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      1 # ===========================================================================
      2 #        http://www.gnu.org/software/autoconf-archive/ax_pkg_swig.html
      3 # ===========================================================================
      4 #
      5 # SYNOPSIS
      6 #
      7 #   AX_PKG_SWIG([major.minor.micro], [action-if-found], [action-if-not-found])
      8 #
      9 # DESCRIPTION
     10 #
     11 #   This macro searches for a SWIG installation on your system. If found,
     12 #   then SWIG is AC_SUBST'd; if not found, then $SWIG is empty.  If SWIG is
     13 #   found, then SWIG_LIB is set to the SWIG library path, and AC_SUBST'd.
     14 #
     15 #   You can use the optional first argument to check if the version of the
     16 #   available SWIG is greater than or equal to the value of the argument. It
     17 #   should have the format: N[.N[.N]] (N is a number between 0 and 999. Only
     18 #   the first N is mandatory.) If the version argument is given (e.g.
     19 #   1.3.17), AX_PKG_SWIG checks that the swig package is this version number
     20 #   or higher.
     21 #
     22 #   As usual, action-if-found is executed if SWIG is found, otherwise
     23 #   action-if-not-found is executed.
     24 #
     25 #   In configure.in, use as:
     26 #
     27 #     AX_PKG_SWIG(1.3.17, [], [ AC_MSG_ERROR([SWIG is required to build..]) ])
     28 #     AX_SWIG_ENABLE_CXX
     29 #     AX_SWIG_MULTI_MODULE_SUPPORT
     30 #     AX_SWIG_PYTHON
     31 #
     32 # LICENSE
     33 #
     34 #   Copyright (c) 2008 Sebastian Huber <sebastian-huber (a] web.de>
     35 #   Copyright (c) 2008 Alan W. Irwin <irwin (a] beluga.phys.uvic.ca>
     36 #   Copyright (c) 2008 Rafael Laboissiere <rafael (a] laboissiere.net>
     37 #   Copyright (c) 2008 Andrew Collier <colliera (a] ukzn.ac.za>
     38 #   Copyright (c) 2011 Murray Cumming <murrayc (a] openismus.com>
     39 #
     40 #   This program is free software; you can redistribute it and/or modify it
     41 #   under the terms of the GNU General Public License as published by the
     42 #   Free Software Foundation; either version 2 of the License, or (at your
     43 #   option) any later version.
     44 #
     45 #   This program is distributed in the hope that it will be useful, but
     46 #   WITHOUT ANY WARRANTY; without even the implied warranty of
     47 #   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
     48 #   Public License for more details.
     49 #
     50 #   You should have received a copy of the GNU General Public License along
     51 #   with this program. If not, see <http://www.gnu.org/licenses/>.
     52 #
     53 #   As a special exception, the respective Autoconf Macro's copyright owner
     54 #   gives unlimited permission to copy, distribute and modify the configure
     55 #   scripts that are the output of Autoconf when processing the Macro. You
     56 #   need not follow the terms of the GNU General Public License when using
     57 #   or distributing such scripts, even though portions of the text of the
     58 #   Macro appear in them. The GNU General Public License (GPL) does govern
     59 #   all other use of the material that constitutes the Autoconf Macro.
     60 #
     61 #   This special exception to the GPL applies to versions of the Autoconf
     62 #   Macro released by the Autoconf Archive. When you make and distribute a
     63 #   modified version of the Autoconf Macro, you may extend this special
     64 #   exception to the GPL to apply to your modified version as well.
     65 
     66 #serial 8
     67 
     68 AC_DEFUN([AX_PKG_SWIG],[
     69         # Ubuntu has swig 2.0 as /usr/bin/swig2.0
     70         AC_PATH_PROGS([SWIG],[swig swig2.0])
     71         if test -z "$SWIG" ; then
     72                 m4_ifval([$3],[$3],[:])
     73         elif test -n "$1" ; then
     74                 AC_MSG_CHECKING([SWIG version])
     75                 [swig_version=`$SWIG -version 2>&1 | grep 'SWIG Version' | sed 's/.*\([0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*\).*/\1/g'`]
     76                 AC_MSG_RESULT([$swig_version])
     77                 if test -n "$swig_version" ; then
     78                         # Calculate the required version number components
     79                         [required=$1]
     80                         [required_major=`echo $required | sed 's/[^0-9].*//'`]
     81                         if test -z "$required_major" ; then
     82                                 [required_major=0]
     83                         fi
     84                         [required=`echo $required | sed 's/[0-9]*[^0-9]//'`]
     85                         [required_minor=`echo $required | sed 's/[^0-9].*//'`]
     86                         if test -z "$required_minor" ; then
     87                                 [required_minor=0]
     88                         fi
     89                         [required=`echo $required | sed 's/[0-9]*[^0-9]//'`]
     90                         [required_patch=`echo $required | sed 's/[^0-9].*//'`]
     91                         if test -z "$required_patch" ; then
     92                                 [required_patch=0]
     93                         fi
     94                         # Calculate the available version number components
     95                         [available=$swig_version]
     96                         [available_major=`echo $available | sed 's/[^0-9].*//'`]
     97                         if test -z "$available_major" ; then
     98                                 [available_major=0]
     99                         fi
    100                         [available=`echo $available | sed 's/[0-9]*[^0-9]//'`]
    101                         [available_minor=`echo $available | sed 's/[^0-9].*//'`]
    102                         if test -z "$available_minor" ; then
    103                                 [available_minor=0]
    104                         fi
    105                         [available=`echo $available | sed 's/[0-9]*[^0-9]//'`]
    106                         [available_patch=`echo $available | sed 's/[^0-9].*//'`]
    107                         if test -z "$available_patch" ; then
    108                                 [available_patch=0]
    109                         fi
    110                         # Convert the version tuple into a single number for easier comparison.
    111                         # Using base 100 should be safe since SWIG internally uses BCD values
    112                         # to encode its version number.
    113                         required_swig_vernum=`expr $required_major \* 10000 \
    114                             \+ $required_minor \* 100 \+ $required_patch`
    115                         available_swig_vernum=`expr $available_major \* 10000 \
    116                             \+ $available_minor \* 100 \+ $available_patch`
    117 
    118                         if test $available_swig_vernum -lt $required_swig_vernum; then
    119                                 AC_MSG_WARN([SWIG version >= $1 is required.  You have $swig_version.])
    120                                 SWIG=''
    121                                 m4_ifval([$3],[$3],[])
    122                         else
    123                                 AC_MSG_CHECKING([for SWIG library])
    124                                 SWIG_LIB=`$SWIG -swiglib`
    125                                 AC_MSG_RESULT([$SWIG_LIB])
    126                                 m4_ifval([$2],[$2],[])
    127                         fi
    128                 else
    129                         AC_MSG_WARN([cannot determine SWIG version])
    130                         SWIG=''
    131                         m4_ifval([$3],[$3],[])
    132                 fi
    133         fi
    134         AC_SUBST([SWIG_LIB])
    135 ])
    136