libabsl-dev 0~20210324.2-4ubuntu1 (riscv64 binary) in ubuntu lunar

 Abseil is an open-source collection of C++ library code designed to augment the
 C++ standard library. The Abseil library code is collected from Google's C++
 codebase and has been extensively tested and used in production. In some cases,
 Abseil provides pieces missing from the C++ standard; in others, Abseil
 provides alternatives to the standard for special needs.
 .
 This package contains header files and other data necessary for developing with
 Abseil.