Write Dwarf2 data to Elf format

Write Dwarf2 data to Elf format

I need to write an elf file with debugging information. I have read up
about the elf structure and also the dwarf2. I have installed the
ELFToolChain. But I am not able to link it to the libraries in
elftoolchain no matter how I try to. I have tried to follow Writing DWARF
data to the ELF object file writeup but there is little information on how
to instantiate the Dwarf_Callback_Func_b and Dwarf_Handler error objects
that I am not able to make any progress.
Could anyone suggest examples on using the libdwarf api's or tools or
libraries which allow to write ELF files.
Thank You