libcrack2-dev

Package contains libraries, required by other applications as dependencies. Do not install separately.

pro-active password checker library - development files
Header files, static libraries, documentation, and symbolic links
developers using cracklib2 will need.
.
If you want to build software using cracklib2 you will need to
install this package. For developing Python based applications for
cracklib2 you need to install python-cracklib instead.