libstdc++-6-pic-sh4-cross 6.4.0-17ubuntu1cross1 (armhf 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 sh4 architecture, for use in cross-compile
 environment.