libabseil breaking changes

conda

68 curated breaking changes across major versions of libabseil. Use this as a migration checklist before bumping dependencies.

View package health \u2192 Known bugs \u2192

changes

Breaking changes by transition

20250814.2 \u2192 20260107.1breaking
**Mutex Deprecations**: Legacy `Mutex` methods and `MutexLock` pointer constructors have been marked as [deprecated](https://github.com/abseil/abseil-cpp/commit/6d8e1a5cf00d6a6b26069b0baf0dd9b855a17459#diff-c9e802b6d2763c9075a33c68d86aa3352e795e6c2213b9a73bdf58c2ad9641e6). Users should migrate to the recommended APIs.
20250814.2 \u2192 20260107.1breaking
The polyfill type `absl::string_view` is now an alias for `std::string_view` in all builds. (https://github.com/abseil/abseil-cpp/commit/9ebd93a7745858d32f23e3ca07d0e0fdc44d8dc2) Baseline: 1e566d994bed60562636342af11b38b8de8d0197 Cherry-pick: d9d76ba372a0a2d553ca40cf75e973d2a696230e Cherry-pick: a3bf78f68584df7ff1304291a64e162266b072ac Cherry-pick: 7313246786857168dac4c3191e80843b58e294c3 (Patch 1) Cherry-pick: 5b086d78c4424ab03771e2eed85a356082d4c7ae (Patch 1)
20250814.1 \u2192 20260107.0breaking
The polyfill type `absl::string_view` is now an alias for `std::string_view` in all builds. (https://github.com/abseil/abseil-cpp/commit/9ebd93a7745858d32f23e3ca07d0e0fdc44d8dc2) Baseline: 1e566d994bed60562636342af11b38b8de8d0197 Cherry-pick: d9d76ba372a0a2d553ca40cf75e973d2a696230e Cherry-pick: a3bf78f68584df7ff1304291a64e162266b072ac
20250814.1 \u2192 20260107.0breaking
**Mutex Deprecations**: Legacy `Mutex` methods and `MutexLock` pointer constructors have been marked as [deprecated](https://github.com/abseil/abseil-cpp/commit/6d8e1a5cf00d6a6b26069b0baf0dd9b855a17459#diff-c9e802b6d2763c9075a33c68d86aa3352e795e6c2213b9a73bdf58c2ad9641e6). Users should migrate to the recommended APIs.
20250512.2 \u2192 20250814.2breaking
`absl::string_view(nullptr)`, which is [undefined behavior](https://cppreference.com/w/cpp/string/basic_string_view/basic_string_view.html) according to the C++ standard, now triggers an [`assert` failure](https://github.com/abseil/abseil-cpp/commit/61103b948d587aff46f259a23bfa7e28385561e7). Note that unless you changed [`absl/base/options.h`](https://github.com/abseil/abseil-cpp/blob/fece33c9057c7b9952eb05ec4180fd2dd3de53a7/absl/base/options.h#L76-L100), `absl::string_view` is an alias for `std
20250512.2 \u2192 20250814.2breaking
Nullability template types, which were [deprecated](https://github.com/abseil/abseil-cpp/commit/caf854d58c061808bae2a41f2b7da21a3ba74028) in the May 2025 release, [have been removed](https://github.com/abseil/abseil-cpp/commit/e4c43850ad008b362b53622cb3c88fd915d8f714).
20250512.2 \u2192 20250814.2breaking
Abseil's hash tables now [require](https://github.com/abseil/abseil-cpp/commit/7ece455c2527fa7f001a5f734a7efa42df4e767a) a hash function that has a return type with size >= `sizeof(size_t)`. Baseline: 987c57f325f7fa8472fa84e1f885f7534d391b0d Cherry-pick: d38452e1ee03523a208362186fd42248ff2609f6 (Patch 1) Cherry-pick: 7313246786857168dac4c3191e80843b58e294c3 (Patch 2)
20250814.0 \u2192 20250814.1breaking
`absl::string_view(nullptr)`, which is [undefined behavior](https://cppreference.com/w/cpp/string/basic_string_view/basic_string_view.html) according to the C++ standard, now triggers an [`assert` failure](https://github.com/abseil/abseil-cpp/commit/61103b948d587aff46f259a23bfa7e28385561e7). Note that unless you changed [`absl/base/options.h`](https://github.com/abseil/abseil-cpp/blob/fece33c9057c7b9952eb05ec4180fd2dd3de53a7/absl/base/options.h#L76-L100), `absl::string_view` is an alias for `std
20250814.0 \u2192 20250814.1breaking
Nullability template types, which were [deprecated](https://github.com/abseil/abseil-cpp/commit/caf854d58c061808bae2a41f2b7da21a3ba74028) in the May 2025 release, [have been removed](https://github.com/abseil/abseil-cpp/commit/e4c43850ad008b362b53622cb3c88fd915d8f714).
