GCC 10.x does not build for me due to lack of support of
std::source_location. Considering it first appears as no longer
experimental in GCC 12 docs, I suspect it will not work in GCC 11
despite Core saying they support GCC 11 here:
https://github.com/bitcoin/bitcoin/pull/29091/
Debian Bookworm (12) packages GCC 12 by default so this makes sense
as the minimum supported version for ABC.