m4/ax_pkg_swig.m4

   1 # ===========================================================================
   2 #       https://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@web.de>
  35 #   Copyright (c) 2008 Alan W. Irwin
  36 #   Copyright (c) 2008 Rafael Laboissiere <rafael@laboissiere.net>
  37 #   Copyright (c) 2008 Andrew Collier
  38 #   Copyright (c) 2011 Murray Cumming <murrayc@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 <https://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 13
  67
  68 AC_DEFUN([AX_PKG_SWIG],[
  69         # Find path to the "swig" executable.
  70         AC_PATH_PROGS([SWIG],[swig swig3.0 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 ])