Binary package “dpkg-cross” in ubuntu focal

tools for cross compiling Debian packages

 dpkg-cross is a tool for installing libraries and headers from
 packages which have not been converted for Multi-Arch to support
 cross compiling.
 .
 This package contains only the deprecated dpkg-cross binary. Future
 releases will drop the dpkg-cross and libdebian-dpkgcross-perl
 binary packages.