Unlike Arena::CreateMessage, Arena::Create creates only the top level object
from arena even if it is arena constructalble; e.g. messages, RepeatedPtrField,
etc. This renders arenas less effective.
Instead of asking users to be aware of such nuances to use the right API for
the right type, this CL makes Arena::Create recognizes and fully supports arena
constructable types.
While extremly rare, some users try to emulate Arena::CreateMessage with
Arena::Create by passing arena parameter twice. For example,
```
auto foo = Arena::Create<Foo>(&arena, &arena); // bad
```
This pattern is not supported and will break after this change. The following
is recommended instead.
```
auto foo = Arena::CreateMessage<Foo>(&arena); // recommended
auto foo = Arena::Create<Foo>(&arena); // after this change
```
PiperOrigin-RevId: 585709990
This additional if is necessary as of abseil 20230125.3 when abseil is consumed via add_subdirectory,
the abseil_dll target is named abseil_dll, while if abseil is consumed via find_package, the target is called `absl::abseil_dll` .
Once https://github.com/abseil/abseil-cpp/pull/1466 is merged and released in the minimum version of abseil required by protobuf, it is possible to always link `absl::abseil_dll` and `absl::abseil_test_dll` and remove the if.
You may wonder how linking worked at all before when `protobuf_ABSL_PROVIDER STREQUAL "package"`, as `abseil_dll` was not an imported target defined by `find_package(absl)`. The reason behind this is that if a name that is not an imported target is passed to `target_link_libraries`, it is just regarded as a C++ library name. So, in the end the `abseil_dll` library was correctly linked, simply all the transitive usage requirements defined by the `absl::abseil_dll` target were not propagated, that could lead to compilation errors if abseil was compiled with the `ABSL_PROPAGATE_CXX_STD` CMake option enabled.
Closes#12978
COPYBARA_INTEGRATE_REVIEW=https://github.com/protocolbuffers/protobuf/pull/12978 from traversaro:patch-1 39dd074281
PiperOrigin-RevId: 537990391
This deletes our old branches of internal Abseil code in favor of their newly open-sourced library. Notably, this removes the ability to turn CHECK crashes into exceptions.
PiperOrigin-RevId: 504460562
This cl hit an issue during the shared library cmake build from ODR violations, leading to mismatched absl hash seeds. The problem was pre-existing but didn't manifest until now, and can be traced to the fact that in shared library builds we linked Abseil statically. All of the cmake changes here remove the underlying ODR violation.
PiperOrigin-RevId: 485787671
* Sync from Piper @469587494
PROTOBUF_SYNC_PIPER
* Fixing github SOT protoc builds
* Fixing typos from google
* Remove leaked util/hash reference
* Fixing bad python merge
* Fixing python C++ library order
* Proof of concept for Abseil dependency
* Adding most common Abseil libraries
* Fixing shared library breakages
* Switching to quotes over angled brackets
* Disable install target by default
* Fixing abseil to LTS commit
* Upgrade to latest Abseil LTS
* Turning install back on by default, removing unnecessary export statements
* Add note to future self
* Fixing unsafe globals
* Revert "Added cmake abseil include guard"
This reverts commit b6ee841d7c.
* Revert "Update CMake configuration to add a dependency on Abseil (#9793)"
This reverts commit e9246cd789.
* Proof of concept for CMake Abseil dependency
* Hooked up Abseil linking
* Adding test binaries
* Reverting absl::string view use added for testing. This will still be broken for automake and bazel
* Adding new cmake config to dist list
* Whitespace fixes and an attempt at fix for Windows Python Release (CMake version < 3.13)
* Hook up LTS to windows cmake
* Fix 'git cd' typo
* Adding clarifying comment for fix
* Adding abseil dependency to protobuf-lite too
* Update submodules instead of cloning abseil-cpp
* Adding explicit pointer to abseil root directory
Co-authored-by: Jason Lunn <jason.lunn@gmail.com>
Co-authored-by: Jorg Brown <jorg.brown@gmail.com>
Protobuf Team Bot
Silvio Traversaro
Mike Kruskal
Mike Kruskal
Christian Blichmann
Elliotte Rusty Harold
Adam Cozzette
Esun Kim