bazel cquery fails on any objc_library rule due to missing toolchain for cpu darwin_x86_64

[shahms]

Description of the bug:

Given a BUILD file which includes any objc_library target, a cquery which would include that target will fail on any platform which doesn't include a cc_toolchain for darwin (and presumably the appropriate CPU).

What's the simplest, easiest way to reproduce this bug? Please provide a minimal example if possible.

Given the minimal BUILD file:

objc_library(
  name = "test_lib",
  srcs = ["test_lib.m"],
  # This is optional and doesn't change anything.
  target_compatible_with = ["@platforms//os:osx"],
)

Running:

$ bazel cquery //...
INFO: Build options --crosstool_top and --host_crosstool_top have changed, discarding analysis cache.
ERROR: external/local_config_cc/BUILD:47:19: in cc_toolchain_suite rule @local_config_cc//:toolchain: cc_toolchain_suite '@local_config_cc//:toolchain' does not contain a toolchain for cpu 'darwin_x86_64'
ERROR: external/local_config_cc/BUILD:47:19: Analysis of target '@local_config_cc//:toolchain' failed
ERROR: Analysis of target '//:test_lib' failed; build aborted:
INFO: Elapsed time: 0.225s
INFO: 0 processes.
FAILED: Build did NOT complete successfully (0 packages loaded, 261 targets configured)

Which operating system are you running Bazel on?

Linux Debian Rodete-based distribution

What is the output of bazel info release?

release 5.3.2

If bazel info release returns development version or (@non-git), tell us how you built Bazel.

No response

What's the output of git remote get-url origin; git rev-parse master; git rev-parse HEAD ?

This is a local minimal reproduction.

Have you found anything relevant by searching the web?

Nothing helpful, no.

Any other information, logs, or outputs that you want to share?

No response

[keith]

i think this is fixed with --incompatible_disable_objc_library_transition which is flipped at head, the build still won't work on linux ofc though, so you'll want that target_compatible_with still. related bazelbuild/apple_support#281