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Chandler CarruthandJon Ross-Perkins
b51dc7f8e2
This adds a defined Carbon version to the Bazel build and codebase that can be used both to implement features like version checks and to report a meaningful version on the command line. This replaces a hard-coded string and a TODO in the driver. As part of this, it adds support for defining the version in Bazel, and special build flags for overriding relevant parts such as the pre-release marker used. The exact structure and meaning of our version string, including the pre-release parts, is implemented here in line with the draft proposal: https://docs.google.com/document/d/11S5VAPe5Pm_BZPlajWrqDDVr9qc7-7tS2VshqO0wWkk/edit?resourcekey=0-2YFC9Uvl4puuDnWlr2MmYw This also introduces a workspace status command to the repository to extract the git commit SHA and other information when building, and the logic to stamp that into binaries as part of the version string when useful. The technique used leverages weak symbols with whole archive linking to allow a link-time override of unstamped data with stamped data in the leaf executable. This makes building with `--stamp` a reasonable default, especially for development builds. The CI system is explicitly opted out of this as there it has no benefit. Last but not least, all of these are wired into the install rules so that we build installable packages with the version number in a conventional place in the directory and filename. --------- Co-authored-by: Jon Ross-Perkins <jperkins@google.com>
28 lines
788 B
C++
28 lines
788 B
C++
// 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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#ifndef CARBON_COMMON_VERSION_H_
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#define CARBON_COMMON_VERSION_H_
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#include "llvm/ADT/StringRef.h"
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namespace Carbon {
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struct Version {
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static const int Major;
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static const int Minor;
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static const int Patch;
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static const llvm::StringLiteral String;
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// A dedicated version information string to use in the toolchain as its
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// command line rendered version. Composed centrally so it can be composed at
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// compile time with potentially build info stamped components.
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static const llvm::StringLiteral ToolchainInfo;
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};
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} // namespace Carbon
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#endif // CARBON_COMMON_VERSION_H_
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