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C++ Rules for Bazel
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Googler a2949e206e Fix toolchain argument ordering 
BEGIN_PUBLIC

Fix argument ordering

Expected argument ordering should be:

1. Arguments listed in `args`.
2. Legacy/built-in features.
3. User-defined features.

Due to some implementation changes, user-defined arguments were being applied last, reducing the ability for features to properly toggle behaviors dynamically.

This also fixes an issue caught by this change where cc_sysroot was applying flags to actions that had no associated action config.

END_PUBLIC

PiperOrigin-RevId: 683677895
Change-Id: I60e25ca22ffefce717e4e5ce476db0a070ca1993
 		2024-10-08 10:34:59 -07:00
.bazelci Remove crostool migration tools 2024-10-08 05:35:42 -07:00
.bcr Add bazel version 2024-10-04 13:28:28 +02:00
cc Fix toolchain argument ordering 2024-10-08 10:34:59 -07:00
docs Make stardoc a dev dependency 2024-10-04 15:07:57 +02:00
examples Sync cc toolchain from Bazel's tools/cpp 2024-10-03 09:32:38 -07:00
tests Fix toolchain argument ordering 2024-10-08 10:34:59 -07:00
.gitignore Sync cc toolchain from Bazel's tools/cpp 2024-10-03 09:32:38 -07:00
AUTHORS Create AUTHORS 2021-03-25 11:49:43 -04:00
BUILD Introduce flag --@rules_cc//:link_extra_libs 2023-02-16 04:15:10 -08:00
CODEOWNERS Merge pull request #146 from bazelbuild:meteorcloudy-patch-1 2022-09-19 13:51:00 +00:00
CONTRIBUTING.md Add initial content of rules_cc repo 2019-01-09 08:58:14 +01:00
ISSUE_TEMPLATE.md Fix issue template 2019-02-27 01:37:03 -08:00
LICENSE Internal change 2019-01-09 08:56:00 +01:00
MODULE.bazel Prepare for 0.0.12 release 2024-10-07 08:14:05 -07:00
README.md Update README.md 2023-07-19 15:32:02 -07:00
WORKSPACE Remove crostool migration tools 2024-10-08 05:35:42 -07:00
renovate.json Update renovate.json 2019-11-03 11:40:55 +01:00

README.md

C++ rules for Bazel

  • Postsubmit Build status
  • Postsubmit + Current Bazel Incompatible flags Build status

This repository contains a Starlark implementation of C++ rules in Bazel.

The rules are being incrementally converted from their native implementations in the Bazel source tree.

For the list of C++ rules, see the Bazel documentation.

Getting Started

There is no need to use rules from this repository just yet. If you want to use rules_cc anyway, add the following to your WORKSPACE file:

load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")

http_archive(
    name = "rules_cc",
    urls = ["https://github.com/bazelbuild/rules_cc/archive/refs/tags/<VERSION>.tar.gz"],
    sha256 = "...",
)

Then, in your BUILD files, import and use the rules:

load("@rules_cc//cc:defs.bzl", "cc_library")

cc_library(
    ...
)

Using the rules_cc toolchain

This repo contains an auto-detecting toolchain that expects to find tools installed on your host machine. This is non-hermetic, and may have varying behaviors depending on the versions of tools found.

There are third-party contributed hermetic toolchains you may want to investigate:

If you'd like to use the cc toolchain defined in this repo, add this to your WORKSPACE after you include rules_cc:

load("@rules_cc//cc:repositories.bzl", "rules_cc_dependencies", "rules_cc_toolchains")

rules_cc_dependencies()

rules_cc_toolchains()

Migration Tools

This repository also contains migration tools that can be used to migrate your project for Bazel incompatible changes.

Legacy fields migrator

Script that migrates legacy crosstool fields into features (incompatible flag, tracking issue).

TLDR:

bazel run @rules_cc//tools/migration:legacy_fields_migrator -- \
  --input=my_toolchain/CROSSTOOL \
  --inline

Contributing

Bazel and rules_cc are the work of many contributors. We appreciate your help!

To contribute, please read the contribution guidelines: CONTRIBUTING.md.

Note that the rules_cc use the GitHub issue tracker for bug reports and feature requests only. For asking questions see: