This directory is used to collect information on which functions in the fwknop sources are never called when the test suite is executed. This assumes that fwknop has been compiled with test coverage support like this: $ CFLAGS="-O0 -fprofile-arcs -ftest-coverage" LDFLAGS="-fprofile-arcs" ./configure --prefix=/usr --sysconfdir=/etc $ make Or, just do: $ ./configure --enable-profile-coverage --prefix=/usr --sysconfdir=/etc Then the test suite can be executed with the --enable-profile-coverage-check argument so that functions that are never called can be seen: # ./test-fwknop.pl --enable-profile-coverage-check