as far as I can tell, the issue can simply be fixed by moving the files OS/unsupported/*-GNU into the folder OS/. At least, the package built successfully for me some days ago, but I did not yet take the time to report the bug.
Greetings, Paul
Am 28. November 2019 14:31:40 MEZ schrieb Samuel Thibault <sthibault@debian.org>:
Hello,
The exim4 package is currently failing to build from source on hurd-i386, and that'll pose strong issues, could somebody have a look?