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Use the meta-package x86_64-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](https://github.com/conda-forge/microarch-level-feedstock/issues/13#issuecomment-2551385113) where a particular level needs to be forced, this can be achieved by overriding the `__archspec` [virtual package](https://docs.conda.io/projects/conda/en/stable/user-guide/tasks/manage-virtual.html) 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.

Uploaded Tue Apr 1 02:51:35 2025
md5 checksum ffe682d555e7117eb61ca43dbd05ce5d
build 2_haswell
build_number 2
depends __unix
license BSD-3-Clause
license_family BSD
md5 ffe682d555e7117eb61ca43dbd05ce5d
name x86_64-microarch-level
noarch generic
sha1 f6a0b8739bfe0bca88a409d1b0b84c0d845fde0f
sha256 b60068628fcf8c6d7d34872e5baf1abf0eff50f9a59d13fd781857361f058725
size 8091
subdir noarch
timestamp 1737665546042
version 3