dnl Process this file with autoconf to produce a configure script.
## Copyright (C) 2001, 2004, 2006  Rafael Laboissiere
##
## This file is part of Octave-GPC
##
## Octave-GPC 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, or (at your option)
## any later version.
##
## Octave-GPC 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 Octave-GPC; see the file COPYING.  If not, write to the
## Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
## 02111-1307, USA.


dnl Initialize Autoconf and Automake
AC_INIT(octave-gpc, 0.1.6, [Rafael Laboissiere <rafael@laboissiere.net>])
AC_CONFIG_SRCDIR(octave-gpc.h)
AM_INIT_AUTOMAKE

dnl --with-* Options, Octave related
AC_ARG_WITH(octave,
  AC_HELP_STRING([--with-octave], [Specify the octave path (version 2.1.57
    or later)]),
  [OCTAVE=$withval])

AC_ARG_WITH(octdir,
  AC_HELP_STRING([--with-octdir], [Specify the path for installation of .oct
    files.  If not given, try to determine it by running Octave.
    (localoctfiledir in octave_config_info)]),
  [OCTDIR=$withval])

AC_ARG_WITH(mdir,
  AC_HELP_STRING([--with-mdir], [Specify the path for installation of .m
    files.  If not given, try to determine it by running Octave
    (localfcnfiledir in octave_config_info)]),
  [MDIR=$withval])

AC_ARG_WITH(mkoctfile,
  AC_HELP_STRING([--with-mkoctfile], [Specify the mkoctfile path (version
    2.1.52 or later)]),
  [MKOCTFILE=$withval])


dnl Checks for programs.
AC_PROG_CC
AC_PROG_CPP

CHECK_PROG(PERL, perl)
CHECK_PROG(OCTAVE, octave)
CHECK_PROG(MKOCTFILE, mkoctfile)

dnl Check minimum Octave version
OCTAVE_CONFIG_INFO(OCTVER, version)
AC_MSG_CHECKING(for Octave version)
AC_MSG_RESULT($OCTVER)
[if echo "$OCTVER" | \
     perl -ne '/([0-9]+)\.([0-9]+)\.([0-9]+)/; \
               exit 1 if ($1>=2 and $2>=1 and $3>=57); exit 0' ; then]
  AC_MSG_ERROR(version of octave must be 2.1.57 or later)
fi

dnl Installation directories for Octave-GPC files
OCTAVE_CONFIG_INFO(OCTDIR, localoctfiledir)
OCTAVE_CONFIG_INFO(MDIR, localfcnfiledir)


dnl Check minimum mkoctfile version
AC_MSG_CHECKING(for version of mkoctfile >= 2.1)
AC_MSG_RESULT($MKOCTFILE)
[if perl -ne \
   'if(/INCFLAGS/){/octave-([0-9]+)\.([0-9]+)/; \
    exit 1 if ($1>=2 and $2>=1); exit 0}' \
   < $MKOCTFILE ; then]
  AC_MSG_RESULT(no)
  AC_MSG_ERROR(version of mkoctfile must be 2.1 or later)
fi


dnl Checks for libraries.
AC_CHECK_LIB(gpcl, gpc_polygon_clip, [],
  [AC_MSG_ERROR(the gpc library must be available in the system)])


dnl Substitution variables
AC_SUBST(OCTDIR)
AC_SUBST(MDIR)


dnl Output files
AC_CONFIG_FILES(Makefile)
AC_OUTPUT