dwarf2 debug library

Hi,

I am currently working on a library to generate debug information in
different formats and am interested in finding more about dwarf2
libraries.

I have taken a look at libdwarf (developed by sgi) and also gcc/gdb
which falls under LGPL and GPL licenses.  Are there any non-GPL'ed
dwarf2 reader/writer libraries available for use?

I was also wondering if there was a commercially available dwarf2
reader/writer library that could be purchased.

Thanks,
Anita