Binary package “libc6-dev-i386-amd64-cross” in ubuntu mantic

GNU C Library: 32-bit development libraries for AMD64 (for cross-compiling)

 This package was generated by dpkg-cross for cross compiling.
 .
 Contains the symlinks and object files needed to compile and link programs
 which use the standard C library. This is the 32bit version of the
 library, meant for AMD64 systems.