libstdc++-8-pic-armel-cross 8.4.0-1ubuntu1~18.04cross2 (arm64 binary) in ubuntu bionic

 This is used to develop subsets of the libstdc++ shared libraries for
 use on custom installation floppies and in embedded systems.
 .
 Unless you are making one of those, you will not need this package.
 .
 This package contains files for armel architecture, for use in cross-compile
 environment.