Add cross compilation support for linux AArch64

Author: odidev

bin/update_docker.py

@@ -35,6 +35,7 @@ class Image(NamedTuple):
     Image("manylinux2014", "pypy_x86_64", "quay.io/pypa/manylinux2014_x86_64", None),
     Image("manylinux2014", "pypy_i686", "quay.io/pypa/manylinux2014_i686", None),
     Image("manylinux2014", "pypy_aarch64", "quay.io/pypa/manylinux2014_aarch64", None),
+    Image("manylinux2014", "xc_aarch64", "dockcross/manylinux2014_aarch64", None),
     # 2_24 images
     Image("manylinux_2_24", "x86_64", "quay.io/pypa/manylinux_2_24_x86_64", None),
     Image("manylinux_2_24", "i686", "quay.io/pypa/manylinux_2_24_i686", None),

cibuildwheel/__main__.py

@@ -11,6 +11,7 @@
 
 import cibuildwheel
 import cibuildwheel.linux
+import cibuildwheel.crosslinux
 import cibuildwheel.macos
 import cibuildwheel.util
 import cibuildwheel.windows
@@ -35,6 +36,7 @@
     "i686",
     "pypy_x86_64",
     "aarch64",
+    "xc_aarch64",
     "ppc64le",
     "s390x",
     "pypy_aarch64",
@@ -56,7 +58,7 @@ def main() -> None:
 
     parser.add_argument(
         "--platform",
-        choices=["auto", "linux", "macos", "windows"],
+        choices=["auto", "linux", "crosslinux", "macos", "windows"],
         default=os.environ.get("CIBW_PLATFORM", "auto"),
         help="""
             Platform to build for. For "linux" you need docker running, on Mac
@@ -278,7 +280,7 @@ def main() -> None:
         sys.exit(0)
 
     manylinux_images: Dict[str, str] = {}
-    if platform == "linux":
+    if platform == "linux" or platform == "crosslinux":
         pinned_docker_images_file = resources_dir / "pinned_docker_images.cfg"
         all_pinned_docker_images = ConfigParser()
         all_pinned_docker_images.read(pinned_docker_images_file)
@@ -347,6 +349,8 @@ def main() -> None:
     ):
         if platform == "linux":
             cibuildwheel.linux.build(build_options)
+        elif platform == "crosslinux":
+            cibuildwheel.crosslinux.build(build_options)
         elif platform == "windows":
             cibuildwheel.windows.build(build_options)
         elif platform == "macos":
@@ -400,7 +404,7 @@ def get_build_identifiers(
         List[cibuildwheel.macos.PythonConfiguration],
     ]
 
-    if platform == "linux":
+    if platform == "linux" or platform == "crosslinux":
         python_configurations = cibuildwheel.linux.get_python_configurations(
             build_selector, architectures
         )

cibuildwheel/architecture.py

@@ -6,7 +6,7 @@
 
 from .typing import Literal, PlatformName, assert_never
 
-PRETTY_NAMES = {"linux": "Linux", "macos": "macOS", "windows": "Windows"}
+PRETTY_NAMES = {"linux": "Linux", "crosslinux": "CrossLinux", "macos": "macOS", "windows": "Windows"}
 
 
 @functools.total_ordering
@@ -57,6 +57,10 @@ def auto_archs(platform: PlatformName) -> "Set[Architecture]":
         native_architecture = Architecture(platform_module.machine())
         result = {native_architecture}
 
+        if platform == "crosslinux":
+            result.add(Architecture.aarch64)
+            result.remove(native_architecture)
+
         if platform == "linux" and native_architecture == Architecture.x86_64:
             # x86_64 machines can run i686 docker containers
             result.add(Architecture.i686)
@@ -80,6 +84,10 @@ def all_archs(platform: PlatformName) -> "Set[Architecture]":
                 Architecture.ppc64le,
                 Architecture.s390x,
             }
+        elif platform == "crosslinux":
+            return {
+                Architecture.aarch64,
+            }
         elif platform == "macos":
             return {Architecture.x86_64, Architecture.arm64, Architecture.universal2}
         elif platform == "windows":