# Part of the Carbon Language project, under the Apache License v2.0 with LLVM

# Exceptions. See /LICENSE for license information.

# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception

# Support running clang-tidy with:

# bazel build --config=clang-tidy -k //...

# See: https://github.com/erenon/bazel_clang_tidy

build:clang-tidy --aspects @bazel_clang_tidy//clang_tidy:clang_tidy.bzl%clang_tidy_aspect

build:clang-tidy --output_groups=report

build:clang-tidy --@bazel_clang_tidy//:clang_tidy_config=//:clang_tidy_config

# Default to using a disk cache to minimize re-building LLVM and Clang which we

# try to avoid updating too frequently to minimize rebuild cost. The location

# here can be overridden in the user configuration where needed.

#

# Note that this cache will grow without bound currently. You should

# periodically run the `scripts/clean_disk_cache.sh` script or some equivalent.

# https://github.com/bazelbuild/bazel/issues/5139 tracks fixing this in Bazel.

build --disk_cache=~/.cache/carbon-lang-build-cache

# Enable some safety when using the build cache, likely to be defaulted in

# future Bazel releases.

build --experimental_guard_against_concurrent_changes

# Disable warnings for all external compilations. These involve code that isn't

# developed as part of Carbon and may be difficult or impossible to patch, so

# warnings aren't likely to be actionable.

build --per_file_copt=external/.*\.(c|cc|cpp|cxx)$@-w

build --host_per_file_copt=external/.*\.(c|cc|cpp|cxx)$@-w

# Default dynamic linking to off. While this can help build performance in some

# edge cases with very large linked executables and a slow linker, between using

# fast linkers on all platforms (LLD and the Apple linker), as well as having

# relatively few such executables, shared objects simply waste too much space in

# our builds.

build --dynamic_mode=off

# Always compile PIC code. There are few if any disadvantages on the platforms

# and architectures we care about and it avoids the need to compile files twice.

build --force_pic

# Completely disable Bazel's automatic stripping of debug information. Removing

# that information causes unhelpful backtraces from unittest failures and other

# crashes. Optimized builds already avoid using debug information by default.

build --strip=never

# Enable Abseil for GoogleTest.

build --define=absl=1

# Configuration for enabling Address Sanitizer. Note that this is enabled by

# default for fastbuild. The config is provided to enable ASan even in

# optimized or other build configurations.

build:asan --features=asan

# Configuration for enabling LibFuzzer (along with ASan).

build:fuzzer --features=fuzzer

# Always allow tests to symbolize themselves with whatever `llvm-symbolize` is

# in the users environment.

build --test_env=ASAN_SYMBOLIZER_PATH

# Force actions to have a UTF-8 language encoding.

# TODO: Need to investigate what this should be on Windows, but at least for

# Linux and macOS this seems strictly better than the Bazel default of just

# `en_US`.

build --action_env=LANG=en_US.UTF-8

# Allow users to override any of the flags desired by importing a user-specific

# RC file here if present.

try-import %workspace%/user.bazelrc