kig_version=0.10.7

kde_save_LIBS=$LIBS
LIBS="$LIBS -lm"
KDE_CHECK_FUNC_EXT(trunc)
LIBS="$kde_save_LIBS"

KDE_LANG_CPLUSPLUS

# this variable is set to true if we need to warn the user that Python
# scripting support has been disabled due to missing headers or libs
# or whatever..  It's not set if the user explicitly disabled python
# scripting ( "./configure --disable-kig-python-scripting" ).  We
# complain about this at the end of the ./configure script.  Check out
# configure.in.bot for the code..
kig_warn_about_disabling_python="no"

# this var is set to yes if we want to compile python scripting, and to 
# no otherwise
kig_enable_python_scripting="yes"

# this var is set to no if we want to disable support for compressed files
# (for compatibility reasons with kde 3.1)
kig_enable_compressed_files="yes"

AC_DEFUN([KIG_PYTHON_NOT_FOUND], [
  AC_MSG_WARN( 
    [[Kig needs the Python and Boost.Python libraries and their headers \
installed for its Python scripting support.  One of both was not \
found, or the versions were incompatible, and Python scripting will be disabled.]] );
  kig_warn_about_disabling_python="yes"
  kig_enable_python_scripting="no" ] )

AC_ARG_ENABLE( kig-python-scripting, 
  [  --disable-kig-python-scripting	Disable Kig Python Scripting support],
  [  kig_enable_python_scripting=$enableval ],
  [  kig_enable_python_scripting=yes] )

AC_ARG_ENABLE( kig-compressed-files, 
  [  --disable-kig-compressed-files	Disable Kig Compressed Files support],
  [  kig_enable_compressed_files=$enableval ],
  [  kig_enable_compressed_files=yes] )

dnl domi: we use some macro's by Ben Burton from the Regina program,
dnl to check for the availability of a good python+boost.python
dnl combination.  They are included here, the end is marked at the 
dnl bottom.  I have changed it only by removing some macro's, and by 
dnl making the other call KIG_PYTHON_NOT_FOUND instead of 
dnl REGINA_DO_NOT_COMPILE, and REGINA_WARN_*.
dnl
dnl    Regina - A Normal Surface Theory Calculator
dnl    Configure Script Macros
dnl
dnl    Copyright (c) 2002-2003, Ben Burton
dnl    For further details contact Ben Burton (bab@debian.org).
dnl
dnl    This file is free software; you can redistribute it and/or
dnl    modify it under the terms of the GNU General Public License as
dnl    published by the Free Software Foundation; either version 2 of the
dnl    License, or (at your option) any later version.
dnl
dnl    This file is distributed in the hope that it will be useful, but
dnl    WITHOUT ANY WARRANTY; without even the implied warranty of
dnl    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
dnl    General Public License for more details.
dnl
dnl    You should have received a copy of the GNU General Public
dnl    License along with this program; if not, write to the Free
dnl    Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
dnl    MA 02110-1301, USA.
dnl
dnl    Note that this copyright notice applies only to macros beginning
dnl    with REGINA_.  Other macros found in acinclude.m4 have been taken
dnl    from external sources; these macros are stored in separate files
dnl    in the admin/ subdirectory and copyright notices can be found in
dnl    these separate files (and in the comments provided with the macros
dnl    themselves).
dnl

dnl    -----------------------------------------------------------------
dnl
dnl                        Macros written for Regina
dnl
dnl    -----------------------------------------------------------------

dnl
dnl    REGINA_LIB_BOOST_PYTHON(TARGET-LIST, REQUIRED-BY)
dnl
dnl    Checks for a usable boost.python installation.
dnl    Issues a warning and adds <TARGET-LIST> (which may consist of
dnl    several targets) to $DO_NOT_COMPILE if boost.python is missing.
dnl
dnl    AC_SUBST()s the following variables:
dnl
dnl        BOOST_PYTHON_INCLUDES: The compiler flags required for
dnl                               building against boost.python,
dnl                               including flags for building against
dnl                               python itself.
dnl        BOOST_PYTHON_LIBS: The linker flags required for building
dnl                           against boost.python.
dnl        PYTHON_LIBS: The linker flags required for building against
dnl                     python itself.
dnl
dnl    AC_DEFINE()s the following variables:
dnl
dnl        HAVE_BOOST_PYTHON: Defined as 1 if we have a usable boost.python
dnl                           installation, or remains undefined otherwise.
dnl
dnl    Example: REGINA_LIB_BOOST_PYTHON(PYTHON, [the Python interface])
dnl
AC_DEFUN([REGINA_LIB_BOOST_PYTHON], [
  AC_LANG_PUSH(C++)
  KDE_CHECK_HEADERS([boost/shared_ptr.hpp], [
    __regina_py_save_cxxflags="$CXXFLAGS"
    __regina_py_save_ldflags="$LDFLAGS"
    __regina_py_save_libs="$LIBS"
    __regina_py_ok=0
    for pyver in python python2.6 python2.5 python2.4 python2.3 python2.2; do
      for incdir in "/usr/include/$pyver" "/usr/local/include/$pyver" \
          "/usr/$pyver/include" "/usr/local/$pyver/include" \
          "$prefix/include/$pyver" "$prefix/$pyver/include"; do
        CXXFLAGS="$__regina_py_save_cxxflags -I$incdir"
        LDFLAGS="$__regina_py_save_ldflags -shared"

