Silence Bazel warnings from external repositories

[GMNGeoffrey]

Note that this is not the same as related questions about silencing warnings from external C++ dependencies, like #12009 (although I also spend quite a lot of time trying to get that working). I'm specifically talking about silencing Bazel warnings.

Description of the problem / feature request:

My project (https://github.com/google/iree) depends on some other projects that use Bazel. We have very little control over these dependencies. In particular, depending on TensorFlow comes with a boatload of warnings. Every time I have to build a target that loads tensorflow I get a nice preamble like:

WARNING: /usr/local/google/home/gcmn/.cache/bazel/_bazel_gcmn/c17d50ae90e3b490378de262a2ee1611/external/org_tensorflow/tensorflow/core/lib/gtl/BUILD:129:11: in linkstatic attribute of cc_library rule @org_tensorflow//tensorflow/core/lib/gtl:map_util: setting 'linkstatic=1' is recommended if there are no object files. Since this rule was created by the macro 'cc_library', the error might have been caused by the macro implementation
WARNING: /usr/local/google/home/gcmn/.cache/bazel/_bazel_gcmn/c17d50ae90e3b490378de262a2ee1611/external/org_tensorflow/tensorflow/core/BUILD:1220:11: in linkstatic attribute of cc_library rule @org_tensorflow//tensorflow/core:lib_internal: setting 'linkstatic=1' is recommended if there are no object files. Since this rule was created by the macro 'cc_library', the error might have been caused by the macro implementation
WARNING: /usr/local/google/home/gcmn/.cache/bazel/_bazel_gcmn/c17d50ae90e3b490378de262a2ee1611/external/org_tensorflow/tensorflow/core/BUILD:1614:16: in linkstatic attribute of cc_library rule @org_tensorflow//tensorflow/core:framework_internal: setting 'linkstatic=1' is recommended if there are no object files. Since this rule was created by the macro 'tf_cuda_library', the error might have been caused by the macro implementation
WARNING: /usr/local/google/home/gcmn/.cache/bazel/_bazel_gcmn/c17d50ae90e3b490378de262a2ee1611/external/org_tensorflow/tensorflow/compiler/xla/client/lib/BUILD:57:11: in hdrs attribute of cc_library rule @org_tensorflow//tensorflow/compiler/xla/client/lib:comparators: file 'libliteral_util.a' from target '@org_tensorflow//tensorflow/compiler/xla:literal_util' is not allowed in hdrs. Since this rule was created by the macro 'cc_library', the error might have been caused by the macro implementation
WARNING: /usr/local/google/home/gcmn/.cache/bazel/_bazel_gcmn/c17d50ae90e3b490378de262a2ee1611/external/org_tensorflow/tensorflow/compiler/xla/client/lib/BUILD:57:11: in hdrs attribute of cc_library rule @org_tensorflow//tensorflow/compiler/xla/client/lib:comparators: file 'libliteral_util.pic.a' from target '@org_tensorflow//tensorflow/compiler/xla:literal_util' is not allowed in hdrs. Since this rule was created by the macro 'cc_library', the error might have been caused by the macro implementation
WARNING: /usr/local/google/home/gcmn/.cache/bazel/_bazel_gcmn/c17d50ae90e3b490378de262a2ee1611/external/org_tensorflow/tensorflow/compiler/xla/client/lib/BUILD:57:11: in hdrs attribute of cc_library rule @org_tensorflow//tensorflow/compiler/xla/client/lib:comparators: file 'libliteral_util.so' from target '@org_tensorflow//tensorflow/compiler/xla:literal_util' is not allowed in hdrs. Since this rule was created by the macro 'cc_library', the error might have been caused by the macro implementation

Personally I'm of the opinion that warnings should almost always be errors or nothing (otherwise they just become log spam), but setting the more general philosophy aside, these are not warnings that we have much control over and I'd like to not see them every time I build.

Feature requests: what underlying problem are you trying to solve with this feature?

Add a flag to allow silencing WARNING messages from external repositories.

What operating system are you running Bazel on?

Linux Debian

What's the output of bazel info release?

release 3.3.1 (but also reproducible with 3.7.0)

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

Don't assume the default branch is master ;-P

$ git remote get-url origin ; git rev-parse main ; git rev-parse HEAD
git@github.com:GMNGeoffrey/iree.git
1cece448eef33e8c1f953788757ed74c8ac7103c
1cece448eef33e8c1f953788757ed74c8ac7103c

Have you found anything relevant by searching the web?

No. https://google.com/search?q=bazel+warnings+from+external+repositories

[github-actions]

Thank you for contributing to the Bazel repository! This issue has been marked as stale since it has not had any activity in the last 1+ years. It will be closed in the next 14 days unless any other activity occurs or one of the following labels is added: "not stale", "awaiting-bazeler". Please reach out to the triage team (@bazelbuild/triage) if you think this issue is still relevant or you are interested in getting the issue resolved.

[GMNGeoffrey]

Still a thing, though potentially a duplicate of #17030

[github-actions]

Thank you for contributing to the Bazel repository! This issue has been marked as stale since it has not had any activity in the last 1+ years. It will be closed in the next 90 days unless any other activity occurs. If you think this issue is still relevant and should stay open, please post any comment here and the issue will no longer be marked as stale.

[github-actions]

This issue has been automatically closed due to inactivity. If you're still interested in pursuing this, please post @bazelbuild/triage in a comment here and we'll take a look. Thanks!