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# This file is licensed under the Apache License v2.0 with LLVM Exceptions.
# See https://llvm.org/LICENSE.txt for license information.
# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
###############################################################################
# Common flags that apply to all configurations.
# Use sparingly for things common to all compilers and platforms.
###############################################################################
# Prevent invalid caching if input files are modified during a build.
build --experimental_guard_against_concurrent_changes
###############################################################################
# Options to select different strategies for linking potential dependent
# libraries. The default leaves it disabled.
###############################################################################
build:zlib_external --repo_env=BAZEL_LLVM_ZLIB_STRATEGY=external
build:zlib_system --repo_env=BAZEL_LLVM_ZLIB_STRATEGY=system
build:terminfo_external --repo_env=BAZEL_LLVM_TERMINFO_STRATEGY=external
build:terminfo_system --repo_env=BAZEL_LLVM_TERMINFO_STRATEGY=system
###############################################################################
# Options for "generic_clang" builds: these options should generally apply to
# builds using a Clang-based compiler, and default to the `clang` executable on
# the `PATH`. While these are provided for convenience and may serve as a
# reference, it would be preferable for users to configure an explicit C++
# toolchain instead of relying on `.bazelrc` files.
###############################################################################
# Set the default compiler to the `clang` binary on the `PATH`.
build:generic_clang --repo_env=CC=clang
# C++14 standard version is required.
build:generic_clang --cxxopt=-std=c++14 --host_cxxopt=-std=c++14
# Use `-Wall` and `-Werror` for Clang.
build:generic_clang --copt=-Wall --copt=-Werror --host_copt=-Wall --host_copt=-Werror
# The Clang available on MacOS has a warning that isn't clean on MLIR code. The
# warning doesn't show up with more recent Clangs, so just disable for now.
build:generic_clang --cxxopt=-Wno-range-loop-analysis --host_cxxopt=-Wno-range-loop-analysis
# Build errors are not a helpful way to enforce deprecation in-repo and it is
# not the point of the Bazel build to catch usage of deprecated APIs.
build:generic_clang --copt=-Wno-deprecated --host_copt=-Wno-deprecated
###############################################################################
# Options for "generic_gcc" builds: these options should generally apply to
# builds using a GCC-based compiler, and default to the `gcc` executable on
# the `PATH`. While these are provided for convenience and may serve as a
# reference, it would be preferable for users to configure an explicit C++
# toolchain instead of relying on `.bazelrc` files.
###############################################################################
# Set the default compiler to the `gcc` binary on the `PATH`.
build:generic_gcc --repo_env=CC=gcc
# C++14 standard version is required.
build:generic_gcc --cxxopt=-std=c++14 --host_cxxopt=-std=c++14
# Build errors are not a helpful way to enforce deprecation in-repo and it is
# not the point of the Bazel build to catch usage of deprecated APIs.
build:generic_gcc --copt=-Wno-deprecated --host_copt=-Wno-deprecated
# Disable GCC warnings that are noisy and/or false positives on LLVM code.
# These need to be global as some code triggering these is in header files.
build:generic_gcc --copt=-Wno-unused-parameter --host_copt=-Wno-unused-parameter
build:generic_gcc --copt=-Wno-comment --host_copt=-Wno-comment
build:generic_gcc --cxxopt=-Wno-class-memaccess --host_cxxopt=-Wno-class-memaccess
build:generic_gcc --copt=-Wno-maybe-uninitialized --host_copt=-Wno-maybe-uninitialized
build:generic_gcc --copt=-Wno-misleading-indentation --host_copt=-Wno-misleading-indentation
# Use `-Werror` for GCC to make sure warnings don't slip past.
build:generic_gcc --copt=-Werror --host_copt=-Werror
###############################################################################
# Generic Windows flags common to both MSVC and Clang.
###############################################################################
# C++14 standard version is required.
build:windows --cxxopt=/std:c++14 --host_cxxopt=/std:c++14
# Other generic dialect flags.
build:windows --copt=/Zc:strictStrings --host_copt=/Zc:strictStrings
build:windows --copt=/Oi --host_copt=/Oi
build:windows --cxxopt=/Zc:rvalueCast --host_cxxopt=/Zc:rvalueCast
# Use the more flexible bigobj format for C++ files that have lots of symbols.
build:windows --cxxopt=/bigobj --host_cxxopt=/bigobj
###############################################################################
# Windows specific flags for building with MSVC.
###############################################################################
build:msvc --config=windows
build:msvc --copt=/WX --host_copt=/WX # Treat warnings as errors...
