Meta package to build conda recipes with microarchitecture levels
Use the meta-package ppc64le-microarch-level in requirements/build in conda recipes to set up the compiler flags and set up the virtual package requirements in the run requirements.
When building packages on CI, level=4 will not be guaranteed, so you can only use level<=3 to build.
The run_exports only has a lower bound and therefore a level=2 build can be installed on a level=3 user system. A tighter bound is not added because we want to be able to test both level=2 and level=3 on a CI machine with level=3. Therefore in order to prioritise the highest level, use the build number to prioritise the level.
In rare circumstances
where a particular level needs to be forced, this can be achieved by
overriding the __archspec
virtual package
by setting the CONDA_OVERRIDE_ARCHSPEC environment variable during
the environment solve.
For example, setting CONDA_OVERRIDE_ARCHSPEC=x86_64 will force
level=1. For levels higher than 1 CONDA_OVERRIDE_ARCHSPEC=x86_64_vx
will force level=x. For example, CONDA_OVERRIDE_ARCHSPEC=x86_64_v2
will force level=2.
Note that no checks will be done to ensure that the level is viable.
Only supported on Linux and macOS.