20250814.0 \u2192 20250814.1breaking
Abseil's hash tables now [require](https://github.com/abseil/abseil-cpp/commit/7ece455c2527fa7f001a5f734a7efa42df4e767a) a hash function that has a return type with size >= `sizeof(size_t)`. Baseline: 987c57f325f7fa8472fa84e1f885f7534d391b0d Cherry-pick: d38452e1ee03523a208362186fd42248ff2609f6 (Patch 1)
20250512.1 \u2192 20250814.0breaking
Abseil's hash tables now [require](https://github.com/abseil/abseil-cpp/commit/7ece455c2527fa7f001a5f734a7efa42df4e767a) a hash function that has a return type with size >= `sizeof(size_t)`.
20250512.1 \u2192 20250814.0breaking
`absl::string_view(nullptr)`, which is [undefined behavior](https://cppreference.com/w/cpp/string/basic_string_view/basic_string_view.html) according to the C++ standard, now triggers an [`assert` failure](https://github.com/abseil/abseil-cpp/commit/61103b948d587aff46f259a23bfa7e28385561e7). Note that unless you changed [`absl/base/options.h`](https://github.com/abseil/abseil-cpp/blob/fece33c9057c7b9952eb05ec4180fd2dd3de53a7/absl/base/options.h#L76-L100), `absl::string_view` is an alias for `std
20250512.1 \u2192 20250814.0breaking
Nullability template types, which were [deprecated](https://github.com/abseil/abseil-cpp/commit/caf854d58c061808bae2a41f2b7da21a3ba74028) in the May 2025 release, [have been removed](https://github.com/abseil/abseil-cpp/commit/e4c43850ad008b362b53622cb3c88fd915d8f714).
20250127.2 \u2192 20250512.2breaking
Abseil now requires at least C++17 and follows [Google's Foundational C++ Support Policy](https://opensource.google/documentation/policies/cplusplus-support). See [this table](https://github.com/google/oss-policies-info/blob/main/foundational-cxx-support-matrix.md) for a list of currently supported versions compilers, platforms, and build tools.
20250127.2 \u2192 20250512.2breaking
Nullability template types are deprecated and will be removed in a future release. The macro-style annotations (`absl_nonnull`, `absl_nullable`) should be used instead (https://github.com/abseil/abseil-cpp/commit/caf854d58c061808bae2a41f2b7da21a3ba74028).
20250512.0 \u2192 20250512.1breaking
Nullability template types are deprecated and will be removed in a future release. The macro-style annotations (`absl_nonnull`, `absl_nullable`) should be used instead (https://github.com/abseil/abseil-cpp/commit/caf854d58c061808bae2a41f2b7da21a3ba74028).
20250512.0 \u2192 20250512.1breaking
Abseil now requires at least C++17 and follows [Google's Foundational C++ Support Policy](https://opensource.google/documentation/policies/cplusplus-support). See [this table](https://github.com/google/oss-policies-info/blob/main/foundational-cxx-support-matrix.md) for a list of currently supported versions compilers, platforms, and build tools.
20250127.1 \u2192 20250512.0breaking
Nullability template types are deprecated and will be removed in a future release. The macro-style annotations (`absl_nonnull`, `absl_nullable`) should be used instead (https://github.com/abseil/abseil-cpp/commit/caf854d58c061808bae2a41f2b7da21a3ba74028).
20250127.1 \u2192 20250512.0breaking
Abseil now requires at least C++17 and follows [Google's Foundational C++ Support Policy](https://opensource.google/documentation/policies/cplusplus-support). See [this table](https://github.com/google/oss-policies-info/blob/main/foundational-cxx-support-matrix.md) for a list of currently supported versions compilers, platforms, and build tools.
