[debian-mysql] Bug#1140151: libmariadb-dev-compat: not Multi-Arch co-installable (blocks cross-arch -dev installs)

[Dick Hollenbeck]

Package: libmariadb-dev-compat
Version: 1:11.8.6-0+deb13u1
Severity: normal

Dear Maintainer,

libmariadb-dev-compat (and the libmariadb-dev it depends on) cannot be
installed for two architectures at once, because the package is not marked
"Multi-Arch: same". dpkg therefore generates an implicit cross-architecture
conflict:

# docker run --rm debian:sid bash
dpkg --add-architecture arm64
apt-get update
apt-get install -s libmariadb-dev-compat:amd64 libmariadb-dev-compat:arm64
...
libmariadb-dev-compat:amd64 Conflicts libmariadb-dev-compat:arm64
libmariadb-dev-compat:arm64 : Depends: libmariadb-dev:arm64 (= ...)
but it is not installable

The package's explicit Conflicts: field only lists the old
libmysqlclient-dev / lgpl compat names; the cross-arch conflict above is the
*implicit* one dpkg adds to any package that is not Multi-Arch: same.

This blocks cross-architecture C/C++ development against the MySQL/MariaDB
client. In particular it blocks libpoco-dev from being co-installable across
architectures even after libpoco-dev itself is fixed: libpoco-dev depends on
default-libmysqlclient-dev, which resolves to libmariadb-dev-compat, so the
two libpoco-dev arches cannot coexist solely because of this package. (See my
related report against libpoco-dev.)

This is the same underlying issue as #1006388.

Status across releases (verified):
- trixie: 1:11.8.6-0+deb13u1 - not Multi-Arch: same, not co-installable
- unstable: 1:11.8.8-1 - still not Multi-Arch: same, still not
co-installable (so not fixed for forky
either)

Request: please make the MariaDB client -dev packages (libmariadb-dev and
libmariadb-dev-compat) Multi-Arch: same / co-installable, moving any
architecture-dependent files into the triplet directories as needed. I'm
happy to help test candidates across amd64/arm64.

Steps to reproduce: as above.

Thanks,
Dick Hollenbeck



-- System Information:
Debian Release: 13.4
APT prefers stable-updates
APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 6.12.74+deb13+1-amd64 (SMP w/16 CPU threads; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages libmariadb-dev-compat depends on:
ii libmariadb-dev 1:11.8.6-0+deb13u1

libmariadb-dev-compat recommends no packages.

libmariadb-dev-compat suggests no packages.

-- no debconf information