DM-34666: Set macOS deployment target to 11.0 on ARM systems

.github/workflows/build.yaml

@@ -0,0 +1,51 @@
+name: build_and_test
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+
+jobs:
+  build_and_test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - uses: conda-incubator/setup-miniconda@v2
+        with:
+          python-version: 3.8
+          channels: conda-forge,defaults
+          channel-priority: strict
+          show-channel-urls: true
+
+      - name: Install conda packages used by this package
+        shell: bash -l {0}
+        run: |
+          conda install mamba
+          mamba install -y -q scons eups compilers
+
+      # We have two cores so we can speed up the testing with xdist
+      - name: Install pytest packages
+        shell: bash -l {0}
+        run: |
+          mamba install -y -q \
+            flake8 \
+            pytest pytest-flake8 pytest-xdist pytest-openfiles pytest-cov pytest-session2file
+
+      - name: List installed packages
+        shell: bash -l {0}
+        run: |
+          conda list
+          pip list -v
+
+      - name: Build and test
+        shell: bash -l {0}
+        run: |
+          setup -k -r .
+          scons -j2
+
+      - name: Upload coverage to codecov
+        uses: codecov/codecov-action@v2
+        with:
+          file: tests/.tests/pytest-sconsUtils.xml-cov-sconsUtils.xml

configs/python.cfg

@@ -18,7 +18,7 @@ class Configuration(lsst.sconsUtils.Configuration):
         """The relevant Python is not guaranteed to be the Python
         that we are using to run SCons so we must shell out to the
         PATH python."""
-        pycmd = 'import distutils.sysconfig as s; print(s.get_config_var("{}"))'.format(name)
+        pycmd = 'import sysconfig as s; print(s.get_config_var("{}"))'.format(name)
         result = subprocess.check_output(["python", "-c", pycmd]).decode().strip()
         # Be consistent with native interface
         if result == "None":

python/lsst/sconsUtils/state.py

@@ -76,6 +76,21 @@ def _initLog():
     log = utils.Log()
 
 
+def _get_macosx_deployment_target_default():
+    """Determine the default deployment target on macOS.
+
+    Returns
+    -------
+    target : `str`
+        The default target for this platform. Can be returned even
+        if not running on macOS.
+    """
+    uname = os.uname()
+    if uname.sysname == 'Darwin' and uname.machine == 'arm64':
+        return "11.0"
+    return "10.9"
+
+
 def _initVariables():
     files = []
     if "optfile" in SCons.Script.ARGUMENTS:
@@ -106,7 +121,8 @@ def _initVariables():
         ('baseversion', 'Specify the current base version', None),
         ('optFiles', "Specify a list of files that SHOULD be optimized", None),
         ('noOptFiles', "Specify a list of files that should NOT be optimized", None),
-        ('macosx_deployment_target', 'Deployment target for Mac OS X', '10.9'),
+        ('macosx_deployment_target', 'Deployment target for Mac OS X',
+         _get_macosx_deployment_target_default()),
     )