20240722.1 \u2192 20250127.rc1breaking
Bazel `BUILD` files now reference repositories by their canonical names from the Bazel Central Registry. For example, Abseil is now `@abseil-cpp` instead of `@com_google_absl`, and GoogleTest is now `@googletest` instead of `@com_google_googletest`. Users still using the old `WORKSPACE` system may need to use `repo_mapping` on repositories that still use the old names. See https://github.com/abseil/abseil-cpp/commit/90a7ba66e88bf1b6fe98b196208448704766dac0 for an example.
20240722.2 \u2192 20250127.2breaking
Bazel `BUILD` files now reference repositories by their canonical names from the Bazel Central Registry. For example, Abseil is now `@abseil-cpp` instead of `@com_google_absl`, and GoogleTest is now `@googletest` instead of `@com_google_googletest`. Users still using the old `WORKSPACE` system may need to use `repo_mapping` on repositories that still use the old names. See https://github.com/abseil/abseil-cpp/commit/90a7ba66e88bf1b6fe98b196208448704766dac0 for an example.
20250127.0 \u2192 20250127.1breaking
Bazel `BUILD` files now reference repositories by their canonical names from the Bazel Central Registry. For example, Abseil is now `@abseil-cpp` instead of `@com_google_absl`, and GoogleTest is now `@googletest` instead of `@com_google_googletest`. Users still using the old `WORKSPACE` system may need to use `repo_mapping` on repositories that still use the old names. See https://github.com/abseil/abseil-cpp/commit/90a7ba66e88bf1b6fe98b196208448704766dac0 for an example.
20250127.rc1 \u2192 20250127.0breaking
Bazel `BUILD` files now reference repositories by their canonical names from the Bazel Central Registry. For example, Abseil is now `@abseil-cpp` instead of `@com_google_absl`, and GoogleTest is now `@googletest` instead of `@com_google_googletest`. Users still using the old `WORKSPACE` system may need to use `repo_mapping` on repositories that still use the old names. See https://github.com/abseil/abseil-cpp/commit/90a7ba66e88bf1b6fe98b196208448704766dac0 for an example.
20260107.0 \u2192 20240722.2breaking
The deprecated symbol `absl::kuint128max` [has been removed](https://github.com/abseil/abseil-cpp/commit/34604d5b1f6ae14c65b3992478b59f7108051979) and should be replaced with `absl::Uint128Max()`.
20260107.0 \u2192 20240722.2breaking
[`absl::StrJoin` now has a `absl::string_view` overload.](https://github.com/abseil/abseil-cpp/commit/73841853760d6f86f5fe0372f17b2456874b6399) This allows for passing a collection of string-like objects without having to convert everything to the same type first. However, this may be a breaking change for users passing an explicit template argument to `absl::StrJoin`. In this case, simply remove the explicit template parameter.
20260107.0 \u2192 20240722.2breaking
[`vlog_is_on.h` is now a public header](https://github.com/abseil/abseil-cpp/commit/d0d902e6e1dcfec1e861bddee00e30fa04d4084d) and is no longer included from `log.h`. To use `VLOG_IS_ON()`, `absl/log/vlog_is_on.h` must be included.
20260107.0 \u2192 20240722.2breaking
[`absl::AlphaNum` no longer allows brace-initialization.](https://github.com/abseil/abseil-cpp/commit/2be67701e7a33b45d322064349827e1155953338) This was never intended to be supported, nor is it recommended that `absl::AlphaNum` ever be spelled in user code.
20260107.0 \u2192 20240722.2breaking
`absl::aligned_storage_t`, which was a polyfill consistent with `std::aligned_storage_t`, [has been removed](https://github.com/abseil/abseil-cpp/commit/42133464db0ae5383fef723067835ef768b849f8). `std::aligned_storage_t` is deprecated in C++23. See https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p1413r3.pdf for a suggested replacement.
20240116.3 \u2192 20240722.1breaking
[`absl::AlphaNum` no longer allows brace-initialization.](https://github.com/abseil/abseil-cpp/commit/2be67701e7a33b45d322064349827e1155953338) This was never intended to be supported, nor is it recommended that `absl::AlphaNum` ever be spelled in user code.
20240116.3 \u2192 20240722.1breaking
The deprecated symbol `absl::kuint128max` [has been removed](https://github.com/abseil/abseil-cpp/commit/34604d5b1f6ae14c65b3992478b59f7108051979) and should be replaced with `absl::Uint128Max()`.
