Install libnewlib-doc by entering the following commands in the terminal:
sudo apt update sudo apt install libnewlib-doc
Description:
C library and math library intended for use on embedded systems (doc)
Newlib is a C library and math library intended for use on embedded systems. It is a conglomeration of several library parts, all under free software licenses that make them easily usable on embedded products. . This package contains the newlib documentation.
Homepage: https://sourceware.org/newlib/
Version: 2.4.0.20160527-3
Section: universe/doc