Using bzlmod with Bazel 6 or later:

1. [Bazel 6] Add common --enable_bzlmod to .bazelrc.

2. Add to your MODULE.bazel file:

bazel_dep(name = "rules_cc", version = "0.2.25")

Using WORKSPACE:

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

http_archive(
    name = "rules_cc",
    sha256 = "bd7124a844d0403b4b353bcea34d6c8b2ba88dc26881c26c9ee668da89b71846",
    strip_prefix = "rules_cc-0.2.25",
    url = "https://github.com/bazelbuild/rules_cc/releases/download/0.2.25/rules_cc-0.2.25.tar.gz",
)

load("@rules_cc//cc:extensions.bzl", "compatibility_proxy_repo")

compatibility_proxy_repo()

What's Changed

Notable changes

• Throw an error if include attributes contain an absolute path instead of silently ignoring them. by @a-googler in c85b4d3
• Disable macOS toolchain by default (use apple_support instead) by @keith in 0c36f2b
• Allow 'includes = ["."]' in the root of the repo by @keith in 0d150d5
• Add //cc/libc config settings for C standard libraries (#792) by @fmeum in dc42405
• Add best effort toolchain feature docs by @keith in 2c27663
• Add loongarch64 support by @zhaixiaojuan in 5178408
• Support path mapping in CppLink IFF it's non-lto. by @lilygorsheneva in ad214a9
• Create features to enable/disable path mapping for CppLink. by @lilygorsheneva in ab613e1
• Add toolchain env + default env to dwp actions by @keith in d8eea5a
• Fix system_include_paths with textual_hdrs/hdrs and strip_include_prefix by @keith in db79849
• Expose Bazel cc rule functions for extension by @hvadehra in 6c6a87e
• Expand tree artifacts in textual_hdrs in generated module maps (#787) by @fmeum in 6cc1bf0
• Honor object extensions for ThinLTO merged artifacts (#853) by @cerisier in aff5441
• Expose a new API that copying from an existing library with overrides, so that callers don't need to know all internal attributes to avoid silently dropping some. by @a-googler in 14686ad
• Implement Starlark-level enforcement of disallowed compiler flags in copts, conlyopts, cxxopts. by @a-googler in f687cbc
• Move coverage script / flag to public package (#867) by @keith in 661b75d
• Support C++20 modules, GCC part by @PikachuHyA in faf2113
• Fix conflicting actions for C++20 modules info files in PIC/non-PIC b… (#834) by @PikachuHyA in 7b711b6
• Support C++20 modules, MSVC part (#836) by @PikachuHyA in de72c61

Default toolchain changes

• Add Clang -ftime-trace support to rules_cc (#772) by @PikachuHyA in 84cca09
• Make grep_includes a public attribute (#838) by @keith in bb9acd6
• Add -z origin to bsd linkopts (#855) by @keith in b1771c1
• Add missing bsd link libraries (#859) by @keith in 2c06f12
• Remove bsd support from unix_cc_configure (use bsd toolchain instead) (#860) by @keith in 813b9bd
• Fix VS2026 being passed an unsupported debug flag in -c fastbuild by @robinlinden in c7abbec
• Fix incorrect compiler type with USE_CLANG_CL on windows. (#858) by @UebelAndre in 1d2e4cb
• Pass fission flags to ThinLTO backend actions (#837) by @akonradi in 5bcfcf7

Rules based toolchain changes

• Support C++20 modules in the rules-based toolchain API by @fmeum in 0be22af
• Fix another case of tool_paths vs action configs by @keith in 736fa13
• Add ACTION_NAMES.cpp_header_analysis to ALL_CPP_COMPILE_ACTION_NAMES. by @anforowicz in 6c1531c
• Default cc_sysroot data to sysroot if not passed (#875) by @keith in 3000380

Full Changelog: 0.2.22...0.2.25