added support to build herwig7 and thepeg in debug mode

[smuzaffar]

backport of #10410 for master branch

[cmsbuild]

A new Pull Request was created by @smuzaffar for branch IB/CMSSW_16_1_X/master.

@akritkbehera, @cmsbuild, @iarspider, @raoatifshad, @smuzaffar can you please review it and eventually sign? Thanks.
@ftenchini, @mandrenguyen, @sextonkennedy you are the release manager for this.
cms-bot commands are listed here

[smuzaffar]

please test

[cmsbuild]

cms-bot internal usage

[cmsbuild]

+1

Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-e2b878/51911/summary.html
COMMIT: 71077e6
CMSSW: CMSSW_16_1_X_2026-03-11-1100/el8_amd64_gcc13
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week0/cms-sw/cmsdist/10411/51911/install.sh to create a dev area with all the needed externals and cmssw changes.

Comparison Summary

Summary:

• You potentially added 13 lines to the logs
• ROOTFileChecks: Some differences in event products or their sizes found
• Reco comparison results: 12 differences found in the comparisons
• DQMHistoTests: Total files compared: 53
• DQMHistoTests: Total histograms compared: 4181048
• DQMHistoTests: Total failures: 367
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 4180661
• DQMHistoTests: Total skipped: 20
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 27195.928 KiB( 52 files compared)
• DQMHistoSizes: changed ( 18434.0,... ): 6798.982 KiB HLT/JME
• Checked 227 log files, 198 edm output root files, 53 DQM output files
• TriggerResults: no differences found

[smuzaffar]

+externals

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next IB/CMSSW_16_1_X/master IBs (tests are also fine). This pull request will now be reviewed by the release team before it's merged. @sextonkennedy, @mandrenguyen, @ftenchini (and backports should be raised in the release meeting by the corresponding L2)