In data.hh, seeing an issue with using DWARFPP_BEGIN_NAMESPACE

[Starkeus]

In the data.hh, we use DWARFPP_BEGIN_NAMESPACE and it comes back with an error of :
libs/libelfin/dwarf/data.hh:11: error: unknown type name 'DWARFPP_BEGIN_NAMESPACE'

This is also the case with 'DWARFPP_END_NAMESPACE'
How was this fixed?