20240116.3 \u2192 20240722.1breaking
`absl::aligned_storage_t`, which was a polyfill consistent with `std::aligned_storage_t`, [has been removed](https://github.com/abseil/abseil-cpp/commit/42133464db0ae5383fef723067835ef768b849f8). `std::aligned_storage_t` is deprecated in C++23. See https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p1413r3.pdf for a suggested replacement.
20240116.3 \u2192 20240722.1breaking
[`vlog_is_on.h` is now a public header](https://github.com/abseil/abseil-cpp/commit/d0d902e6e1dcfec1e861bddee00e30fa04d4084d) and is no longer included from `log.h`. To use `VLOG_IS_ON()`, `absl/log/vlog_is_on.h` must be included.
20240116.3 \u2192 20240722.1breaking
[`absl::StrJoin` now has a `absl::string_view` overload.](https://github.com/abseil/abseil-cpp/commit/73841853760d6f86f5fe0372f17b2456874b6399) This allows for passing a collection of string-like objects without having to convert everything to the same type first. However, this may be a breaking change for users passing an explicit template argument to `absl::StrJoin`. In this case, simply remove the explicit template parameter.
20240116.2 \u2192 20240722.0breaking
The deprecated symbol `absl::kuint128max` [has been removed](https://github.com/abseil/abseil-cpp/commit/34604d5b1f6ae14c65b3992478b59f7108051979) and should be replaced with `absl::Uint128Max()`.
20240116.2 \u2192 20240722.0breaking
[`absl::StrJoin` now has a `absl::string_view` overload.](https://github.com/abseil/abseil-cpp/commit/73841853760d6f86f5fe0372f17b2456874b6399) This allows for passing a collection of string-like objects without having to convert everything to the same type first. However, this may be a breaking change for users passing an explicit template argument to `absl::StrJoin`. In this case, simply remove the explicit template parameter.
20240116.2 \u2192 20240722.0breaking
[`vlog_is_on.h` is now a public header](https://github.com/abseil/abseil-cpp/commit/d0d902e6e1dcfec1e861bddee00e30fa04d4084d) and is no longer included from `log.h`. To use `VLOG_IS_ON()`, `absl/log/vlog_is_on.h` must be included.
20240116.2 \u2192 20240722.0breaking
[`absl::AlphaNum` no longer allows brace-initialization.](https://github.com/abseil/abseil-cpp/commit/2be67701e7a33b45d322064349827e1155953338) This was never intended to be supported, nor is it recommended that `absl::AlphaNum` ever be spelled in user code.
20240116.2 \u2192 20240722.0breaking
`absl::aligned_storage_t`, which was a polyfill consistent with `std::aligned_storage_t`, [has been removed](https://github.com/abseil/abseil-cpp/commit/42133464db0ae5383fef723067835ef768b849f8). `std::aligned_storage_t` is deprecated in C++23. See https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p1413r3.pdf for a suggested replacement.
20230802.3 \u2192 20240116.3breaking
`absl::weak_equality` and `absl::strong_equality` have been removed. The corresponding `std` types were removed before C++20 was finalized (https://wg21.link/P1959R0).
20230802.3 \u2192 20240116.3breaking
`AbslHashValue()` [no longer accepts C-style arrays as a parameter](https://github.com/abseil/abseil-cpp/commit/1415840502f38952e63c1c6e4892f6e69ce7bc13). Previously the array would decay to a pointer type, which could lead to subtle, unintended bugs. The most common potential error is passing a C-string literal. After this change, these call-sites require wrapping the literal in `absl::string_view`.
20240116.1 \u2192 20240116.2breaking
`AbslHashValue()` [no longer accepts C-style arrays as a parameter](https://github.com/abseil/abseil-cpp/commit/1415840502f38952e63c1c6e4892f6e69ce7bc13). Previously the array would decay to a pointer type, which could lead to subtle, unintended bugs. The most common potential error is passing a C-string literal. After this change, these call-sites require wrapping the literal in `absl::string_view`.
20240116.1 \u2192 20240116.2breaking
`absl::weak_equality` and `absl::strong_equality` have been removed. The corresponding `std` types were removed before C++20 was finalized (https://wg21.link/P1959R0).
20230802.2 \u2192 20240116.1breaking
`absl::weak_equality` and `absl::strong_equality` have been removed. The corresponding `std` types were removed before C++20 was finalized (https://wg21.link/P1959R0).
