Install libsigx-2.0-doc by entering the following commands in the terminal:
sudo apt update sudo apt install libsigx-2.0-doc
Description:
interthread communication for C++ - reference documentation
This library is an interthread communication library for C++ on top of libsigc++ and glibmm. It provides dispatcher based interthread communication, typesafe functor adaptors to execute functions in the context of another thread, threadsafe wrappers for signals and connections, and deadlock detection for synchronous messages. . This package contains the reference documentation for libsigx, needed only if you wish to write software which uses it.
Homepage: http://triendl.info/sigx/
Version: 2.0.2-5ubuntu1
Section: universe/doc