clearsilver-dev binary package in Ubuntu Focal s390x

 Clearsilver is a fast, powerful, and language-neutral HTML template system.
 In both static content sites and dynamic HTML applications, it
 provides a separation between presentation code and application logic which
 makes working with your project easier.
 .
 This package contains the C headers, the static library and the cstest binary
 for deverlopers.

Source package