On 24/3/2023 01:41, Chris Jones wrote:
requiring AVX512 is a really rather stringent requirement, most machines
will not have these instructions.
In fact, even if the build bots where able to make binary tarballs, if
they are using these instructions (without runtime capability checks)
then it would quite possibly render these binaries unusable on most
hardware.
What we normally require is use of these sorts of instruction sets
(AVX512, AVX2) is by default turned off so that the binaries produced
are usable on more hardware. Then, if you want to allow these
instructions on machines where they are available, provide a 'native'
variant which when selected forces the user to build from source, and
allows the build configuration to test for and if available use these
instructions.
Whether it's requiring AVX512 at runtime or just needs that support in
the compiler isn't clear, and would certainly be another thing to check
while fixing this.
- Josh
