Turn soversion ON by default

[lmoureaux]

Explain what you would like to see improved and how.

ROOT binary distributions don't always enable the soversion option even though it has always been recommended.

root/cmake/modules/RootBuildOptions.cmake

Line 161 in 15f0275

ROOT_BUILD_OPTION(soversion OFF "Set version number in sonames (recommended)")

For instance, Conda enables it explicitly and LCG doesn't.

Since this option is recommended and can help prevent subtle bugs caused by version mismatches, it should be enabled by default. Versioning libraries is in any case good practice.

ROOT version

ROOT 6.34.04 from /cvmfs/sft.cern.ch/lcg/releases/ROOT/6.34.04-2bf94/x86_64-el9-gcc14-opt/.
ROOT 6.32.02 from conda-forge.
Own build with last shared commit at cd80527.

Installation method

conda, LCG, source build

Operating system

Linux (all)

Additional context

No response

[dpiparo]

thanks @lmoureaux for this report.

[dpiparo]

@andresailer for LCG Releases (the path above is controlled by ROOT, of course)

[lmoureaux]

Thanks for the quick action! Wouldn't it be better to change the default in CMake though?

[guitargeek]

Yes, that would be better. Enabling the soversion flag in the CI was important to see if things work, but to address this issue we'll have to turn soversion ON by default in the RootBuildOptions.cmake:

https://github.com/root-project/root/blob/master/cmake/modules/RootBuildOptions.cmake#L161