hwcalc-0.1.0 is not a library.
hwcalc
hwcalc, or hc, is an arbitrary bit witdth calculator.
Documentation
Refer to the man page at docs/man/hc.1, use e.g.
$ man -l docs/man/hc.1
Build
The Cargo package manager can be used to fetch dependencies and build hc:
$ cargo build --release
The resulting binary will be located at target/release/hc.
Install
The makefile has a rule for installing the hc binary and the man page:
# make install
There is also an uninstall rule:
# make uninstall