Add microarch-level packages

recipes/x86_64_level/LICENSE.txt

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+Copyright (c) 2023, conda-forge
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+* Redistributions of source code must retain the above copyright notice, this
+  list of conditions and the following disclaimer.
+
+* Redistributions in binary form must reproduce the above copyright notice,
+  this list of conditions and the following disclaimer in the documentation
+  and/or other materials provided with the distribution.
+
+* Neither the name of staged-recipes nor the names of its
+  contributors may be used to endorse or promote products derived from
+  this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

recipes/x86_64_level/conda_build_config.yaml

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+microarchitecture:
+- x86_64
+- x86_64_v2
+- x86_64_v3
+- x86_64_v4
+- nocona
+- core2
+- nehalem
+- westmere
+- sandybridge
+- ivybridge
+- haswell
+- broadwell
+- skylake
+- mic_knl
+- skylake_avx512
+- cannonlake
+- cascadelake
+- icelake
+- k10
+- bulldozer
+- piledriver
+- steamroller
+- excavator
+- zen
+- zen2
+- zen3
+
+level:
+- 1
+- 1
+- 2
+- 3
+- 1
+- 1
+- 2
+- 2
+- 2
+- 2
+- 3
+- 3
+- 3
+- 3
+- 4
+- 3
+- 4
+- 4
+- 1
+- 2
+- 2
+- 2
+- 3
+- 3
+- 3
+- 3
+
+zip_keys:
+  - - microarchitecture
+    - level

recipes/x86_64_level/gen.py

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+import archspec.cpu
+
+archs = archspec.cpu.TARGETS
+
+x86_64_levels = {}
+
+name_mapping = {
+  "x86_64": 1,
+  "x86_64_v2": 2,
+  "x86_64_v3": 3,
+  "x86_64_v4": 4,
+}
+
+for arch_name, arch in archs.items():
+    if arch.family.name != "x86_64":
+        continue
+    if arch.parents:
+        level = max(name_mapping.get(parent.name, 0) for parent in arch.ancestors)
+    else:
+        level = 1
+    x86_64_levels[arch_name] = level
+
+print("microarchitecture:")
+for arch in x86_64_levels.keys():
+    print(f"- {arch}")
+print()
+print("level:")
+for level in x86_64_levels.values():
+    print(f"- {level}")

recipes/x86_64_level/install_scripts.sh

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+mkdir -p "${PREFIX}"/etc/conda/{de,}activate.d/
+
+if [[ "$level" == "1" ]]; then
+  flag="-march=x86-64"
+else
+  flag="-march=x86-64-v{{ level }}"
+fi
+
+echo 'export CXXFLAGS="${CXXFLAGS} '$flag'"' >> "${PREFIX}"/etc/conda/activate.d/~activate-x86-64-level.sh
+echo 'export CFLAGS="${CFLAGS} '$flag'"' >> "${PREFIX}"/etc/conda/activate.d/~activate-x86-64-level.sh
+echo 'export CPPFLAGS="${CPPFLAGS} '$flag'"' >> "${PREFIX}"/etc/conda/activate.d/~activate-x86-64-level.sh
+chmod +x "${PREFIX}"/etc/conda/activate.d/~activate-x86-64-level.sh

recipes/x86_64_level/meta.yaml

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+package:
+  name: x86_64-microarch-level-split
+  version: {{ level }}
+
+build:
+  number: 0
+  string: 0_{{ microarchitecture }}
+  noarch: generic
+  run_exports:
+    strong:
+      - _x86_64-microarch-level >={{ level }}
+
+outputs:
+  - name: _x86_64-microarch-level
+    requirements:
+      run:
+        - __archspec  1={{ microarchitecture }}
+
+    about:
+      home: https://github.com/conda-forge/_x86_64-microarch-level-feedstock
+      summary: 'Meta package to build conda recipes with x86_64 microarchitecture levels'
+      description: |
+        The meta-package _x86_64-microarch-level enforces the microarchitecture in the
+        user system.
+
+        Note that a user would need the archspec conda package installed
+        in the base environment where conda/mamba is run from.
+
+        See x86_64-microarch-level for using this in conda recipes
+      license: BSD-3-Clause
+      license_file: LICENSE.txt
+
+  - name: x86_64-microarch-level
+    script: install_scripts.sh
+    requirements:
+      run:
+        - __unix
+    about:
+      home: https://github.com/conda-forge/_x86_64-microarch-level-feedstock
+      summary: 'Meta package to build conda recipes with x86_64 microarchitecture levels'
+      description: |
+        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.
+      license: BSD-3-Clause
+      license_file: LICENSE.txt
+
+about:
+  home: https://github.com/conda-forge/x86_64-microarch-level-feedstock
+  summary: 'Meta package to build conda recipes with x86_64 microarchitecture levels'
+  license: BSD-3-Clause
+  license_file: LICENSE.txt
+
+extra:
+  recipe-maintainers:
+    - isuruf