Feature or enhancement

Proposal:

This e.g. can allow us filter out some tests on systems, which don't conform to the C Annex F. Example: #138573.

I'm not sure where to put this stuff. In order of my preference:

1. New boolean variable in the sys module?
2. sys.float_info field? Though, sphinx docs says "The values correspond to the various floating-point constants defined in the standard header file float.h for the ‘C’ programming language".
3. in the math module?

Edit:

• sysconfig variable as another place

Has this already been discussed elsewhere?

This is a minor feature, which does not need previous discussion elsewhere

Links to previous discussion of this feature:

No response

Linked PRs

• gh-138580: add sys.float_info.iec_60559 boolean flag #138811
• gh-138580: revert PR 138811 #146501