CI broken by CMake upgrade in ubuntu images

[marcalff]

Fixes #3334

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• CHANGELOG.md updated for non-trivial changes
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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.56%. Comparing base (c2a9397) to head (37f7658).
Report is 4 commits behind head on main.

Additional details and impacted files

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##             main    #3335   +/-   ##
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  Coverage   89.56%   89.56%           
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  Files         210      210           
  Lines        6502     6502           
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  Hits         5823     5823           
  Misses        679      679           

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[dbarker]

@marcalff I've run into this same set of test failures shown here when trying to build with newer versions of protobuf required by newer versions of grpc. The issue has been reproducible using BUILD_SHARED_LIBS=ON for opentelemetry-cpp building against static libs for protobuf. However building static libs for otel-cpp work and tests pass. I've reproduced it going back to protobuf/5.27.0 + grpc/1.67.1 and on the latest version of protobuf/5.29.0 + grpc/1.71.0. I haven't logged a ticket yet and more investigation is needed.

[marcalff]

@dbarker There are currently many failures piled one of top of another:

• github bumped cmake to 4.0.0 in Ubuntu 22 and Ubuntu 24 images, starting with version 20250330.1.0
• CMake 4.0.0 no longer supports cmake_minimum_required for CMake < 3.5
• This in turns breaks the build for any dependency that uses a very old CMake, either directly, or in its own dependencies
• This breaks the abseil build, the grpc build, and the opentracing build

Note that deployment of images 20250330.1.0 is still in progress, a build might use 20250330 and fail, while another might use 20250316 and pass

What I am looking for is:

• which version of abseil to use, and it must work with C++14 for now (one issue at a time)
• which version of grpc to use (same), was looking for 1.69.0
• which version of protobuf to use, compatible with grpc

And the following must be adjusted accordingly:

• CMakeLists for cmake
• Bazel files for bazel
• install scripts to download and install dependencies.

Any hint ?

[dbarker]

Any hint ?

@marcalff I have some working combinations of abseil, protobuf, and grpc in this file. However the best I could do was to get the static builds passing tests with later versions of protobuf. This required installing abseil, protobuf, and grpc separately and ensure protobuf and grpc don't use submodules for those. The shared libs builds fail the otlp file and otlp http tests with the newer protobuf so I excluded them to avoid tackling that problem in my PR.

I'm thinking that downgrading cmake may be a quicker solution for this PR and release. I can help write some scripts if needed.

[marcalff]

Closing, outdated PR.