905a906,907
> if compareVersions(env['GCC_VERSION'], '4.7') >= 0:
> new_env.Append(CXXFLAGS='-Wdelete-non-virtual-dtor')
911c913,914
< new_env.Append(CXXFLAGS='-Wmissing-declarations')
---
> new_env.Append(CXXFLAGS=['-Wmissing-declarations',
> '-Wdelete-non-virtual-dtor'])