Index: toltcl/generic/CMakeLists.txt
===================================================================
--- toltcl/generic/CMakeLists.txt	(revision 4e9a723a797429770e55e60f7e06cfcbaa09dbc0)
+++ toltcl/generic/CMakeLists.txt	(revision 87ce00f16e5a827f1c30820c2e940155b6ee1d2c)
@@ -1,3 +1,6 @@
-add_definitions( -DTCL_THREADS )
+add_definitions( -DTCL_THREADS 
+  -D__TOLTCL_MAJOR_VERSION__=${TOLTCL_VERSION_MAJOR}
+  -D__TOLTCL_MINOR_VERSION__=${TOLTCL_VERSION_MINOR}
+
 include_directories( ${TCL_INCLUDE_PATH} ${TOL_INCLUDE_DIR} ${CMAKE_CURRENT_SOURCE_DIR} )