Add flag to set OMP environment variables

[rosswhitfield]

No description provided.

[codecov-commenter]

Codecov Report

Merging #161 (3ec2277) into main (3ec2277) will not change coverage.
The diff coverage is n/a.

❗ Current head 3ec2277 differs from pull request most recent head d0fe8bb. Consider uploading reports for the commit d0fe8bb to get more accurate results

@@           Coverage Diff           @@
##             main     #161   +/-   ##
=======================================
  Coverage   82.05%   82.05%           
=======================================
  Files          29       29           
  Lines        5093     5093           
=======================================
  Hits         4179     4179           
  Misses        914      914           

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