On 25/01/2021 20:44, Edward Diener via Boost wrote:
I offer all this up as a possibly valid reason why testing a Boost library on some other platform/architecture, other than the usual Intel x64 on Mac/Linux/Windows, is not going to be a big priority for any Boost library developer/maintainer.
I would take the view that over half of all computing devices where C++ is likely to run are ARM or AArch64. Therefore one ought to be targeting one's code at those preferentially to other architectures. You're right that for high level libraries, C++ is generally very portable. But for low level libraries, and any high level libraries which depend on those low level libraries, there can be some _very_ nasty surprises e.g. ARM does not implement all of IEEE 754, and ARM is strict about use of acquire-release atomics as well as alignment in a way x64 is not. Therefore, in my opinion, if your code works well on ARM, it's very likely to work on x64. But the reverse is not true. Niall