unbound/ac_pkg_swig.m4

   1 # ===========================================================================
   2 #              http://autoconf-archive.cryp.to/ac_pkg_swig.html
   3 # ===========================================================================
   4 #
   5 # SYNOPSIS
   6 #
   7 #   AC_PROG_SWIG([major.minor.micro])
   8 #
   9 # DESCRIPTION
  10 #
  11 #   This macro searches for a SWIG installation on your system. If found you
  12 #   should call SWIG via $(SWIG). You can use the optional first argument to
  13 #   check if the version of the available SWIG is greater than or equal to
  14 #   the value of the argument. It should have the format: N[.N[.N]] (N is a
  15 #   number between 0 and 999. Only the first N is mandatory.)
  16 #
  17 #   If the version argument is given (e.g. 1.3.17), AC_PROG_SWIG checks that
  18 #   the swig package is this version number or higher.
  19 #
  20 #   In configure.in, use as:
  21 #
  22 #     AC_PROG_SWIG(1.3.17)
  23 #     SWIG_ENABLE_CXX
  24 #     SWIG_MULTI_MODULE_SUPPORT
  25 #     SWIG_PYTHON
  26 #
  27 # LAST MODIFICATION
  28 #
  29 #   2008-04-12
  30 #
  31 # COPYLEFT
  32 #
  33 #   Copyright (c) 2008 Sebastian Huber <sebastian-huber@web.de>
  34 #   Copyright (c) 2008 Alan W. Irwin <irwin@beluga.phys.uvic.ca>
  35 #   Copyright (c) 2008 Rafael Laboissiere <rafael@laboissiere.net>
  36 #   Copyright (c) 2008 Andrew Collier <colliera@ukzn.ac.za>
  37 #
  38 #   This program is free software; you can redistribute it and/or modify it
  39 #   under the terms of the GNU General Public License as published by the
  40 #   Free Software Foundation; either version 2 of the License, or (at your
  41 #   option) any later version.
  42 #
  43 #   This program is distributed in the hope that it will be useful, but
  44 #   WITHOUT ANY WARRANTY; without even the implied warranty of
  45 #   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
  46 #   Public License for more details.
  47 #
  48 #   You should have received a copy of the GNU General Public License along
  49 #   with this program. If not, see <http://www.gnu.org/licenses/>.
  50 #
  51 #   As a special exception, the respective Autoconf Macro's copyright owner
  52 #   gives unlimited permission to copy, distribute and modify the configure
  53 #   scripts that are the output of Autoconf when processing the Macro. You
  54 #   need not follow the terms of the GNU General Public License when using
  55 #   or distributing such scripts, even though portions of the text of the
  56 #   Macro appear in them. The GNU General Public License (GPL) does govern
  57 #   all other use of the material that constitutes the Autoconf Macro.
  58 #
  59 #   This special exception to the GPL applies to versions of the Autoconf
  60 #   Macro released by the Autoconf Macro Archive. When you make and
  61 #   distribute a modified version of the Autoconf Macro, you may extend this
  62 #   special exception to the GPL to apply to your modified version as well.
  63
  64 AC_DEFUN([AC_PROG_SWIG],[
  65         AC_PATH_PROG([SWIG],[swig])
  66         if test -z "$SWIG" ; then
  67                 AC_MSG_WARN([cannot find 'swig' program. You should look at http://www.swig.org])
  68                 SWIG='echo "Error: SWIG is not installed. You should look at http://www.swig.org" ; false'
  69         elif test -n "$1" ; then
  70                 AC_MSG_CHECKING([for SWIG version])
  71                 [swig_version=`$SWIG -version 2>&1 | grep 'SWIG Version' | sed 's/.*\([0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*\).*/\1/g'`]
  72                 AC_MSG_RESULT([$swig_version])
  73                 if test -n "$swig_version" ; then
  74                         # Calculate the required version number components
  75                         [required=$1]
  76                         [required_major=`echo $required | sed 's/[^0-9].*//'`]
  77                         if test -z "$required_major" ; then
  78                                 [required_major=0]
  79                         fi
  80                         [required=`echo $required | sed 's/[0-9]*[^0-9]//'`]
  81                         [required_minor=`echo $required | sed 's/[^0-9].*//'`]
  82                         if test -z "$required_minor" ; then
  83                                 [required_minor=0]
  84                         fi
  85                         [required=`echo $required | sed 's/[0-9]*[^0-9]//'`]
  86                         [required_patch=`echo $required | sed 's/[^0-9].*//'`]
  87                         if test -z "$required_patch" ; then
  88                                 [required_patch=0]
  89                         fi
  90                         # Calculate the available version number components
  91                         [available=$swig_version]
  92                         [available_major=`echo $available | sed 's/[^0-9].*//'`]
  93                         if test -z "$available_major" ; then
  94                                 [available_major=0]
  95                         fi
  96                         [available=`echo $available | sed 's/[0-9]*[^0-9]//'`]
  97                         [available_minor=`echo $available | sed 's/[^0-9].*//'`]
  98                         if test -z "$available_minor" ; then
  99                                 [available_minor=0]
 100                         fi
 101                         [available=`echo $available | sed 's/[0-9]*[^0-9]//'`]
 102                         [available_patch=`echo $available | sed 's/[^0-9].*//'`]
 103                         if test -z "$available_patch" ; then
 104                                 [available_patch=0]
 105                         fi
 106                         if test $available_major -ne $required_major \
 107                                 -o $available_minor -ne $required_minor \
 108                                 -o $available_patch -lt $required_patch ; then
 109                                 AC_MSG_WARN([SWIG version >= $1 is required.  You have $swig_version.  You should look at http://www.swig.org])
 110                                 SWIG='echo "Error: SWIG version >= $1 is required.  You have '"$swig_version"'.  You should look at http://www.swig.org" ; false'
 111                         else
 112                                 AC_MSG_NOTICE([SWIG executable is '$SWIG'])
 113                                 SWIG_LIB=`$SWIG -swiglib`
 114                                 AC_MSG_NOTICE([SWIG library directory is '$SWIG_LIB'])
 115                         fi
 116                 else
 117                         AC_MSG_WARN([cannot determine SWIG version])
 118                         SWIG='echo "Error: Cannot determine SWIG version.  You should look at http://www.swig.org" ; false'
 119                 fi
 120         fi
 121         AC_SUBST([SWIG_LIB])
 122 ])