-AM_CONDITIONAL(USE_OSGVIEWER, test "x$enable_osgviewer" = "xyes")
-if test "x$enable_sdl" = "xyes"; then
- AC_DEFINE([PU_USE_SDL], 1, [Define to use SDL])
-else
- if test "x$enable_osgviewer" = "xyes"; then
- AC_DEFINE([ENABLE_OSGVIEWER], 1, [Define to use osgViewer in renderer])
- AC_DEFINE([PU_USE_NATIVE], 1, [Define to use native system])
- else
- AC_DEFINE([PU_USE_GLUT], 1, [Define to use glut])
- fi
+AM_CONDITIONAL(USE_GLUT, test "x$enable_glut" = "xyes")
+if test "x$enable_sdl" != "xyes" -a "x$enable_glut" != "xyes" -a "x$enable_osgviewer" != "xno"; then
+ enable_osgviewer="yes"
+fi
+if test \( "x$enable_osgviewer" = "xyes" \
+ -a \( "x$enable_sdl" = "xyes" -o "x$enable_glut" = "xyes" \) \) \
+ -o \( "x$enable_sdl" = "xyes" -a "x$enable_glut" = "xyes" \); then
+ echo " Only one of --enable-osgviewer, --enable-sdl, or --enable -glut may"
+ echo " be supplied."
+ exit