usbselfserial is a header-only C++ library for USB serial communication without inbuilt OS drivers.
It gives an operating system without USB serial support (like iOS) the ability to use a USB serial adapter.

usbselfserial is currently very experimental.
It's undocumented and only supports CDC ACM and CH34X devices at the moment (but please feel free to PR a new driver)
While it does work, it's definitely not production ready at the moment!

To compile the example, you just need libusb and a C++11 capable compiler.

• Ubuntu / Debian:

sudo apt-get install libusb-1.0-0-dev pkg-config
g++ example.cpp -O2 `pkg-config --libs --cflags libusb-1.0` -lutil -lpthread -std=c++17 -o example

• macOS:

brew install libusb
g++ -std=c++11 -O2 -lusb example.cpp -o example

You might need to run the example as root so the device can be detached from the OS drivers.