1# ===========================================================================
2#  https://www.gnu.org/software/autoconf-archive/ax_prog_python_version.html
3# ===========================================================================
4#
5# SYNOPSIS
6#
7#   AX_PROG_PYTHON_VERSION([VERSION],[ACTION-IF-TRUE],[ACTION-IF-FALSE])
8#
9# DESCRIPTION
10#
11#   Makes sure that python 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 $PYTHON 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([PYTHON],[python])
19#     AX_PROG_PYTHON_VERSION([2.4.4],[ ... ],[ ... ])
20#
21#   This will check to make sure that the python you have supports at least
22#   version 2.4.4.
23#
24#   NOTE: This macro uses the $PYTHON variable to perform the check.
25#   AX_WITH_PYTHON can be used to set that variable prior to running this
26#   macro. The $PYTHON_VERSION variable will be valorized with the detected
27#   version.
28#
29# LICENSE
30#
31#   Copyright (c) 2009 Francesco Salvestrini <salvestrini@users.sourceforge.net>
32#
33#   Copying and distribution of this file, with or without modification, are
34#   permitted in any medium without royalty provided the copyright notice
35#   and this notice are preserved. This file is offered as-is, without any
36#   warranty.
37
38#serial 12
39
40AC_DEFUN([AX_PROG_PYTHON_VERSION],[
41    AC_REQUIRE([AC_PROG_SED])
42    AC_REQUIRE([AC_PROG_GREP])
43
44    AS_IF([test -n "$PYTHON"],[
45        ax_python_version="$1"
46
47        AC_MSG_CHECKING([for python version])
48        changequote(<<,>>)
49        python_version=`$PYTHON -V 2>&1 | $GREP "^Python " | $SED -e 's/^.* \([0-9]*\.[0-9]*\.[0-9]*\)/\1/'`
50        changequote([,])
51        AC_MSG_RESULT($python_version)
52
53	AC_SUBST([PYTHON_VERSION],[$python_version])
54
55        AX_COMPARE_VERSION([$ax_python_version],[le],[$python_version],[
56	    :
57            $2
58        ],[
59	    :
60            $3
61        ])
62    ],[
63        AC_MSG_WARN([could not find the python interpreter])
64        $3
65    ])
66])
67