.bazelrc

# Copyright 2026 The OpenFst Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# Enable logging rc options.
common --announce_rc

# By default, detect the platform and use the platform-specific options below.
build --enable_platform_specific_config

# Disable C++ exceptions.
build --features=-exceptions

# ------------------------------------------------------------------------------
# Compilation-mode options.
# ------------------------------------------------------------------------------

# Tests are very slow with default `-O0`.
build:dev --copt=-O1

# ------------------------------------------------------------------------------
# Per-plaform options for toolchains using GCC or clang.
# ------------------------------------------------------------------------------

build:gcc_clang --cxxopt=-std=c++17
build:gcc_clang --cxxopt=-Wno-sign-compare
build:gcc_clang --cxxopt=-Wno-deprecated-declarations
# TODO: b/476056201 - This warning is enabled in Google, so unclear why it is
# failing here.  Investigate, fix, and re-enable.
build:gcc_clang --cxxopt=-Wno-overloaded-virtual

# Temporarily disabled warnings that we would like to turn on.
build:gcc_clang --cxxopt=-Wno-defaulted-function-deleted
build:gcc_clang --cxxopt=-Wno-nullability-completeness

# WORKAROUND: GCC 15+ assembler generates `.sframe` stack trace sections by
# default.  The linker fails to handle `.sframe` references correctly during
# COMDAT section discarding ("relocation refers to local symbol... which is
# defined in a discarded section").  We disable `.sframe` generation in the
# assembler to fix the build.  This can be removed when it no longer gives
# an error on gLinux Rodete.  gcc 15.2.0 and binutils 2.45 gives an error.
# TOD0: b/491436022 - Try again with binutils 2.46.
build:host_gcc --cxxopt=-Wa,--gsframe=no

# ------------------------------------------------------------------------------
# Options for Linux.
# ------------------------------------------------------------------------------

build:linux --config=gcc_clang

# ------------------------------------------------------------------------------
# Options for macOS.
# ------------------------------------------------------------------------------

# Sets the default Apple platform to macOS.
build --apple_platform_type=macos

build:macos --config=gcc_clang
build:macos --cxxopt=-Wno-dangling-field
build:macos --cxxopt=-mmacos-version-min=10.15

# ------------------------------------------------------------------------------
# Options for Windows.
# ------------------------------------------------------------------------------

build:windows --cxxopt=/std:c++17

# Force compiler to (1) read the sources in UTF8 instead of Windows system's
# default local code page and (2) encode all string literals as UTF8 during
# execution.
build:windows --cxxopt=-utf-8

# Signed/unsigned mismatch.
build:windows --cxxopt=/wd4018
build:windows --cxxopt=/wd4389

# Suppress deprecated declaration warnings.
build:windows --cxxopt=/wd4996

# Make sure to include as little of <windows.h> as possible.
build:windows --copt=-DWIN32_LEAN_AND_MEAN
build:windows --copt=-DNOGDI

# https://learn.microsoft.com/en-us/cpp/c-runtime-library/math-constants?view=msvc-170
build:windows --copt=/D_USE_MATH_DEFINES

# https://devblogs.microsoft.com/cppblog/announcing-full-support-for-a-c-c-conformant-preprocessor-in-msvc/
# otherwise, there will be some compiling error due to preprocessing.
build:windows --copt=/Zc:preprocessor

# Increase linker stack size.
build:windows --linkopt=/STACK:8388608

# Enable the runfiles tree on Windows. The unit tests cannot find the test data
# otherwise.
build:windows --enable_runfiles

# Enable symlinks, per https://bazel.build/configure/windows#symlink.
startup --windows_enable_symlinks

# ------------------------------------------------------------------------------
# Options for --config=gcc, gcc_old, llvm, and llvm_old.
# ------------------------------------------------------------------------------
# NOTE: GCC toolchains are broken with Bazel 9 until
# https://github.com/bazelbuild/bazel-central-registry/pull/7391
# is merged.
build:gcc --extra_toolchains=@gcc_toolchain_cur//:all
build:gcc_old --extra_toolchains=@gcc_toolchain_old//:all
# If `--config=llvm` fails with `libxml2.so.2` errors, install `libxml2`
# manually using `apt install libxml2` or similar.
# https://github.com/bazel-contrib/toolchains_llvm/issues/657#issuecomment-3786505615
build:llvm --extra_toolchains=@llvm_toolchain_cur//:all
build:llvm --linkopt=-fuse-ld=lld
build:llvm_old --extra_toolchains=@llvm_toolchain_old//:all
build:llvm_old --linkopt=-fuse-ld=lld

# ------------------------------------------------------------------------------
# Options for benchmarking.
# ------------------------------------------------------------------------------

# It's useless to benchmark a debug build.
build:benchmark --compilation_mode=opt
# Link the benchmark binary statically, even if it's a `cc_test`.
# The default link mode for `cc_test` is dynamic.
build:benchmark --dynamic_mode=off
# Generate line table debug info for profiling.
build:benchmark --copt=-gmlt