Without the change the build fails on ncurses-6.3 as:
TextUI.cc: In member function 'void TextUI::drawui()':
TextUI.cc:312:34: error: format '%d' expects argument of type 'int',
but argument 2 has type 'time_t' {aka 'long int'} [-Werror=format]
312 | printw("%ds",ic->getIdleSeconds());
| ~^ ~~~~~~~~~~~~~~~~~~~~
| int time_t {aka long int}
| %ld
Says: #warning "_BSD_SOURCE and _SVID_SOURCE are deprecated, use _DEFAULT_SOURCE"
CC: #4803. There will likely appear more of these errors on Hydra in time.
tcptrack is a small libpcap based program (with ncurses UI) for live TCP
connection monitoring.
It seems upstream homepage is down, so download the source code from a
fedora server instead.