Link a C program against libbsd to use BSD utility functions$ gcc -o program program.c -lbsd
Include BSD-specific headers in your C code for functions like arc4random()$ cc -I/usr/local/opt/libbsd/include -L/usr/local/opt/libbsd/lib -o app app.c -lbsd
Check installed BSD utility function headers$ ls /usr/local/opt/libbsd/include/bsd/