build system does not work with scons version 0.97.0d20070918-1

[Marc Schinnenburg]

This version of scons cannot create libraries with no input files and only dependencies to other libraries.

AttributeError: 'NoneType' object has no attribute 'name':
  File "/home/fiet/myOpenWNS/framework/library/SConstruct", line 7:
    execfile(os.path.join(cnSConsDir, "SConstruct"))
  File "/home/fiet/myOpenWNS/framework/buildSupport/SConstruct", line 333:
    configureEnvironment(env, configDir)
  File "/home/fiet/myOpenWNS/framework/buildSupport/SConstruct", line 153:
    LIBPATH = [os.path.join('build', buildSpecificDir, 'lib')])
  File "/usr/lib/scons/SCons/Environment.py", line 214:
    return apply(MethodWrapper.__call__, (self, target, source) + args, kw)
  File "/usr/lib/scons/SCons/Environment.py", line 178:
    return apply(self.method, nargs, kwargs)
  File "/usr/lib/scons/SCons/Builder.py", line 614:
    return self._execute(env, target, source, OverrideWarner(kw), ekw)
  File "/usr/lib/scons/SCons/Builder.py", line 548:
    source = self.src_builder_sources(env, source, overwarn)
  File "/usr/lib/scons/SCons/Builder.py", line 727:
    match_suffix = match_src_suffix(s.name)