A small utility akin to nohup: quickly set up the signal block mask & signal
dispositions before executing another program.
nosig should be usable on any recent POSIX compliant system. C11 & POSIX/IEEE Std 1003.1-2008 are the current requirements.
There is no desire to port to any non-POSIX system (e.g. Windows).
Your C library will also have to support getopt_long via getopt.h.
All you need is a C11 compiler & GNU make.
Run make and you're done!