MPFR: a C library for multiple-precision floating-point computations with correct rounding.
Quickstart
Install the package
$ npm i @sagemath/mpfr
There's nothing you can directly do with this yet.
Build from source
You need to install emscripten. Then do
npm run build
This will download and build MPFR from source.
TODO
Automate running the test suite.
(See comments for the GMP package.)