        # Check for python includes.
        AC_TRY_COMPILE([
          #include <Python.h>
        ], [
          PyObject obj;
        ], [
          # Check for compatibility with boost.python.
          AC_MSG_CHECKING([for boost.python with $incdir/Python.h])
          AC_TRY_COMPILE([
            #include <boost/python.hpp>
            const char* greet() { return "Hello world!"; }
            BOOST_PYTHON_MODULE(hello) { boost::python::def("greet", greet); }
          ], [
            /* No main body. */
          ], [
            AC_MSG_RESULT([yes])
	
            # Check for -lpython.
            for pylib in "$pyver" python python2.6 python2.3 python2.2; do
              for pylibdir in "/usr/lib" "/usr/local/lib" "/usr/lib/$pyver/config" \
		"/usr/local/lib/$pyver/config"; do
		for extralibs in "" "-lpthread -lm -lutil -ldl"; do
                  AC_MSG_CHECKING([for $pylibdir/lib$pylib and $extralibs with $incdir/Python.h])
		  LDFLAGS="$__regina_py_save_ldflags -L$pylibdir"
		  LIBS="-l$pylib $extralibs"
		  AC_TRY_LINK([
		    #include <Python.h>
		  ], [
		    Py_Initialize(); Py_Finalize();
		  ], [
		    AC_MSG_RESULT([yes])
		    for bplib in "-lboost_python-mt" "-lboost_python-gcc-mt-1_32" "-lboost_python-gcc-mt-1_31" "-lboost_python-gcc-mt" "-lboost_python"; do
		      AC_MSG_CHECKING([compilation of a boost.python program with $bplib])
		      LDFLAGS="$__regina_py_save_ldflags -L$pylibdir"
		      LIBS="-l$pylib $bplib $extralibs"
		      AC_TRY_LINK([
			#include <boost/python.hpp>
			const char* greet() { return "Hello world!"; }
			BOOST_PYTHON_MODULE(hello) { boost::python::def("greet", greet); }
		      ], [
		        /* No main body. */
		      ], [
			AC_MSG_RESULT([yes])
			# And we're done!
			BOOST_PYTHON_INCLUDES="-I$incdir"
			BOOST_PYTHON_LIBS="$bplib"
			PYTHON_LIBS="-l$pylib $extralibs"
			PYTHON_LDFLAGS="-L$pylibdir"
			__regina_py_ok=1
		      ], [
			AC_MSG_RESULT([no])
		      ])
		      if test "$__regina_py_ok" = "1"; then break; fi
		    done
		  ], [
		    AC_MSG_RESULT([no])
		  ])
		  if test "$__regina_py_ok" = "1"; then break; fi
		done
	        if test "$__regina_py_ok" = "1"; then break; fi
              done
              if test "$__regina_py_ok" = "1"; then break; fi
            done
          ], [
            AC_MSG_RESULT([no])
          ])
        ])
        if test "$__regina_py_ok" = "1"; then break; fi
      done
      if test "$__regina_py_ok" = "1"; then break; fi
    done

    CXXFLAGS="$__regina_py_save_cxxflags"
    LDFLAGS="$__regina_py_save_ldflags"
    LIBS="$__regina_py_save_libs"

    if test "$__regina_py_ok" = "1"; then
      AC_DEFINE(HAVE_BOOST_PYTHON, 1,
        [Define to 1 if you have a usable boost.python installation.])
    else
      BOOST_PYTHON_INCLUDES=
      BOOST_PYTHON_LIBS=
      KIG_PYTHON_NOT_FOUND
    fi
  ], [
    KIG_PYTHON_NOT_FOUND
  ])
  AC_LANG_POP(C++)
  AC_SUBST(BOOST_PYTHON_INCLUDES)
  AC_SUBST(BOOST_PYTHON_LIBS)
  AC_SUBST(PYTHON_LDFLAGS)
  AC_SUBST(PYTHON_LIBS)
])

dnl This is the end of the macro's copied from Ben Burton's Regina
dnl program.

if test "x$kig_enable_python_scripting" != xno; then
  kig_enable_python_scripting="yes" # either yes or no..

  kig_save_CXXFLAGS="$CXXFLAGS"
  CXXFLAGS=`echo $CXXFLAGS | sed -e 's/-fno-exceptions//g'`
  REGINA_LIB_BOOST_PYTHON( PYTHON, Kig Python Scripting )
  CXXFLAGS="$kig_save_CXXFLAGS"
fi

if test "x$kig_enable_python_scripting" != xno; then
  AC_DEFINE( KIG_ENABLE_PYTHON_SCRIPTING, 1, [Defined if Kig Python scripting is enabled] )
fi

AM_CONDITIONAL(KIG_COMPILE_PYTHON_SCRIPTING, test x$kig_enable_python_scripting != xno)

if test "x$kig_enable_compressed_files" = xno; then
  CXXFLAGS="$CXXFLAGS -DKIG_NO_COMPRESSED_FILES"
fi

AC_SUBST( KIGVERSION, $kig_version )
AC_DEFINE_UNQUOTED( KIGVERSION, "$kig_version", [The current Kig version as a string] )

KDE_CHECK_HEADERS([ieeefp.h])

# apparently the KDE build system wants to see "dnl AC_OUTPUT( ... )",
# not a normal AC_OUTPUT
dnl AC_OUTPUT( kig/kig.lsm )
dnl AC_OUTPUT( kig/README )
dnl AC_OUTPUT( kig/package-kig.sh )
dnl AC_OUTPUT( kig/VERSION )