20230802.2 \u2192 20240116.1breaking
`AbslHashValue()` [no longer accepts C-style arrays as a parameter](https://github.com/abseil/abseil-cpp/commit/1415840502f38952e63c1c6e4892f6e69ce7bc13). Previously the array would decay to a pointer type, which could lead to subtle, unintended bugs. The most common potential error is passing a C-string literal. After this change, these call-sites require wrapping the literal in `absl::string_view`.
20230802.1 \u2192 20240116.0breaking
`absl::weak_equality` and `absl::strong_equality` have been removed. The corresponding `std` types were removed before C++20 was finalized (https://wg21.link/P1959R0).
20230802.1 \u2192 20240116.0breaking
`AbslHashValue()` [no longer accepts C-style arrays as a parameter](https://github.com/abseil/abseil-cpp/commit/1415840502f38952e63c1c6e4892f6e69ce7bc13). Previously the array would decay to a pointer type, which could lead to subtle, unintended bugs. The most common potential error is passing a C-string literal. After this change, these call-sites require wrapping the literal in `absl::string_view`.
20240722.0 \u2192 20230802.3breaking
None known at this time.
20230125.4 \u2192 20230802.2breaking
None known at this time.
20230802.0 \u2192 20230802.1breaking
None known at this time.
20230125.3 \u2192 20230802.0breaking
None known at this time.
20220623.2 \u2192 20230125.4breaking
Abseil now requires at least C++14 and follows [Google's Foundational C++ Support Policy](https://opensource.google/documentation/policies/cplusplus-support). See [this table](https://github.com/google/oss-policies-info/blob/main/foundational-cxx-support-matrix.md) for a list of currently supported versions compilers, platforms, and build tools.
20220623.2 \u2192 20230125.4breaking
The legacy spellings of the thread annotation macros/functions (e.g. `GUARDED_BY()`) [have been removed by default](https://github.com/abseil/abseil-cpp/commit/6acb60c161f1203e6eca929b87f2041da7714bfe) in favor of the `ABSL_` prefixed versions (e.g. `ABSL_GUARDED_BY()`) due to clashes with other libraries. The compatibility macro `ABSL_LEGACY_THREAD_ANNOTATIONS` can be defined on the compile command-line to temporarily restore these spellings, but this compatibility macro will be removed in the
20230125.2 \u2192 20230125.3breaking
The legacy spellings of the thread annotation macros/functions (e.g. `GUARDED_BY()`) [have been removed by default](https://github.com/abseil/abseil-cpp/commit/6acb60c161f1203e6eca929b87f2041da7714bfe) in favor of the `ABSL_` prefixed versions (e.g. `ABSL_GUARDED_BY()`) due to clashes with other libraries. The compatibility macro `ABSL_LEGACY_THREAD_ANNOTATIONS` can be defined on the compile command-line to temporarily restore these spellings, but this compatibility macro will be removed in the
20230125.2 \u2192 20230125.3breaking
Abseil now requires at least C++14 and follows [Google's Foundational C++ Support Policy](https://opensource.google/documentation/policies/cplusplus-support). See [this table](https://github.com/google/oss-policies-info/blob/main/foundational-cxx-support-matrix.md) for a list of currently supported versions compilers, platforms, and build tools.
20230125.1 \u2192 20230125.2breaking
The legacy spellings of the thread annotation macros/functions (e.g. `GUARDED_BY()`) [have been removed by default](https://github.com/abseil/abseil-cpp/commit/6acb60c161f1203e6eca929b87f2041da7714bfe) in favor of the `ABSL_` prefixed versions (e.g. `ABSL_GUARDED_BY()`) due to clashes with other libraries. The compatibility macro `ABSL_LEGACY_THREAD_ANNOTATIONS` can be defined on the compile command-line to temporarily restore these spellings, but this compatibility macro will be removed in the
20230125.1 \u2192 20230125.2breaking
Abseil now requires at least C++14 and follows [Google's Foundational C++ Support Policy](https://opensource.google/documentation/policies/cplusplus-support). See [this table](https://github.com/google/oss-policies-info/blob/main/foundational-cxx-support-matrix.md) for a list of currently supported versions compilers, platforms, and build tools.
