],[le],[$perl_version],[
67 AC_MSG_WARN([could not find the perl interpreter])