Standalone GLIBC argument parsing library for systems without it
Standalone version of arguments parsing functions from GLIBC
argp-standalone$ gcc myprogram.c -o myprogram -largp$ ./configure --with-argp=/usr/local/opt/argp-standalone$ gcc -I/usr/local/opt/argp-standalone/include myprogram.c -L/usr/local/opt/argp-standalone/lib -largp -o myprogram