As a maintainer of devel/blitz, could you have a look at PR #252648:
In short, TBB version 2021 will soon be available as devel/onetbb but the port you maintain does not build correctly with it, see the following Poudriere run:
and error logs:
[box.martymac.org] Installing onetbb-2021.1.1...
[box.martymac.org] Extracting onetbb-2021.1.1: .......... done
===> blitz-1.0.2_3 depends on file: /usr/local/include/tbb/atomic.h - not found
*** Error code 1
Could you try to provide a patch (important: *by replying to this PR*) to facilitate the migration to devel/onetbb ?
To help you modifying your port, expected patches to devel/tbb and devel/onetbb are available in PR #252648.
Thanks for your contribution,
Marked the TBB option BROKEN.
A commit references this bug:
Date: Thu Jan 14 21:55:01 UTC 2021
New revision: 561605
devel/blitz: Mark the TBB option broken until the upstream updates the project to be compatible with oneTBB
Reported by: martymac