Install libnspr4-dev by entering the following commands in the terminal:
sudo apt update sudo apt install libnspr4-dev
Description:
Development files for the NetScape Portable Runtime library
This library provides platform independent non-GUI operating system facilities including: * threads, * thread synchronisation, * normal file I/O and network I/O, * interval timing and calendar time, * basic memory management (malloc and free), * shared library linking. . Install this package if you wish to develop your own programs using the NetScape Portable Runtime library.
Homepage: http://www.mozilla.org/projects/nspr/
Version: 2:4.18-1ubuntu1
Section: libdevel