Compatibility with CMake < 3.5 has been removed from CMake.

[Torxed]

5.562 Collecting python-olm~=3.2 (from matrix-nio[e2e])
5.575   Downloading python-olm-3.2.16.tar.gz (2.7 MB)
5.592      ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 2.7/2.7 MB 192.7 MB/s eta 0:00:00
5.780   Installing build dependencies: started
8.007   Installing build dependencies: finished with status 'done'
8.011   Getting requirements to build wheel: started
8.234   Getting requirements to build wheel: finished with status 'error'
8.240   error: subprocess-exited-with-error
8.240
8.240   × Getting requirements to build wheel did not run successfully.
8.240   │ exit code: 1
8.240   ╰─> [70 lines of output]
8.240       CMake Error at CMakeLists.txt:1 (cmake_minimum_required):
8.240         Compatibility with CMake < 3.5 has been removed from CMake.
8.240
8.240         Update the VERSION argument <min> value.  Or, use the <min>...<max> syntax
8.240         to tell CMake that the project requires at least <min> but has been updated
8.240         to work with policies introduced by <max> or earlier.
8.240
8.240         Or, add -DCMAKE_POLICY_VERSION_MINIMUM=3.5 to try configuring anyway.

To reproduce

FROM archlinux:latest

RUN pacman -Syu --noconfirm git openbsd-netcat python python-pip python-pydantic python-toml make cmake
RUN pip install matrix-nio[e2e] --break-system-packages

[MayeulC]

The documentation does not mention it yet, but there is now (as of two months ago, commit 33856b1d62e5311f456c458295ccc900eb9a38f0, should be in any CMAKE >= 4.0) an environment variable you can use:

CMAKE_POLICY_VERSION_MINIMUM=3.5 pip install matrix-nio[e2e]

That worked for me.

[stronk7]

Hi,

just for reference, I was able to build python-olm on my mac with this patch applied. The warning doesn't seems to cause the failure here, but the compilation error that is fixed with that change (sorry, I'm a complete ignorant, so I may be wrong, but for sure the library/bindings - or whatever that repo is - built ok here).

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=281497 , AKA:

diff --git a/include/olm/list.hh b/include/olm/list.hh
index 6906c87..e8f3b7c 100644
--- a/include/olm/list.hh
+++ b/include/olm/list.hh
@@ -99,7 +99,7 @@ public:
             return *this;
         }
         T * this_pos = _data;
-        T * const other_pos = other._data;
+        T const * other_pos = other._data;
         while (other_pos != other._end) {
             *this_pos = *other;
             ++this_pos;

Note I don't know how that can be fixed within matrix-nio or, maybe, it needs an issue o merge request in the upstream repo.

Also, I've seen @ #518 that the libolm usage is officially deprecated and something else (vodozemac) should be used instead. So, really, I'm a little bit lost with all these problems, ongoing changes... and how everything is going to affect to all us. I would love to know more and help, but all that stuff is far away from my abilities.

Ciao :-)

[Torxed]

I would say the main issue here is that this project uses a library that's:

IMPORTANT: libolm is now deprecated.

[PaarthShah]

Yeah the effort to bring in Vodozemac has at least already started via vodozemac-python... Trying to do stuff with olm is just going to be a losing battle.