Add missing cmath include in FWCore files

[Dr15Jones]

PR description:

• We should include what we use.
• Apparently we were getting this header indirectly from ROOT and with the new version that has changed.

This should fix a compilation problem in the ROOT_X build.

PR validation:

Code compiles.

[Dr15Jones]

please test

[Dr15Jones]

+1

[cmsbuild]

cms-bot internal usage

[cmsbuild]

+code-checks

Logs: https://cmssdt.cern.ch/SDT/code-checks/cms-sw-PR-49136/46418

• There are other open Pull requests which might conflict with changes you have proposed:
  • File FWCore/Framework/test/stubs/ToyIntProducers.cc modified in PR(s): [RFC] descriptions.addDefault -> descriptions.addWithDefaultLabel #44372

[cmsbuild]

A new Pull Request was created by @Dr15Jones for master.

It involves the following packages:

• FWCore/Framework (core)
• FWCore/Integration (core)

can you please review it and eventually sign? Thanks.
@makortel, @wddgit this is something you requested to watch as well.
@ftenchini, @mandrenguyen, @sextonkennedy you are the release manager for this.

cms-bot commands are listed here

[cmsbuild]

+1

Size: This PR adds an extra 44KB to repository
Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-054f5c/48613/summary.html
COMMIT: e38d6c4
CMSSW: CMSSW_16_0_X_2025-10-10-2300/el8_amd64_gcc13
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week0/cms-sw/cmssw/49136/48613/install.sh to create a dev area with all the needed externals and cmssw changes.

Comparison Summary

Summary:

• You potentially added 1 lines to the logs
• Reco comparison results: 12 differences found in the comparisons
• DQMHistoTests: Total files compared: 51
• DQMHistoTests: Total histograms compared: 3940073
• DQMHistoTests: Total failures: 53
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 3940000
• DQMHistoTests: Total skipped: 20
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 50 files compared)
• Checked 218 log files, 188 edm output root files, 51 DQM output files
• TriggerResults: no differences found

[mandrenguyen]

+1