20230125.0 \u2192 20230125.1breaking
The legacy spellings of the thread annotation macros/functions (e.g. `GUARDED_BY()`) [have been removed by default](https://github.com/abseil/abseil-cpp/commit/6acb60c161f1203e6eca929b87f2041da7714bfe) in favor of the `ABSL_` prefixed versions (e.g. `ABSL_GUARDED_BY()`) due to clashes with other libraries. The compatibility macro `ABSL_LEGACY_THREAD_ANNOTATIONS` can be defined on the compile command-line to temporarily restore these spellings, but this compatibility macro will be removed in the
20230125.0 \u2192 20230125.1breaking
Abseil now requires at least C++14 and follows [Google's Foundational C++ Support Policy](https://opensource.google/documentation/policies/cplusplus-support). See [this table](https://github.com/google/oss-policies-info/blob/main/foundational-cxx-support-matrix.md) for a list of currently supported versions compilers, platforms, and build tools.
20220623.1 \u2192 20230125.0breaking
Abseil now requires at least C++14 and follows [Google's Foundational C++ Support Policy](https://opensource.google/documentation/policies/cplusplus-support). See [this table](https://github.com/google/oss-policies-info/blob/main/foundational-cxx-support-matrix.md) for a list of currently supported versions compilers, platforms, and build tools.
20220623.1 \u2192 20230125.0breaking
The legacy spellings of the thread annotation macros/functions (e.g. `GUARDED_BY()`) [have been removed by default](https://github.com/abseil/abseil-cpp/commit/6acb60c161f1203e6eca929b87f2041da7714bfe) in favor of the `ABSL_` prefixed versions (e.g. `ABSL_GUARDED_BY()`) due to clashes with other libraries. The compatibility macro `ABSL_LEGACY_THREAD_ANNOTATIONS` can be defined on the compile command-line to temporarily restore these spellings, but this compatibility macro will be removed in the
20240116.0 \u2192 20220623.2breaking
The `ABSL_DEPRECATED` macro now works with the GCC compiler. GCC users that are experiencing new warnings can use `-Wno-deprecated-declatations` silence the warnings or use `-Wno-error=deprecated-declarations` to see warnings but not fail the build.
20240116.0 \u2192 20220623.2breaking
`ABSL_CONST_INIT` uses the C++20 keyword `constinit` when available. [Some compilers are more strict about where this keyword must appear compared to the pre-C++20 implementation.](https://github.com/abseil/abseil-cpp/blob/273292d1cfc0a94a65082ee350509af1d113344d/absl/base/attributes.h#L679-L717)
20240116.0 \u2192 20220623.2breaking
Bazel builds now depend on the [bazelbuild/bazel-skylib](https://github.com/bazelbuild/bazel-skylib) repository. See Abseil's [WORKSPACE](https://github.com/abseil/abseil-cpp/blob/273292d1cfc0a94a65082ee350509af1d113344d/WORKSPACE#L48-L53) file for an example of how to add this dependency.
20240116.0 \u2192 20220623.2breaking
CMake builds now use the flag [`ABSL_BUILD_TESTING`](https://github.com/abseil/abseil-cpp/commit/fb7dd24b18e82893e5922be5d1c8ae0f3fe3c9fa) (default: `OFF`) to control whether or not unit tests are built.
unknown \u2192 20220623.1breaking
CMake builds now use the flag [`ABSL_BUILD_TESTING`](https://github.com/abseil/abseil-cpp/commit/fb7dd24b18e82893e5922be5d1c8ae0f3fe3c9fa) (default: `OFF`) to control whether or not unit tests are built.
unknown \u2192 20220623.1breaking
The `ABSL_DEPRECATED` macro now works with the GCC compiler. GCC users that are experiencing new warnings can use `-Wno-deprecated-declatations` silence the warnings or use `-Wno-error=deprecated-declarations` to see warnings but not fail the build.
unknown \u2192 20220623.1breaking
`ABSL_CONST_INIT` uses the C++20 keyword `constinit` when available. [Some compilers are more strict about where this keyword must appear compared to the pre-C++20 implementation.](https://github.com/abseil/abseil-cpp/blob/273292d1cfc0a94a65082ee350509af1d113344d/absl/base/attributes.h#L679-L717)
unknown \u2192 20220623.1breaking
Bazel builds now depend on the [bazelbuild/bazel-skylib](https://github.com/bazelbuild/bazel-skylib) repository. See Abseil's [WORKSPACE](https://github.com/abseil/abseil-cpp/blob/273292d1cfc0a94a65082ee350509af1d113344d/WORKSPACE#L48-L53) file for an example of how to add this dependency.

API access

Get this data programmatically \u2014 free, no authentication.

curl https://depscope.dev/api/breaking/conda/libabseil