# ...but disable the ones that are violated
build:msvc --copt=/wd4141 --host_copt=/wd4141 # inline used more than once
build:msvc --copt=/wd4244 --host_copt=/wd4244 # conversion type -> type
build:msvc --copt=/wd4267 --host_copt=/wd4267 # conversion size_t -> type
build:msvc --copt=/wd4273 --host_copt=/wd4273 # multiple definitions with different dllimport
build:msvc --copt=/wd4319 --host_copt=/wd4319 # zero-extending after complement
build:msvc --copt=/wd4624 --host_copt=/wd4624 # destructor was implicitly defined as deleted
build:msvc --copt=/wd4804 --host_copt=/wd4804 # comparisons between bool and int
build:msvc --copt=/wd4805 --host_copt=/wd4805 # comparisons between bool and int
build:msvc --linkopt=/WX --host_linkopt=/WX # Treat warnings as errors...
# ...but disable the ones that are violated.
build:msvc --linkopt=/IGNORE:4001 --host_linkopt=/IGNORE:4001 # no object files
###############################################################################
# Options for Windows `clang-cl` builds.
###############################################################################
# We just start with the baseline Windows config as `clang-cl` doesn't accept
# some of the generic Clang flags.
build:clang-cl --config=windows
# Switch from MSVC to the `clang-cl` compiler.
build:clang-cl --compiler=clang-cl
# Use Clang's internal warning flags instead of the ones that sometimes map
# through to MSVC's flags.
build:clang-cl --copt=/clang:-Wall --host_copt=/clang:-Wall
build:clang-cl --copt=/clang:-Werror --host_copt=/clang:-Werror
# This doesn't appear to be enforced by any upstream bot.
build:clang-cl --copt=/clang:-Wno-unused --host_copt=/clang:-Wno-unused
# There appears to be an unused constant in GoogleTest on Windows.
build:clang-cl --copt=/clang:-Wno-unused-const-variable --host_copt=/clang:-Wno-unused-const-variable
# Disable some warnings hit even with `clang-cl` in Clang's own code.
build:clang-cl --copt=/clang:-Wno-inconsistent-dllimport --host_copt=/clang:-Wno-inconsistent-dllimport
build:clang-cl --cxxopt=/clang:-Wno-c++11-narrowing --host_cxxopt=/clang:-Wno-c++11-narrowing
###############################################################################
###############################################################################
# Configuration for building remotely using Remote Build Execution (RBE)
# Based on https://github.com/bazelbuild/bazel-toolchains/blob/master/bazelrc/bazel-1.0.0.bazelrc
###############################################################################
build:rbe --remote_instance_name=projects/llvm-bazel/instances/default_instance
# Depending on how many machines are in the remote execution instance, setting
# this higher can make builds faster by allowing more jobs to run in parallel.
# Setting it too high can result in jobs that timeout, however, while waiting
# for a remote machine to execute them.
build:rbe --jobs=150
# Set several flags related to specifying the platform, toolchain and java
# properties.
# These flags should only be used as is for the rbe-ubuntu16-04 container
# and need to be adapted to work with other toolchain containers.
build:rbe --host_javabase=@rbe_default//java:jdk
build:rbe --javabase=@rbe_default//java:jdk
build:rbe --host_java_toolchain=@bazel_tools//tools/jdk:toolchain_hostjdk8
build:rbe --java_toolchain=@bazel_tools//tools/jdk:toolchain_hostjdk8
build:rbe --crosstool_top=@rbe_default//cc:toolchain
build:rbe --action_env=BAZEL_DO_NOT_DETECT_CPP_TOOLCHAIN=1
# Platform flags:
# The toolchain container used for execution is defined in the target indicated
# by "extra_execution_platforms", "host_platform" and "platforms".
# More about platforms: https://docs.bazel.build/versions/main/platforms.html
build:rbe --extra_toolchains=@rbe_default//config:cc-toolchain
build:rbe --extra_execution_platforms=@rbe_default//config:platform
build:rbe --host_platform=@rbe_default//config:platform
build:rbe --platforms=@rbe_default//config:platform
build:rbe --define=EXECUTOR=remote
# Enable remote execution so actions are performed on the remote systems.
build:rbe --remote_executor=grpcs://remotebuildexecution.googleapis.com
# Enforce stricter environment rules, which eliminates some non-hermetic
# behavior and therefore improves both the remote cache hit rate and the
# correctness and repeatability of the build.
build:rbe --incompatible_strict_action_env=true
# Set a higher timeout value, just in case.
build:rbe --remote_timeout=3600
# Local disk cache is incompatible with remote execution (for obvious reasons).
build:rbe --disk_cache=""
# Enable authentication. This will pick up application default credentials by
# default. You can use --google_credentials=some_file.json to use a service
# account credential instead.
build:rbe --google_default_credentials=true
# The user.bazelrc file is not checked in but available for local mods.
# Always keep this at the end of the file so that user flags override.
try-import %workspace%/user.bazelrc
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