libatomicbitvector-dev 0.0+git20200519.e295358-2 (riscv64 binary) in ubuntu groovy

 This header-only library encodes a bitvector class with size fixed at
 runtime. Atomic operations allow for concurrent access and modification
 of the bitset. Such a structure can help with coordinating parallel
 processing of a given fixed set of entities, and has the advantage of
 only requiring O(1) bit per entry.
 .
 The atomic_bv_t class is a straightforward extension of ConcurrentBitSet
 from Facebook's folly C++ library. It wraps the atomic type with a class
 that allows them to be copied, and these wrapped atomic types are then
 used to build a vector whose size is determined at runtime.