gha: add linux/aarch64 architecture (#30)

.github/workflows/build.yml

@@ -29,7 +29,12 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
     - uses: actions/checkout@v3
-    - run: make requirements c_lib
+    - run: make requirements
+    - name: Set up QEMU  # Needed to build aarch64 wheels
+      if: runner.os == 'Linux'
+      uses: docker/setup-qemu-action@v2
+      with:
+        platforms: all
     - uses: pypa/[email protected]
     - uses: actions/upload-artifact@v3
       with:

pyproject.toml

@@ -25,9 +25,11 @@ build = [
     "pp38-*",
     "pp39-*",
 ]
+before-all = "make c_lib"
 
 [tool.cibuildwheel.linux]
-archs = ["x86_64"]
+archs = ["x86_64", "aarch64"]
 
 [tool.cibuildwheel.macos]
 archs = ["x86_64", "universal2", "arm64"]
+environment = { MACOSX_DEPLOYMENT_TARGET="10.15" }