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warp.config.cpu_compiler_flags#

warp.config.cpu_compiler_flags: str | None = None#

Flags controlling CPU kernel compilation.

Warp acts as a compiler driver for the embedded Clang frontend. The flag -march=native is intercepted and triggers host CPU feature detection (equivalent to llvm::sys::getHostCPUName() + getHostCPUFeatures()). All other flags are passed through to the Clang frontend as-is.

The value controls both CPU target detection and extra compiler flags:

  • None (default): detect host CPU features (equivalent to "-march=native").

  • "": disable host CPU detection; compile for a generic target.

  • "-march=native": explicitly detect host CPU features.

  • "-march=native -fno-vectorize": detect host CPU + pass -fno-vectorize.

  • "-fno-vectorize": generic target + pass -fno-vectorize.

Changing this setting invalidates the kernel cache.