mongo-c-driver: declare valid CMake range

[Dahlgren]

Summary

Changes to recipe: mongo-c-driver

Motivation

It's not possible to compile mongo-c-driver recipe when newer versions of CMake are on system path, the recipe doesn't declare any CMake range

Details

• <2.4.0 has broken TRY_COMPILE in src/libmongoc/CMakeLists.txt, failing in CMake 4.4+
  • mongodb/mongo-c-driver@ea1b547
• <1.30.3/<2.1.0 has CMP0042 OLD in src/libbson/CMakeLists.txt, removed in CMake 4+
  • mongodb/mongo-c-driver@2344038
  • mongodb/mongo-c-driver@c60f45f
• <1.25 has cmake_minimum_required (VERSION 3.1) in src/libbson/CMakeLists.txt, rejected in CMake 4+
  • mongodb/mongo-c-driver@3c7951b#diff-71a4c7cf57df62b3b3d8bb547bcf79c5fafb5accb4a6608d696ccdf43e17ad6a

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• Read the contributing guidelines
• Checked that this PR is not a duplicate: list of PRs by recipe
• If this is a bug fix, please link related issue or provide bug details
• Tested locally with at least one configuration using a recent version of Conan

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[jcar87]

Does defining CMAKE_POLICY_VERSION_MINIMUM (to 3.5 as minimum) as suggested in #26878 not work?

Clipping the version range of CMake to <4 would prevent usage with Visual Studio 2026. I'd say we would only do this if the build script truly does not work with CMake <4 even with the policy workaround.

[Dahlgren]

Does defining CMAKE_POLICY_VERSION_MINIMUM (to 3.5 as minimum) as suggested in #26878 not work?

It only fixes the last issue with cmake_minimum_required (VERSION 3.1), if we drop older versions we can go up to <4.4

[jcar87]

I'm a bit confused. What version of mongo-c-driver are you attempting to build from source, and what error are you getting if you attempt to build that with CMake 4.0? thanks!