[bug] Version conflict between dependents of spdlog/1.12.0 and mp-units/2.1.0

[pseudoCode34]

Describe the bug

Currently, mp-units/1.12.0's dependency is fmt/10.1.0. Meanwhile, the latest {fmt} version,10.2.1 is required by spdlog/2.1.0. Conan's dependency graph should have computed the compatible version requirement of the {fmt} library to satisfy those two. Perhaps, the common 10.1.0 is preferable?

How to reproduce it

• System: Mac M1
• Conan version 2.0.14
• conanfile.txt

[requires]
spdlog/1.12.0
mp-units/2.1.0

[layout]
cmake_layout

[generators]
CMakeToolchain
CMakeDeps

• Run command conan install conanfile.txt --build=missing

======== Input profiles ========
Profile host:
[settings]
arch=armv8
build_type=Release
compiler=clang
compiler.cppstd=23
compiler.version=17
os=Macos
[conf]
tools.cmake.cmake_layout:build_folder_vars=['settings.compiler', 'settings.compiler.version', 'settings.compiler.cppstd']
tools.build:compiler_executables={'c': '/opt/homebrew/opt/llvm@17/bin/clang', 'cpp': '/opt/homebrew/opt/llvm@17/bin/clang++'}

Profile build:
[settings]
arch=armv8
build_type=Release
compiler=apple-clang
compiler.cppstd=gnu17
compiler.libcxx=libc++
compiler.version=14
os=Macos
[conf]
tools.cmake.cmake_layout:build_folder_vars=['settings.compiler', 'settings.compiler.version', 'settings.compiler.cppstd']


======== Computing dependency graph ========
Graph root
    conanfile.txt: /Users/truong/ray_tracing/conanfile.txt
Requirements
    fmt/10.2.1#9199a7a0611866dea5c8849a77467b25 - Cache
    gsl-lite/0.40.0#18c5739cb0f0cf6ed59a3faaab6cc5e6 - Cache
    mp-units/2.1.0#4c9e21a6ac48b4287d6ee5b761c0a71c - Cache
    spdlog/1.12.0#baf01ff8c9be09bb6cb6c62c1804012c - Cache
Build requirements
    cmake/3.28.1#92f79424d7b65b12a84a2180866c3a78 - Cache
Resolved version ranges
    cmake/[>=3.19 <4]: cmake/3.28.1
ERROR: Version conflict: Conflict between fmt/10.1.0 and fmt/10.2.1 in the graph.
Conflict originates from mp-units/2.1.0

Run conan graph info with your recipe and add --format=html to inspect the graph errors in an easier to visualize way.

[AbrilRBS]

Hi @pseudoCode34 thanks a lot for your report. I'll move this to the proper CCI repo, where we can work on fixing it :)

[AbrilRBS]

(Note that for now, Conan Center Index does not use version ranges for most of the libraries, so Cona is not allowed to find a common version. This restriction will be lessened with time once we have enough data to support that version ranges in the context of CCI is a good fit, sorry for the pain it generates meanwhile!)

[pseudoCode34]

Hi @pseudoCode34 thanks a lot for your report. I'll move this to the proper CCI repo, where we can work on fixing it :)

Happy to help. Hope it get fixed ASAP.