[all-commits] [llvm/llvm-project] e5371e: [compiler-rt] Don't build SME routines if __arm_cp...

[Sander de Smalen via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e5371eded9c22ec4854634c9c58df793562f782d
      https://github.com/llvm/llvm-project/commit/e5371eded9c22ec4854634c9c58df793562f782d
  Author: Sander de Smalen <sander.desmalen at arm.com>
  Date:   2024-12-12 (Thu, 12 Dec 2024)

  Changed paths:
    M compiler-rt/lib/builtins/CMakeLists.txt

  Log Message:
  -----------
  [compiler-rt] Don't build SME routines if __arm_cpu_features is not initialised. (#119703)

According to the conversation

[here](https://github.com/llvm/llvm-project/pull/119414#issuecomment-2536495859),
some platforms don't enable `__arm_cpu_features` with a global
constructor, but rather do so lazily when called from the FMV resolver.

PR #119414 removed the CMake guard to check to see if the targetted
platform is baremetal or supports sys/auxv. Without this check, the
routines rely on `__arm_cpu_features` being initialised when they may
not be, depending on the platform.

This PR simply avoids building the SME routines for those platforms for
now.



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