Loop over user prompts for clang path until receiving a valid response.
  Default is used if no input is given. Set CLANG_COMPILER_PATH and write
  environment variables CC and BAZEL_COMPILER to .bazelrc.

  Args:
    environ_cp: (Dict) copy of the os.environ.

  Returns:
    string value for clang_compiler_path.
  """
  # Default path if clang-18 is installed by using apt-get install

build:release_cpu_linux_clang_local --config=clang_local
build:release_cpu_linux_clang_local --repo_env=CC="/usr/lib/llvm-18/bin/clang"
build:release_cpu_linux_clang_local --repo_env=BAZEL_COMPILER="/usr/lib/llvm-18/bin/clang"
build:release_cpu_linux_clang_local --crosstool_top="@local_config_cuda//crosstool:toolchain"
build:release_cpu_linux_clang_local --repo_env=TF_SYSROOT="/dt9"