Merge pull request #2790 from AlexanderViand:darwin_x86_64

PiperOrigin-RevId: 886386050

Author: copybara-github

pyproject.toml

@@ -90,7 +90,7 @@ archs = "auto64"
 [tool.cibuildwheel.macos]
 # Inherits archs from default (auto64)
 # Unused by Bazel, but needed explicitly by delocate on MacOS.
-environment = { MACOSX_DEPLOYMENT_TARGET = "10.14" }
+environment = { MACOSX_DEPLOYMENT_TARGET = "10.15" }
 
 [tool.pytest.ini_options]
 norecursedirs = [

setup.py

@@ -243,6 +243,18 @@ def bazel_build(self, ext: BazelExtension) -> None:  # noqa: C901
       # C++17 needs macOS 10.14 at minimum
       bazel_argv.append("--macos_minimum_os=10.15")
 
+      # Cross-compilation support: detect target arch from ARCHFLAGS (set by cibuildwheel).
+      archflags = os.environ.get("ARCHFLAGS", "")
+      if "x86_64" in archflags:
+        target_arch = "x86_64"
+      elif "arm64" in archflags:
+        target_arch = "arm64"
+      else:
+        target_arch = platform.machine()
+      bazel_argv.append(
+          f"--platforms=@build_bazel_apple_support//platforms:darwin_{target_arch}"
+      )
+
     with _maybe_patch_toolchains():
       self.spawn(bazel_argv)