430 configurable config file via build flags

[Donnie-Ice]

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• Have you checked to ensure there aren't other open Pull Requests for the same update/change?

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Changes to Core Features:

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How do you test these changes?

Modify build script with -DFOO_BAR=XX and then print out the define in a unit test. Comment if you think any of the others should be converted to build flags.

API Changes:

N/A

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 75.72%. Comparing base (14ee573) to head (01f8eb1).
Report is 99 commits behind head on dev.

Additional details and impacted files

@@            Coverage Diff             @@
##              dev     #433      +/-   ##
==========================================
- Coverage   75.97%   75.72%   -0.25%     
==========================================
  Files          81       81              
  Lines       22263    22742     +479     
  Branches     1807     1853      +46     
==========================================
+ Hits        16914    17222     +308     
- Misses       4707     4845     +138     
- Partials      642      675      +33     

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[dccutrig]

I reviewed these as Donnie wrote them and we agreed on them. Some external thoughts would be nice to see if we arrive at the same conclusions.