libstdc++-9-pic-armhf-cross 9.1.0-8ubuntu1cross2 (amd64 binary) in ubuntu eoan

 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 armhf architecture, for use in cross-compile
 environment.