-- 1801102e11205861bc063e067e9fd4754b625c5a by Derek Mauro <dmauro@google.com>: Internal change PiperOrigin-RevId: 398562681 -- 485008445725d4013f60f4b2876f84b6b47932ec by Jorg Brown <jorg@google.com>: Replace calls to std::isinf with comparison against max(). PiperOrigin-RevId: 398534255 -- 9b99d074d39ad677cf92f99549d22bb73f504f8f by Saleem Abdulrasool <abdulras@google.com>: debugging: add support for non-glibc targets for debugging This relaxes the ELF mem_image handling and subsequently enables the VDSO support for non-glibc targets. The primary need for the restriction was the use of the `__GLIBC_PREREQ` macro. If it is undefined, assume that the glibc pre-requisite is unavailable. This allows building the debugging_internal target on musl targets. PiperOrigin-RevId: 398499050 -- 3cc3630ef2226ae1981a944573f0f9c27a527ebf by Abseil Team <absl-team@google.com>: Replace usages of `auto` with proper typedefs. PiperOrigin-RevId: 398479551 GitOrigin-RevId: 1801102e11205861bc063e067e9fd4754b625c5a Change-Id: Ib13e8612d1b263b9c1ae7f56a9f394b24c3add2e
Abseil - C++ Common Libraries
The repository contains the Abseil C++ library code. Abseil is an open-source collection of C++ code (compliant to C++11) designed to augment the C++ standard library.
Table of Contents
About Abseil
Abseil is an open-source collection of C++ library code designed to augment the C++ standard library. The Abseil library code is collected from Google's own C++ code base, has been extensively tested and used in production, and is the same code we depend on in our daily coding lives.
In some cases, Abseil provides pieces missing from the C++ standard; in others, Abseil provides alternatives to the standard for special needs we've found through usage in the Google code base. We denote those cases clearly within the library code we provide you.
Abseil is not meant to be a competitor to the standard library; we've just found that many of these utilities serve a purpose within our code base, and we now want to provide those resources to the C++ community as a whole.
Quickstart
If you want to just get started, make sure you at least run through the Abseil Quickstart. The Quickstart contains information about setting up your development environment, downloading the Abseil code, running tests, and getting a simple binary working.
Building Abseil
Bazel and CMake are the official build systems for Abseil.
See the quickstart for more information on building Abseil using the Bazel build system.
If you require CMake support, please check the CMake build instructions and CMake Quickstart.
Support
Abseil is officially supported on many platforms. See the Abseil platform support guide for details on supported operating systems, compilers, CPUs, etc.
Codemap
Abseil contains the following C++ library components:
baseAbseil Fundamentals
Thebaselibrary contains initialization code and other code which all other Abseil code depends on. Code withinbasemay not depend on any other code (other than the C++ standard library).algorithm
Thealgorithmlibrary contains additions to the C++<algorithm>library and container-based versions of such algorithms.cleanup
Thecleanuplibrary contains the control-flow-construct-like typeabsl::Cleanupwhich is used for executing a callback on scope exit.container
Thecontainerlibrary contains additional STL-style containers, including Abseil's unordered "Swiss table" containers.debugging
Thedebugginglibrary contains code useful for enabling leak checks, and stacktrace and symbolization utilities.hash
Thehashlibrary contains the hashing framework and default hash functor implementations for hashable types in Abseil.memory
Thememorylibrary contains C++11-compatible versions ofstd::make_unique()and related memory management facilities.meta
Themetalibrary contains C++11-compatible versions of type checks available within C++14 and C++17 versions of the C++<type_traits>library.numeric
Thenumericlibrary contains C++11-compatible 128-bit integers.profiling
Theprofilinglibrary contains utility code for profiling C++ entities. It is currently a private dependency of other Abseil libraries.status
Thestatuscontains abstractions for error handling, specificallyabsl::Statusandabsl::StatusOr<T>.strings
Thestringslibrary contains a variety of strings routines and utilities, including a C++11-compatible version of the C++17std::string_viewtype.synchronization
Thesynchronizationlibrary contains concurrency primitives (Abseil'sabsl::Mutexclass, an alternative tostd::mutex) and a variety of synchronization abstractions.time
Thetimelibrary contains abstractions for computing with absolute points in time, durations of time, and formatting and parsing time within time zones.types
Thetypeslibrary contains non-container utility types, like a C++11-compatible version of the C++17std::optionaltype.utility
Theutilitylibrary contains utility and helper code.
Releases
Abseil recommends users "live-at-head" (update to the latest commit from the master branch as often as possible). However, we realize this philosophy doesn't work for every project, so we also provide Long Term Support Releases to which we backport fixes for severe bugs. See our release management document for more details.
License
The Abseil C++ library is licensed under the terms of the Apache license. See LICENSE for more information.
Links
For more information about Abseil:
- Consult our Abseil Introduction
- Read Why Adopt Abseil to understand our design philosophy.
- Peruse our Abseil Compatibility Guarantees to understand both what we promise to you, and what we expect of you in return.