Introduced VERSION and SOVERSION'ing of libraries.

CMakeModules/OsgMacroUtils.cmake

@@ -39,6 +39,10 @@ ENDMACRO(LINK_EXTERNAL TRGTNAME)
 
 MACRO(LINK_CORELIB_DEFAULT CORELIB_NAME)
     LINK_EXTERNAL(${CORELIB_NAME} ${OPENGL_LIBRARIES}) 
+    LINK_WITH_VARIABLES(${CORELIB_NAME} OPENTHREADS_LIBRARY)
+    IF(OPENSCENEGRAPH_SONAMES)
+      SET_TARGET_PROPERTIES(${CORELIB_NAME} PROPERTIES VERSION ${OPENSCENEGRAPH_VERSION} SOVERSION ${OPENSCENEGRAPH_SOVERSION})
+    ENDIF(OPENSCENEGRAPH_SONAMES)
 ENDMACRO(LINK_CORELIB_DEFAULT CORELIB_NAME)
 
 
@@ -118,7 +122,7 @@ MACRO(SETUP_PLUGIN PLUGIN_NAME)
         SET_TARGET_PROPERTIES(${TARGET_TARGETNAME} PROPERTIES DEBUG_POSTFIX "")
     ENDIF(NOT MSVC)
     SET_TARGET_PROPERTIES(${TARGET_TARGETNAME} PROPERTIES PROJECT_LABEL "${TARGET_LABEL}")
-
+ 
     SETUP_LINK_LIBRARIES()
 
 #the installation path are differentiated for win32 that install in bib versus other architecture that install in lib${LIB_POSTFIX}/${OSG_PLUGINS}