The attached script reports C functions not flexed by unittests. It
needs a 'coverage' build and a run of the tests. Coverage data is then
passed to gcov and those functions with zero calls written to a text
file, grouped by source file.

It's also pretty ugly.

Reviews/suggestions are most welcome :)

I'm finishing a related script that patches the source with 'printf's,
so any false positives are easy to spot and it's clear when some action
or test exercises a previously untested C function. It already works,
but is much uglier then this one ;)