1# This file is licensed under the Apache License v2.0 with LLVM Exceptions. 2# See https://llvm.org/LICENSE.txt for license information. 3# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 4 5############################################################################### 6# Common flags that apply to all configurations. 7# Use sparingly for things common to all compilers and platforms. 8############################################################################### 9# Prevent invalid caching if input files are modified during a build. 10build --experimental_guard_against_concurrent_changes 11 12############################################################################### 13# Options to select different strategies for linking potential dependent 14# libraries. The default leaves it disabled. 15############################################################################### 16 17build:zlib_external --repo_env=BAZEL_LLVM_ZLIB_STRATEGY=external 18build:zlib_system --repo_env=BAZEL_LLVM_ZLIB_STRATEGY=system 19 20build:terminfo_external --repo_env=BAZEL_LLVM_TERMINFO_STRATEGY=external 21build:terminfo_system --repo_env=BAZEL_LLVM_TERMINFO_STRATEGY=system 22 23############################################################################### 24# Options for "generic_clang" builds: these options should generally apply to 25# builds using a Clang-based compiler, and default to the `clang` executable on 26# the `PATH`. While these are provided for convenience and may serve as a 27# reference, it would be preferable for users to configure an explicit C++ 28# toolchain instead of relying on `.bazelrc` files. 29############################################################################### 30 31# Set the default compiler to the `clang` binary on the `PATH`. 32build:generic_clang --repo_env=CC=clang 33 34# C++14 standard version is required. 35build:generic_clang --cxxopt=-std=c++14 --host_cxxopt=-std=c++14 36 37# Use `-Wall` and `-Werror` for Clang. 38build:generic_clang --copt=-Wall --copt=-Werror --host_copt=-Wall --host_copt=-Werror 39 40# The Clang available on MacOS has a warning that isn't clean on MLIR code. The 41# warning doesn't show up with more recent Clangs, so just disable for now. 42build:generic_clang --cxxopt=-Wno-range-loop-analysis --host_cxxopt=-Wno-range-loop-analysis 43 44# Build errors are not a helpful way to enforce deprecation in-repo and it is 45# not the point of the Bazel build to catch usage of deprecated APIs. 46build:generic_clang --copt=-Wno-deprecated --host_copt=-Wno-deprecated 47 48############################################################################### 49# Options for "generic_gcc" builds: these options should generally apply to 50# builds using a GCC-based compiler, and default to the `gcc` executable on 51# the `PATH`. While these are provided for convenience and may serve as a 52# reference, it would be preferable for users to configure an explicit C++ 53# toolchain instead of relying on `.bazelrc` files. 54############################################################################### 55 56# Set the default compiler to the `gcc` binary on the `PATH`. 57build:generic_gcc --repo_env=CC=gcc 58 59# C++14 standard version is required. 60build:generic_gcc --cxxopt=-std=c++14 --host_cxxopt=-std=c++14 61 62# Build errors are not a helpful way to enforce deprecation in-repo and it is 63# not the point of the Bazel build to catch usage of deprecated APIs. 64build:generic_gcc --copt=-Wno-deprecated --host_copt=-Wno-deprecated 65 66# Disable GCC warnings that are noisy and/or false positives on LLVM code. 67# These need to be global as some code triggering these is in header files. 68build:generic_gcc --copt=-Wno-unused-parameter --host_copt=-Wno-unused-parameter 69build:generic_gcc --copt=-Wno-comment --host_copt=-Wno-comment 70build:generic_gcc --cxxopt=-Wno-class-memaccess --host_cxxopt=-Wno-class-memaccess 71build:generic_gcc --copt=-Wno-maybe-uninitialized --host_copt=-Wno-maybe-uninitialized 72build:generic_gcc --copt=-Wno-misleading-indentation --host_copt=-Wno-misleading-indentation 73 74# Use `-Werror` for GCC to make sure warnings don't slip past. 75build:generic_gcc --copt=-Werror --host_copt=-Werror 76 77############################################################################### 78# Generic Windows flags common to both MSVC and Clang. 79############################################################################### 80 81# C++14 standard version is required. 82build:windows --cxxopt=/std:c++14 --host_cxxopt=/std:c++14 83 84# Other generic dialect flags. 85build:windows --copt=/Zc:strictStrings --host_copt=/Zc:strictStrings 86build:windows --copt=/Oi --host_copt=/Oi 87build:windows --cxxopt=/Zc:rvalueCast --host_cxxopt=/Zc:rvalueCast 88 89# Use the more flexible bigobj format for C++ files that have lots of symbols. 90build:windows --cxxopt=/bigobj --host_cxxopt=/bigobj 91 92############################################################################### 93# Windows specific flags for building with MSVC. 94############################################################################### 95 96build:msvc --config=windows 97 98build:msvc --copt=/WX --host_copt=/WX # Treat warnings as errors... 