src file won't compile anymore

[Martin O]

I have attached a .zip with the src file and header.

It doesn't compile:

$ gcc igroup_maps.cpp
In file included from igroup_maps.cpp:4:
igroup_maps.h:27: error: expected init-declarator before "extern"
igroup_maps.h:27: error: expected `,' or `;' before "extern"

Invest an extra 2 seconds of effort & actually compile the code before asking other people to troubleshoot the slow compile problem.