Include debug/release and optimization level in the Python build/version line

[disconnect3d]

Hi,

When discussing issues like this one and printing out Python lines etc. it would be nice if the given CPython build line like this:

Python 3.15.0a0 (heads/main:c6e6fe92cd8, Jul 20 2025, 13:06:47) [GCC 13.3.0] on linux

would include information regarding how the given CPython version was compiled: whether it uses LTO, whether --enable-optimizations was enabled etc.

Maybe we could have some letters like: O for optimized, L for LTO, P for PGO, B for LLVM's BOLT? Maybe even O{1,2,3} for -O{1,2,3} if we allow for choosing this.

Additionally, we could have some _testcapi.compiler_options string?

Has this already been discussed elsewhere?

I am not sure.

[picnixz]

I've suggested something similar in the past but it was not really supported :( #122470

But your suggestion with letters may be interesting

[StanFromIreland]

I am +1 on this, but maybe this should be a Discourse thread first as it was recommended on the previous issue, unless I am unable to find it?

[picnixz]

Yes, let's discuss it on Discourse first. I'll close this one in the mean time and will reopen it if it gets sufficient support. I'll take care of implementing the feature it it's needed as well.

[terryjreedy]

Currently I see "free-threading build" added, but not that this is also 'debug'.