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# ===========================================================================
# http://www.gnu.org/software/autoconf-archive/ax_pkg_swig.html
# ===========================================================================
#
# SYNOPSIS
#
# AX_PKG_SWIG([major.minor.micro], [action-if-found], [action-if-not-found])
#
# DESCRIPTION
#
# This macro searches for a SWIG installation on your system. If found,
# then SWIG is AC_SUBST'd; if not found, then $SWIG is empty. If SWIG is
# found, then SWIG_LIB is set to the SWIG library path, and AC_SUBST'd.
#
# You can use the optional first argument to check if the version of the
# available SWIG is greater than or equal to the value of the argument. It
# should have the format: N[.N[.N]] (N is a number between 0 and 999. Only
# the first N is mandatory.) If the version argument is given (e.g.
# 1.3.17), AX_PKG_SWIG checks that the swig package is this version number
# or higher.
#
# As usual, action-if-found is executed if SWIG is found, otherwise
# action-if-not-found is executed.
#
# In configure.in, use as:
#
# AX_PKG_SWIG(1.3.17, [], [ AC_MSG_ERROR([SWIG is required to build..]) ])
# AX_SWIG_ENABLE_CXX
# AX_SWIG_MULTI_MODULE_SUPPORT
# AX_SWIG_PYTHON
#
# LICENSE
#
# Copyright (c) 2008 Sebastian Huber <sebastian-huber@web.de>
# Copyright (c) 2008 Alan W. Irwin <irwin@beluga.phys.uvic.ca>
# Copyright (c) 2008 Rafael Laboissiere <rafael@laboissiere.net>
# Copyright (c) 2008 Andrew Collier <colliera@ukzn.ac.za>
# Copyright (c) 2011 Murray Cumming <murrayc@openismus.com>
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
# Free Software Foundation; either version 2 of the License, or (at your
# option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
# Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program. If not, see <http://www.gnu.org/licenses/>.
#
# As a special exception, the respective Autoconf Macro's copyright owner
# gives unlimited permission to copy, distribute and modify the configure
# scripts that are the output of Autoconf when processing the Macro. You
# need not follow the terms of the GNU General Public License when using
# or distributing such scripts, even though portions of the text of the
# Macro appear in them. The GNU General Public License (GPL) does govern
# all other use of the material that constitutes the Autoconf Macro.
#
# This special exception to the GPL applies to versions of the Autoconf
# Macro released by the Autoconf Archive. When you make and distribute a
# modified version of the Autoconf Macro, you may extend this special
# exception to the GPL to apply to your modified version as well.
#serial 8
AC_DEFUN([AX_PKG_SWIG],[
# Ubuntu has swig 2.0 as /usr/bin/swig2.0
AC_PATH_PROGS([SWIG],[swig swig2.0])
if test -z "$SWIG" ; then
m4_ifval([$3],[$3],[:])
elif test -n "$1" ; then
AC_MSG_CHECKING([SWIG version])
[swig_version=`$SWIG -version 2>&1 | grep 'SWIG Version' | sed 's/.*\([0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*\).*/\1/g'`]
AC_MSG_RESULT([$swig_version])
if test -n "$swig_version" ; then
# Calculate the required version number components
[required=$1]
[required_major=`echo $required | sed 's/[^0-9].*//'`]
if test -z "$required_major" ; then
[required_major=0]
fi
[required=`echo $required | sed 's/[0-9]*[^0-9]//'`]
[required_minor=`echo $required | sed 's/[^0-9].*//'`]
if test -z "$required_minor" ; then
[required_minor=0]
fi
[required=`echo $required | sed 's/[0-9]*[^0-9]//'`]
[required_patch=`echo $required | sed 's/[^0-9].*//'`]
if test -z "$required_patch" ; then
[required_patch=0]
fi
# Calculate the available version number components
[available=$swig_version]
[available_major=`echo $available | sed 's/[^0-9].*//'`]
if test -z "$available_major" ; then
[available_major=0]
fi
[available=`echo $available | sed 's/[0-9]*[^0-9]//'`]
[available_minor=`echo $available | sed 's/[^0-9].*//'`]
if test -z "$available_minor" ; then
[available_minor=0]
fi
[available=`echo $available | sed 's/[0-9]*[^0-9]//'`]
[available_patch=`echo $available | sed 's/[^0-9].*//'`]
if test -z "$available_patch" ; then
[available_patch=0]
fi
# Convert the version tuple into a single number for easier comparison.
# Using base 100 should be safe since SWIG internally uses BCD values
# to encode its version number.
required_swig_vernum=`expr $required_major \* 10000 \
\+ $required_minor \* 100 \+ $required_patch`
available_swig_vernum=`expr $available_major \* 10000 \
\+ $available_minor \* 100 \+ $available_patch`
if test $available_swig_vernum -lt $required_swig_vernum; then
AC_MSG_WARN([SWIG version >= $1 is required. You have $swig_version.])
SWIG=''
m4_ifval([$3],[$3],[])
else
AC_MSG_CHECKING([for SWIG library])
SWIG_LIB=`$SWIG -swiglib`
AC_MSG_RESULT([$SWIG_LIB])
m4_ifval([$2],[$2],[])
fi
else
AC_MSG_WARN([cannot determine SWIG version])
SWIG=''
m4_ifval([$3],[$3],[])
fi
fi
AC_SUBST([SWIG_LIB])
])
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