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https://github.com/carbon-language/carbon-lang.git
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Jon Ross-Perkins
d12583fc08
I'm partly doing this because the current setup would be difficult to share with the toolchain. e.g., ProtoToCarbon isn't explorer-specific, but the only way to run it via CLI is the explorer's fuzzverter. I want a separate tool.
This change:
- Adds a //common/fuzzing:proto_to_carbon tool.
- The rest of fuzzverter is now just //explorer/fuzzing:ast_to_proto.
- The change simplifies overall handling and removes a LLVM CLI dependency.
- Stops allowing unknown fields in the proto.
- This has mostly led to forgetting to remove fuzzer inputs that were for removed features.
- Moves more non-explorer-specific bits to //common/fuzzing.
- Cleans up remaining pieces in //explorer/fuzzing
- Merges the //explorer/fuzzing proto tests, which deduplicates AstToString copies.
- These tests also had duplicate dependencies, etc -- and all complete in ~6s.
- Updates and fixes regen_corpus which was previously broken by other changes.
- Updates the README to reflect changes.
- Removes obsolete proto-fuzzer build configuration (AFAICT this is no longer needed).
78 lines
3.5 KiB
Plaintext
78 lines
3.5 KiB
Plaintext
# Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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# Exceptions. See /LICENSE for license information.
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# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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build --crosstool_top=@bazel_cc_toolchain
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build --host_crosstool_top=@bazel_cc_toolchain
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# Default to using a disk cache to minimize re-building LLVM and Clang which we
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# try to avoid updating too frequently to minimize rebuild cost. The location
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# here can be overridden in the user configuration where needed.
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#
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# Note that this cache will grow without bound currently. You should
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# periodically run the `scripts/clean_disk_cache.sh` script or some equivalent.
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# https://github.com/bazelbuild/bazel/issues/5139 tracks fixing this in Bazel.
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build --disk_cache=~/.cache/carbon-lang-build-cache
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# Enable some safety when using the build cache, likely to be defaulted in
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# future Bazel releases.
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build --experimental_guard_against_concurrent_changes
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# Allow the toolchain to configure itself differently in the host build from
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# the target build. Even when the host and target platforms are ostensibly the
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# same (and use identical toolchains), it is beneficial to be able to configure
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# the specific toolchain features enabled for the target separately from the
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# host. For example, sanitizers make sense for the target significantly more
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# than for the host.
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#
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# Bazel bug tracking undoing the default here:
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# https://github.com/bazelbuild/bazel/issues/13315
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build --incompatible_dont_enable_host_nonhost_crosstool_features=false
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# Disable warnings for all external compilations. These involve code that isn't
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# developed as part of Carbon and may be difficult or impossible to patch, so
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# warnings aren't likely to be actionable.
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build --per_file_copt=external/.*\.(c|cc|cpp|cxx)$@-w
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build --host_per_file_copt=external/.*\.(c|cc|cpp|cxx)$@-w
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# Default dynamic linking to off. While this can help build performance in some
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# edge cases with very large linked executables and a slow linker, between using
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# fast linkers on all platforms (LLD and the Apple linker), as well as having
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# relatively few such executables, shared objects simply waste too much space in
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# our builds.
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build --dynamic_mode=off
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# Always compile PIC code. There are few if any disadvantages on the platforms
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# and architectures we care about and it avoids the need to compile files twice.
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build --force_pic
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# Completely disable Bazel's automatic stripping of debug information. Removing
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# that information causes unhelpful backtraces from unittest failures and other
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# crashes. Optimized builds already avoid using debug information by default.
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build --strip=never
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# Enable Abseil for GoogleTest.
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build --define=absl=1
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# Configuration for enabling Address Sanitizer. Note that this is enabled by
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# default for fastbuild. The config is provided to enable ASan even in
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# optimized or other build configurations.
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build:asan --features=asan
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# Configuration for enabling LibFuzzer (along with ASan).
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build:fuzzer --features=fuzzer
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# Always allow tests to symbolize themselves with whatever `llvm-symbolize` is
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# in the users environment.
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build --test_env=ASAN_SYMBOLIZER_PATH
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# Force actions to have a UTF-8 language encoding.
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# TODO: Need to investigate what this should be on Windows, but at least for
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# Linux and macOS this seems strictly better than the Bazel default of just
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# `en_US`.
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build --action_env=LANG=en_US.UTF-8
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# Allow users to override any of the flags desired by importing a user-specific
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# RC file here if present.
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try-import %workspace%/user.bazelrc
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