SelectLibraryConfigurations: do not output identical configurations

If the debug and release libraries are the same (which usually means only one
of them was found) do not output the library as "optimized" and "debug", but
just as one plain library. At the end this means that the Find* output of the
avarage (Un*x) user will be much less cluttered.

Modules/SelectLibraryConfigurations.cmake

@@ -15,7 +15,6 @@
 # basename_LIBRARY and basename_LIBRARIES will take only the release values.
 
 #=============================================================================
-# Copyright 2009 Kitware, Inc.
 # Copyright 2009 Will Dicharry <[email protected]>
 # Copyright 2005-2009 Kitware, Inc.
 #
@@ -49,7 +48,8 @@ macro( select_library_configurations basename )
     # if only the debug version was found, set the release value to be the
     # debug value.
     _set_library_name( ${basename} DEBUG RELEASE )
-    if (${basename}_LIBRARY_DEBUG AND ${basename}_LIBRARY_RELEASE )
+    if (${basename}_LIBRARY_DEBUG AND ${basename}_LIBRARY_RELEASE AND
+           NOT ${basename}_LIBRARY_DEBUG STREQUAL ${basename}_LIBRARY_RELEASE)
         # if the generator supports configuration types or CMAKE_BUILD_TYPE
         # is set, then set optimized and debug options.
         if( CMAKE_CONFIGURATION_TYPES OR CMAKE_BUILD_TYPE )
@@ -65,7 +65,7 @@ macro( select_library_configurations basename )
             set( ${basename}_LIBRARY ${${basename}_LIBRARY_RELEASE} )
             set( ${basename}_LIBRARIES ${${basename}_LIBRARY_RELEASE} )
         endif( CMAKE_CONFIGURATION_TYPES OR CMAKE_BUILD_TYPE )
-    endif( ${basename}_LIBRARY_DEBUG AND ${basename}_LIBRARY_RELEASE )
+    endif()
 
     set( ${basename}_LIBRARY ${${basename}_LIBRARY} CACHE FILEPATH 
         "The ${basename} library" )
@@ -79,4 +79,3 @@ macro( select_library_configurations basename )
         ${basename}_LIBRARY_DEBUG
     )
 endmacro( select_library_configurations )
-