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C++ Rules for Bazel
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Felix Hanau c5a0333261 Use clang-cl assembler in clang-cl toolchain again 
This essentially reverts bazelbuild/bazel#23337 now that the toolchain
configuration has been moved here. clang-cl does support assembly just like
other clang variants and unlike MASM supports assembly using native AT&T syntax
as with regular clang. MSVC-style assembly requires using MASM, which continues
to be available in the MSVC toolchain.

This has previously been discussed in bazelbuild/bazel#24152 and reverted for
Bazel 7.4.1 in bazelbuild/bazel#24211. Ideally, we'd want to have some mechanism
to make assembler selection configurable and support several kinds of asm syntax
in the future.
 		2024-11-11 15:00:01 -05:00
.bazelci Automated rollback of commit 0640261093. 2024-11-11 05:50:19 -08:00
.bcr Add bazel version 2024-10-04 13:28:28 +02:00
.github/workflows Add release automation for rules_cc 2024-11-07 03:17:54 -08:00
cc Use clang-cl assembler in clang-cl toolchain again 2024-11-11 15:00:01 -05:00
docs Apply external repo transforms to all migrated files 2024-11-07 13:29:51 -08:00
examples Remove defs.bzl usages 2024-11-06 07:35:53 -08:00
tests Fix rules_shell copybara 2024-11-06 07:36:04 -08:00
.bazelignore Rule-based toolchain example 2024-09-06 11:08:58 -07:00
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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 Copybara Merge: https://github.com/bazelbuild/rules_cc/pull/269 2024-11-07 05:14:59 -08:00
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WORKSPACE Copybara Merge: https://github.com/bazelbuild/rules_cc/pull/269 2024-11-07 05:14:59 -08:00
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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: