+AC_CHECK_PROG(DOXYGEN, doxygen, true, false)
+AM_CONDITIONAL(HAVE_DOXYGEN, $DOXYGEN)
+AC_SUBST(HAVE_DOXYGEN)
+
+dnl Let people disable the doxygen stuff.
+AC_ARG_ENABLE(docygen,
+ [ --enable-doxygen Use doxygen to build documentation (default=auto)],
+ [enable_doxygen="$enableval"],
+ [enable_doxygen=auto])
+
+if test x$enable_doxygen = xauto ; then
+ if test x$DOXYGEN = xtrue ; then
+ enable_doxygen=yes
+ else
+ enable_doxygen=no
+ fi
+fi
+
+dnl NOTE: We need to use a separate automake conditional for this
+dnl to make this work with the tarballs.
+AM_CONDITIONAL(ENABLE_DOXYGEN, test x$enable_doxygen = xyes)
+
+dnl Checks for Python
+AC_ARG_ENABLE(python,
+ [ --enable-python Enable Python language support (default=no).],
+ ,
+ [enable_python="no"])
+dnl AC_MSG_RESULT($enable_python)
+build_python=no
+if test "yes" = "$enable_python"; then
+ AM_PATH_PYTHON(2.0.0)
+ if test -n "$PYTHON"; then
+ AM_CHECK_PYTHON_HEADERS(,[AC_MSG_ERROR(could not find Python headers)])
+ build_python=yes;
+ fi
+ AC_CHECK_PROGS(SWIG, swig13)
+fi
+AM_CONDITIONAL(BUILD_PYTHON, test x$build_python = xyes)
+
+dnl Checks for vtk
+AC_ARG_ENABLE(vtk,
+ [ --enable-vtk Enable vtk extensions support (default=no).],
+ ,
+ [enable_vtk="no"])
+AM_CONDITIONAL(BUILD_VTK, test x$enable_vtk = xyes)
+