lm4tools fails to cross build from source, because the upstream
Makefiles hard code the build architecture pkg-config. Please consider
applying the attached patch to make pkg-config substitutable.

The patch will not make lm4tools cross buildable however as it uses
help2man, which is fundamentally incompatible with cross compilation.
Maybe you can write a real manual page?

Please close this bug even if you fix only the pkg-config issue.

Helmut