Abseil Support

The C++ implementation of Protocol Buffers has an explicit dependency on Abseil.

In version 22.x, C++ protobuf added an explicit dependency on Abseil.

Bazel Support

If you are using Bazel, to determine the version of Abseil that your protobuf version supports, you can use the bazel mod command:

$ bazel mod deps abseil-cpp --enable_bzlmod
<root> (protobuf@30.0-dev)
└───abseil-cpp@20240722.0
    β”œβ”€β”€β”€bazel_skylib@1.7.1
    β”œβ”€β”€β”€googletest@1.15.2
    └───platforms@0.0.10

bazel mod graph produces the full output:

$ bazel mod graph --enable_bzlmod
<root> (protobuf@30.0-dev)
β”œβ”€β”€β”€abseil-cpp@20240722.0
β”‚   β”œβ”€β”€β”€bazel_skylib@1.7.1 (*)
β”‚   β”œβ”€β”€β”€googletest@1.15.2 (*)
β”‚   └───platforms@0.0.10 (*)
β”œβ”€β”€β”€bazel_features@1.18.0
β”‚   └───bazel_skylib@1.7.1 (*)
β”œβ”€β”€β”€bazel_skylib@1.7.1
β”‚   β”œβ”€β”€β”€platforms@0.0.10 (*)
β”‚   └───rules_license@1.0.0 (*)
β”œβ”€β”€β”€googletest@1.15.2
β”‚   β”œβ”€β”€β”€abseil-cpp@20240722.0 (*)
β”‚   β”œβ”€β”€β”€platforms@0.0.10 (*)
β”‚   └───re2@2024-07-02
...

CMake Support

Our CMake support is best-effort compared to Bazel. To check for support, try the following steps:

  1. Run the cmake . command.
  2. Open _deps/absl-src/CMakeLists.txt.

Look for the following line:

project(absl LANGUAGES CXX VERSION 20240722)
set(ABSL_SOVERSION "2407.0.0")
include(CTest)