cc_binary: linkmap support

[t-8ch]

Description of the feature request:

Our development process relies on linkmaps for binaries.
Currently cc_binary is not able to generate those.
While the necessary plumbing exists in cc_common with addition_linker_outputs this is not exposed as interface via cc_binary.

The generate_linkmap feature as used by the objc toolchain could be reused.

Which category does this issue belong to?

C++/Objective-C Rules

What underlying problem are you trying to solve with this feature?

Debugging of binaries.

Which operating system are you running Bazel on?

Linux

What is the output of bazel info release?

release 7.0.1

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 ?

No response

Have you found anything relevant by searching the web?

• Additional linker outputs in cc_binaries #14189

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

No response

[comius]

Unfortunately Bazel team is very short on C++ rules support, so we can't accept new features ATM.

[t-8ch]

That it unfortunate as there is no generic way to make cc_binary expose more linker artifacts.
(The same way cc_common.link does with additional_linker_outputs.

Do you have a very rough estimation on how long "ATM" could be?
So we can determine if we should wait or try to come up with some different/hacky solution.

[comius]

That it unfortunate as there is no generic way to make cc_binary expose more linker artifacts. (The same way cc_common.link does with additional_linker_outputs.

Do you have a very rough estimation on how long "ATM" could be? So we can determine if we should wait or try to come up with some different/hacky solution.

I don't know, I don't have any rough estimates.

[t-8ch]

Closing, as my PR got merged.

[iancha1992]

A fix for this issue has been included in Bazel 7.2.0 RC1. Please test out the release candidate and report any issues as soon as possible.
If you're using Bazelisk, you can point to the latest RC by setting USE_BAZEL_VERSION=7.2.0rc1. Thanks!