99# ...but disable the ones that are violated 100build:msvc --copt=/wd4141 --host_copt=/wd4141 # inline used more than once 101build:msvc --copt=/wd4244 --host_copt=/wd4244 # conversion type -> type 102build:msvc --copt=/wd4267 --host_copt=/wd4267 # conversion size_t -> type 103build:msvc --copt=/wd4273 --host_copt=/wd4273 # multiple definitions with different dllimport 104build:msvc --copt=/wd4319 --host_copt=/wd4319 # zero-extending after complement 105build:msvc --copt=/wd4624 --host_copt=/wd4624 # destructor was implicitly defined as deleted 106build:msvc --copt=/wd4804 --host_copt=/wd4804 # comparisons between bool and int 107build:msvc --copt=/wd4805 --host_copt=/wd4805 # comparisons between bool and int 108 109build:msvc --linkopt=/WX --host_linkopt=/WX # Treat warnings as errors... 110# ...but disable the ones that are violated. 111build:msvc --linkopt=/IGNORE:4001 --host_linkopt=/IGNORE:4001 # no object files 112 113############################################################################### 114# Options for Windows `clang-cl` builds. 115############################################################################### 116 117# We just start with the baseline Windows config as `clang-cl` doesn't accept 118# some of the generic Clang flags. 119build:clang-cl --config=windows 120 121# Switch from MSVC to the `clang-cl` compiler. 122build:clang-cl --compiler=clang-cl 123 124# Use Clang's internal warning flags instead of the ones that sometimes map 125# through to MSVC's flags. 126build:clang-cl --copt=/clang:-Wall --host_copt=/clang:-Wall 127build:clang-cl --copt=/clang:-Werror --host_copt=/clang:-Werror 128 129# This doesn't appear to be enforced by any upstream bot. 130build:clang-cl --copt=/clang:-Wno-unused --host_copt=/clang:-Wno-unused 131 132# There appears to be an unused constant in GoogleTest on Windows. 133build:clang-cl --copt=/clang:-Wno-unused-const-variable --host_copt=/clang:-Wno-unused-const-variable 134 135# Disable some warnings hit even with `clang-cl` in Clang's own code. 136build:clang-cl --copt=/clang:-Wno-inconsistent-dllimport --host_copt=/clang:-Wno-inconsistent-dllimport 137build:clang-cl --cxxopt=/clang:-Wno-c++11-narrowing --host_cxxopt=/clang:-Wno-c++11-narrowing 138 139############################################################################### 140 141############################################################################### 142# Configuration for building remotely using Remote Build Execution (RBE) 143# Based on https://github.com/bazelbuild/bazel-toolchains/blob/master/bazelrc/bazel-1.0.0.bazelrc 144############################################################################### 145 146build:rbe --remote_instance_name=projects/llvm-bazel/instances/default_instance 147 148# Depending on how many machines are in the remote execution instance, setting 149# this higher can make builds faster by allowing more jobs to run in parallel. 150# Setting it too high can result in jobs that timeout, however, while waiting 151# for a remote machine to execute them. 152build:rbe --jobs=150 153 154# Set several flags related to specifying the platform, toolchain and java 155# properties. 156# These flags should only be used as is for the rbe-ubuntu16-04 container 157# and need to be adapted to work with other toolchain containers. 158build:rbe --host_javabase=@rbe_default//java:jdk 159build:rbe --javabase=@rbe_default//java:jdk 160build:rbe --host_java_toolchain=@bazel_tools//tools/jdk:toolchain_hostjdk8 161build:rbe --java_toolchain=@bazel_tools//tools/jdk:toolchain_hostjdk8 162build:rbe --crosstool_top=@rbe_default//cc:toolchain 163build:rbe --action_env=BAZEL_DO_NOT_DETECT_CPP_TOOLCHAIN=1 164# Platform flags: 165# The toolchain container used for execution is defined in the target indicated 166# by "extra_execution_platforms", "host_platform" and "platforms". 167# More about platforms: https://docs.bazel.build/versions/main/platforms.html 168build:rbe --extra_toolchains=@rbe_default//config:cc-toolchain 169build:rbe --extra_execution_platforms=@rbe_default//config:platform 170build:rbe --host_platform=@rbe_default//config:platform 171build:rbe --platforms=@rbe_default//config:platform 172 173build:rbe --define=EXECUTOR=remote 174 175# Enable remote execution so actions are performed on the remote systems. 176build:rbe --remote_executor=grpcs://remotebuildexecution.googleapis.com 177 178# Enforce stricter environment rules, which eliminates some non-hermetic 179# behavior and therefore improves both the remote cache hit rate and the 180# correctness and repeatability of the build. 181build:rbe --incompatible_strict_action_env=true 182 183# Set a higher timeout value, just in case. 184build:rbe --remote_timeout=3600 185 186# Local disk cache is incompatible with remote execution (for obvious reasons). 187build:rbe --disk_cache="" 188 189# Enable authentication. This will pick up application default credentials by 190# default. You can use --google_credentials=some_file.json to use a service 191# account credential instead. 192build:rbe --google_default_credentials=true 193 194# The user.bazelrc file is not checked in but available for local mods. 195# Always keep this at the end of the file so that user flags override. 196try-import %workspace%/user.bazelrc 197