Compiling ==> 'makesdna.c'
Linking program ==> 'makesdna'
../build/darwin/makesdna /Users/xxx/Development/BlenderB/build/darwin/source/blender/makesdna/intern/dna.c
Running makesdna at debug level 0
        Program version: $Id: makesdna.c 10574 2007-04-24 14:52:35Z ton $
Sizeerror in struct: UserDef (add 4 bytes)
scons: *** [/Users/xxx/Development/BlenderB/build/darwin/source/blender/makesdna/intern/dna.c] Error 1
scons: building terminated because of errors.