libstdc++6-armhf-cross 8-20180402-1ubuntu1cross2 (amd64 binary) in ubuntu bionic

 This package contains an additional runtime library for C++ programs
 built with the GNU compiler.
 .
 libstdc++-v3 is a complete rewrite from the previous libstdc++-v2, which
 was included up to g++-2.95. The first version of libstdc++-v3 appeared
 in g++-3.0.
 .
 This package contains files for armhf architecture, for use in cross-compile
 environment.