tk9.1 fails to cross build from source. On the surface, it fails to find
harfbuzz. Underneath, unix/configure.ac hard codes the build
architecture pkg-config in a lot of places. I suggest rewriting it to
use PKG_CHECK_MODULES. As that macro uses AC_REQUIRE it should not be
used inside an if condition, so I am also replacing a pile of those by
AS_IF. The macro also carries out the version check on harfbuzz, so this
ends up deleting a pile of code. I hope you find this refactoring
acceptable. Please forward it upstream. Also please apply it to the
Debian package before making tk9.1 the default version in Debian.

Helmut

Hi Helmut,

Thank you for the bug report. I'll apply the patch and forward it upstream.
Tcl/Tk 9.1 is not going to be a default Tcl/Tk version in Debian at least until
duke. There's not many software developers that have ported their programs
to Tcl/Tk 9 yet.

Cheers!