fix build issue when Link to Python is turned off

[yujiex]

Pull request overview

• Fixes the build issue when Link to Python is turned off

NOTE: ENHANCEMENTS MUST FOLLOW A SUBMISSION PROCESS INCLUDING A FEATURE PROPOSAL AND DESIGN DOCUMENT PRIOR TO SUBMITTING CODE

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[Myoldmopar]

Thanks for this @yujiex. Indeed the alternate build where we turn off the default compiler flags got commented out during the CI overhaul. I enabled the alternate build on this branch to get one test with LINK_WITH_PYTHON OFF and other non-default settings. If it's happy, I'll merge this right in.

[Myoldmopar]

Looks good, thanks for fixing this up @yujiex . Merging.