gdc-6-multilib-x86-64-linux-gnu 6.5.0-2ubuntu1~18.10cross1 (arm64 binary) in ubuntu cosmic

 This is the GNU D compiler, which compiles D on platforms supported by gcc.
 It uses the gcc backend to generate optimised code.
 .
 This is a dependency package, depending on development packages
 for the non-default multilib architecture(s).