dh_strip with multiple -dbgsym packages

[Ken McDonell <kenj@kenj.id.au>]

Hi,

I'm one of the upstream developers for pcp (https://pcp.io/).

After about 20 years of not having debug packages for Debian-like builds because we could not get it to work, we've returned to the issue.

I made this change to the rules file:

- if dh_strip -a --no-automatic-dbgsym; then :; else dh_strip -a; fi
+ dh_strip -a

Now there are some 38 packages build from our rules and control file, and this change emitted an additional 6 packages with -dbgsym names ... good so far.

But when these packages are installed we're seeing multiple errors like:

dpkg: error processing archive pcp-testsuite-dbgsym_7.0.3-1_i386.deb (--install):
 trying to overwrite '/usr/lib/debug/.build-id/03/1ee94b5063d0d1066fad44f5c91ac129946338.debug', which is also in package pcp-dbgsym 7.0.3-1

and sure enough, dbpkg-deb -c confirms that this file is in *both* the pcp-dbgsym and pcp-testsuite-dbgsym .deb package files.

Strangely, this failed on Debian 11, 12 and 13 in our overnight build and QA, but not on any of the Ubuntu systems with corresponding Debian bases.

Any clues or hints would be most appreciated.