build: configure BAZEL_USE_CPP_ONLY_TOOLCHAIN=1 on macOS to bypass wrapped_clang

Author: vkarampudi

.bazelrc

@@ -29,7 +29,9 @@ build --protocopt=--experimental_allow_proto3_optional
 build --incompatible_require_linker_input_cc_api=false
 
 build:macos --apple_platform_type=macos
+build:macos --repo_env=BAZEL_USE_CPP_ONLY_TOOLCHAIN=1
 build:macos_arm64 --cpu=darwin_arm64
+build:macos_arm64 --repo_env=BAZEL_USE_CPP_ONLY_TOOLCHAIN=1
 build:macos_arm64 --linkopt=-Wl,-undefined,dynamic_lookup
 build:macos_arm64 --host_linkopt=-Wl,-undefined,dynamic_lookup
 build --conlyopt=-std=c11

.github/workflows/conda-build.yml

@@ -64,6 +64,7 @@ jobs:
         fi
         echo "$HOME/.local/bin" >> $GITHUB_PATH
         echo "USE_BAZEL_VERSION=7.7.0" >> $GITHUB_ENV
+        echo "BAZEL_USE_CPP_ONLY_TOOLCHAIN=1" >> $GITHUB_ENV
         bazel --version
 
     - name: Install build tooling

.github/workflows/conda-test.yml

@@ -62,6 +62,7 @@ jobs:
         fi
         echo "$HOME/.local/bin" >> $GITHUB_PATH
         echo "USE_BAZEL_VERSION=7.7.0" >> $GITHUB_ENV
+        echo "BAZEL_USE_CPP_ONLY_TOOLCHAIN=1" >> $GITHUB_ENV
         bazel --version
 
     - name: Build the package

setup.py

@@ -99,13 +99,16 @@ def finalize_options(self):
       # This flag determines the platform qualifier of the macos wheel.
       if platform.machine() == 'arm64':
         self._additional_build_options = ['--macos_minimum_os=11.0',
-                                          '--config=macos_arm64']
+                                          '--config=macos_arm64',
+                                          '--repo_env=BAZEL_USE_CPP_ONLY_TOOLCHAIN=1']
       else:
-        self._additional_build_options = ['--macos_minimum_os=10.14']
+        self._additional_build_options = ['--macos_minimum_os=10.14',
+                                          '--repo_env=BAZEL_USE_CPP_ONLY_TOOLCHAIN=1']
 
       # Remove any overrides from conda environment that break Bazel on macOS
       os.environ.pop('APPLE_SDK_VERSION_OVERRIDE', None)
       os.environ.pop('XCODE_VERSION_OVERRIDE', None)
+      os.environ['BAZEL_USE_CPP_ONLY_TOOLCHAIN'] = '1'
 
       if 'ICONV_LIBRARIES' in os.environ:
         self._additional_build_options.append(