Package: dpkg-dev Version: 126.96.36.199 Severity: important Justification: Make unrelated packages violate multi-arch specs Dear Maintainer, When doing bin-nmu, each architecture gets its own d/changelog entry like: rrdtool (1.7.0-1+b1) sid; urgency=low, binary-only=yes * Binary-only non-maintainer upload for arm64; no source changes. * Rebuild without ruby2.3 support. -- arm Build Daemon (arm-conova-01) <buildd_arm64-arm- firstname.lastname@example.org> Tue, 27 Mar 2018 12:27:33 +0000 rrdtool (1.7.0-1+b1) sid; urgency=low, binary-only=yes * Binary-only non-maintainer upload for armhf; no source changes. * Rebuild without ruby2.3 support. -- armhf / armel Build Daemon (hoiby) <email@example.com> Wed, 28 Mar 2018 08:13:09 +0000 As a result, when building rrdtool +b1 on arm64  we have: SOURCE_DATE_EPOCH="1522153653" while on armhf  we have: SOURCE_DATE_EPOCH="1522224789" This causes the packages librrds-perl - that uses pod2man - to get /usr/share/ man/man3/RRDs.3pm.gz having different files on different architectures: On amd64 architecture: .TH RRDs 3pm "2018-03-27" "perl v5.26.1" "User Contributed Perl Documentation" On armhf architecture: .TH RRDs 3pm "2018-03-28" "perl v5.26.1" "User Contributed Perl Documentation" This in turn results in the package no longer being Multi-arch:same after the bin-nmus, as reported by Since a bin-nmu can occur for a single architecture, I believe the best course of action would be to change dpkg-buildpackage behavior to keep previous SOURCE_DATE_EPOCH when building a bin-nmu'ed package. This could be achive by ignoring the entries in d/changelog that contain the "binary-only=yes" tag when setting SOURCE_DATE_EPOCH. Note that I did not test this solution. WB team input would be great at this point. Appologies for the severity. While multi-arch is not part of the policy (#749826), I guess it is used wildly-enough to justify this. Fell free to adjust, obviously. See also https://lists.debian.org/debian-wb-team/2018/03/msg00040.html  https://buildd.debian.org/status/fetch.php? pkg=rrdtool&arch=arm64&ver=1.7.0-1%2Bb1&stamp=1522153882&raw=0  https://buildd.debian.org/status/fetch.php? pkg=rrdtool&arch=armhf&ver=1.7.0-1%2Bb1&stamp=1522225293&raw=0
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