* Update build-dependencies to permit tcl8.6. Closes:#818475.
* Replace ad-hocery with use of offsetof/typeof. Closes:#812718.
* Honour dpkg-architecture's DEB_HOST_GNU_TYPE, to fix cross-building.
* Update build-dependencies to permit tcl8.6. Closes:#818475.
* Replace ad-hocery with use of offsetof/typeof. Closes:#812718.
* Honour dpkg-architecture's DEB_HOST_GNU_TYPE, to fix cross-building.