Revert "Build sherpa with std=c++17"

[smuzaffar]

Reverts #7704
Lets test workflow 534.0 with old c++ std

[smuzaffar]

please test workflow 534.0

[cmsbuild]

A new Pull Request was created by @smuzaffar (Malik Shahzad Muzaffar) for branch IB/CMSSW_12_4_X/master.

@smuzaffar, @iarspider can you please review it and eventually sign? Thanks.
@perrotta, @dpiparo, @qliphy you are the release manager for this.
cms-bot commands are listed here

[smuzaffar]

+externals
@iarspider 534.0 workflow passed with this revert. So looks like sherpa with std=c++17 does not work ( may be because of grid-packs)

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next IB/CMSSW_12_4_X/master IBs after it passes the integration tests. This pull request will now be reviewed by the release team before it's merged. @perrotta, @dpiparo, @qliphy (and backports should be raised in the release meeting by the corresponding L2)

[cmsbuild]

+1

Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-a1c635/23292/summary.html
COMMIT: 57ed289
CMSSW: CMSSW_12_4_X_2022-03-22-1100/slc7_amd64_gcc10
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week1/cms-sw/cmsdist/7708/23292/install.sh to create a dev area with all the needed externals and cmssw changes.

Comparison Summary

There are some workflows for which there are errors in the baseline:
534.0 step 1
The results for the comparisons for these workflows could be incomplete
This means most likely that the IB is having errors in the relvals.The error does NOT come from this pull request

The workflows 1001.0, 1000.0, 136.88811, 136.874, 136.8311, 136.793, 136.7611, 136.731, 4.22 have different files in step1_dasquery.log than the ones found in the baseline. You may want to check and retrigger the tests if necessary. You can check it in the "files" directory in the results of the comparisons

@slava77 comparisons for the following workflows were not done due to missing matrix map:

• /data/cmsbld/jenkins/workspace/compare-root-files-short-matrix/data/PR-a1c635/39434.911_TTbar_14TeV+2026D88_DD4hep+TTbar_14TeV_TuneCP5_GenSimHLBeamSpot14+DigiTrigger+RecoGlobal+HARVESTGlobal
• /data/cmsbld/jenkins/workspace/compare-root-files-short-matrix/data/PR-a1c635/534.0_sherpa_ZtoLL_2j_MEPSatNLO_13TeV_MASTER+sherpa_ZtoLL_2j_MEPSatNLO_13TeV_MASTER+HARVESTGEN

Summary:

• No significant changes to the logs found
• Reco comparison results: 4 differences found in the comparisons
• DQMHistoTests: Total files compared: 49
• DQMHistoTests: Total histograms compared: 3695650
• DQMHistoTests: Total failures: 52024
• DQMHistoTests: Total nulls: 61
• DQMHistoTests: Total successes: 3643543
• DQMHistoTests: Total skipped: 22
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 48 files compared)
• Checked 205 log files, 45 edm output root files, 49 DQM output files
• TriggerResults: no differences found