binary target not working properly as deps for macos_command_line_application

[yiyinglai]

//mediapipe/examples/desktop/face_mesh:face_mesh_cpu is already a binary target, which can be built and run successfully. With the below configuration, it is complaint that there's no main function.

load("@build_bazel_rules_apple//apple:macos.bzl", "macos_command_line_application")
macos_command_line_application(
    name = "face_mesh_cpu_tool",
    deps = [
        "//mediapipe/examples/desktop/face_mesh:face_mesh_cpu",
    ],
    bundle_id = "com.mediapipe.FaceMeshCpu",
    infoplists = [
        "//mediapipe/examples/desktop/face_mesh:Info.plist",
    ],
    minimum_os_version = "15.0",
    visibility = ["//visibility:public"],
)

ERROR: /Users/yiyinglai/workspace/github/mediapipe/mediapipe/examples/desktop/face_mesh/BUILD:62:31: Linking mediapipe/examples/desktop/face_mesh/face_mesh_cpu_tool_bin failed: (Exit 1): wrapped_clang failed: error executing command (from target //mediapipe/examples/desktop/face_mesh:face_mesh_cpu_tool) external/local_config_cc/wrapped_clang @bazel-out/macos-arm64-min15.0-applebin_macos-darwin_arm64-fastbuild-ST-c0090dab5885/bin/mediapipe/examples/desktop/face_mesh/face_mesh_cpu_tool_bin-2.params

Use --sandbox_debug to see verbose messages from the sandbox and retain the sandbox build root for debugging
Undefined symbols for architecture arm64:
  "_main", referenced from:
      <initial-undefines>
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
Error in child process '/usr/bin/xcrun'. 1
Target //mediapipe/examples/desktop/face_mesh:face_mesh_cpu_tool failed to build

[keith]

In this case since //mediapipe/examples/desktop/face_mesh:face_mesh_cpu is a cc_binary target, macos_command_line_application should probably reject it in the deps. It expects you to pass library targets instead. I don't think cc_binary propagates enough information to be re-linked as another binary