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Fix macos linking errors by forcing use of clang. #1251

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Merged
copybara-service merged 1 commit into from
Mar 20, 2026
Merged

Fix macos linking errors by forcing use of clang. #1251

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5 changes: 5 additions & 0 deletions grain/oss/build_whl.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -21,12 +21,17 @@ main() {
# Enable host OS specific configs. For instance, "build:linux" will be used
# automatically when building on Linux.
write_to_bazelrc "build --enable_platform_specific_config"
write_to_bazelrc "build --verbose_failures"
# Bazel 7.0.0 no longer supports dynamic symbol lookup on macOS. To resolve
# undefined symbol errors in macOS arm64 builds, explicitly add the necessary
# linker flags until dependencies are well defined. See
# https://github.com/bazelbuild/bazel/issues/19730.
write_to_bazelrc "build:macos --linkopt=-Wl,-undefined,dynamic_lookup"
write_to_bazelrc "build:macos --host_linkopt=-Wl,-undefined,dynamic_lookup"
# Force clang on macos. Otherwise we get linker errors described in
# https://github.com/bazelbuild/bazel/issues/20838.
write_to_bazelrc "build:macos --action_env=CC=clang"
write_to_bazelrc "build:macos --action_env=CXX=clang++"

write_to_bazelrc "build --@rules_python//python/config_settings:python_version=${PYTHON_VERSION}"
# Set platform-wise file extension for extension modules.
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