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* Updating libpqxx to 8.0.1
@ 2026-05-15 05:37 Bradford Boyle <bradford.d.boyle@gmail.com>
2026-05-15 08:41 ` Re: Updating libpqxx to 8.0.1 Christoph Berg <myon@debian.org>
2026-05-15 17:28 ` Re: Updating libpqxx to 8.0.1 Christoph Berg <myon@debian.org>
0 siblings, 2 replies; 3+ messages in thread
From: Bradford Boyle @ 2026-05-15 05:37 UTC (permalink / raw)
To: pgsql-pkg-debian@lists.postgresql.org
Hi All,
There is a new major version (8.x) of libpqxx available and I have spent
a bit of time over the past couple of days looking at what would be
involved in updating the Debian package to this new version. Below you
will find a summary of my findings and some initial work that I have
done to prepare for packaging the new version of libpqxx. I don't think
it makes sense to update the package just yet since a couple of reverse
dependencies need to be updated upstream and in Debian in order to
support building and linking against libpxx 8.x. I wanted to share my
findings here and ask if there is anything that I have overlooked in my
investigation.
Many thanks
--
Bradford
* libpqxx has released a new major version
* 8.0.0 was released 2026-02-23
* 8.0.1 was released 2026-04-04
* Requires compiling with at least C++20
* Updating the Debian packaging appears to be straightforward; I have
updated the packaging locally and successfully built with sbuild.
Using build-rdeps, I have identified four packages that depend on
libpqxx-dev. They are:
* quickfix
* libpqxx-dev is listed as a Build-Depends but it appears to be unused
(currently nor historically)
* Should _probably_ build-depend on libpq-dev if PostgreSQL
functionality is wanted
* #1136714 - quickfix: remove build dependency on libpqxx-dev
* hipercontracer
* Already supports building against libpqxx 8+
* Still sets C++17 for Debian builds
* Minor change in CMakeLists.txt to conditionally set C++20 based on
the detected version
* https://github.com/dreibh/hipercontracer/pull/4
* osm2pgrouting
* Minor change in CMakeLists.txt to conditionally set C++20 based on
the detected version
* https://github.com/pgRouting/osm2pgrouting/pull/328
* sqlsmith
* Requires the most extensive set of changes to support compiling
against libpqxx 8+
* Submitted an initial PR to upstream
* https://github.com/anse1/sqlsmith/pull/63
None of the rdeps have reverse dependencies themselves.
* GCC 15 defaults to C++17
* Default form 11 to 15
* C++20 was not stable until GCC 16
* The documentation for C++ Standards Support in GCC indicates that
most/several C++20 features are supported in GCC 11+
* Debian bookworm gcc 12
* Debian trixie gcc 14
* Ubuntu jammy gcc 11
* Ubuntu noble gcc 13
^ permalink raw reply [nested|flat] 3+ messages in thread
* Re: Updating libpqxx to 8.0.1
2026-05-15 05:37 Updating libpqxx to 8.0.1 Bradford Boyle <bradford.d.boyle@gmail.com>
@ 2026-05-15 08:41 ` Christoph Berg <myon@debian.org>
1 sibling, 0 replies; 3+ messages in thread
From: Christoph Berg @ 2026-05-15 08:41 UTC (permalink / raw)
To: Bradford Boyle <bradford.d.boyle@gmail.com>; +Cc: pgsql-pkg-debian@lists.postgresql.org
Re: Bradford Boyle
> There is a new major version (8.x) of libpqxx available and I have spent
> a bit of time over the past couple of days looking at what would be
> involved in updating the Debian package to this new version. Below you
> will find a summary of my findings and some initial work that I have
> done to prepare for packaging the new version of libpqxx. I don't think
> it makes sense to update the package just yet since a couple of reverse
> dependencies need to be updated upstream and in Debian in order to
> support building and linking against libpxx 8.x. I wanted to share my
> findings here and ask if there is anything that I have overlooked in my
> investigation.
Hi Bradford,
thanks for working on this!
I think we should upload the new version to experimental. That way, we
don't immediately break things but maintainers can pull it from there
to check their packages.
> * sqlsmith
> * Requires the most extensive set of changes to support compiling
> against libpqxx 8+
> * Submitted an initial PR to upstream
> * https://github.com/anse1/sqlsmith/pull/63
I can take care of that part, the author is a colleague.
(pgconf.dev is next week, not sure if I'll have time before it.)
Christoph
^ permalink raw reply [nested|flat] 3+ messages in thread
* Re: Updating libpqxx to 8.0.1
2026-05-15 05:37 Updating libpqxx to 8.0.1 Bradford Boyle <bradford.d.boyle@gmail.com>
@ 2026-05-15 17:28 ` Christoph Berg <myon@debian.org>
1 sibling, 0 replies; 3+ messages in thread
From: Christoph Berg @ 2026-05-15 17:28 UTC (permalink / raw)
To: Bradford Boyle <bradford.d.boyle@gmail.com>; +Cc: pgsql-pkg-debian@lists.postgresql.org
Since I wanted to test sqlsmith against the new libpqxx, I went ahead
and packaged it. Thanks for the analysis, that helped!
> * libpqxx has released a new major version
> * Requires compiling with at least C++20
I had to "export DEB_CXXFLAGS_MAINT_APPEND = -std=gnu++20" to make it
work but the rest didn't require extra poking.
> * C++20 was not stable until GCC 16
> * The documentation for C++ Standards Support in GCC indicates that
> most/several C++20 features are supported in GCC 11+
> * Debian bookworm gcc 12
Bookworm fails because its libstc++-12-dev is missing the "format" header.
(Bullseye fails because libpqxx wants autoconf 2.71. I did not
investigate further since bookworm already fails.)
> * Ubuntu jammy gcc 11
It looks like jammy's autoconf-archive package is too old:
error: invalid first argument `20' to AX_CXX_COMPILE_STDCXX
But let's ignore that, it's EOL next year.
> * Ubuntu noble gcc 13
That worked.
Christoph
^ permalink raw reply [nested|flat] 3+ messages in thread
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2026-05-15 05:37 Updating libpqxx to 8.0.1 Bradford Boyle <bradford.d.boyle@gmail.com>
2026-05-15 08:41 ` Christoph Berg <myon@debian.org>
2026-05-15 17:28 ` Christoph Berg <myon@debian.org>
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