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- db6fa2aed56380c6708670659c6f8603284fcc4a Rework Abseil cmake/README.md by Abseil Team <absl-team@google.com> - 192c7d3553bc0fe98f6935ccecff48ed785d89f0 Add function attribute ABSL_ATTRIBUTE_FUNC_ALIGN(bytes) t... by Abseil Team <absl-team@google.com> - 1a93e95c71c656add346a0c1771bec26417347ad Internal change by Abseil Team <absl-team@google.com> - 5c6d3e023a8749a5cc89f4cc6b57b6684a28b1c1 Internal change by Shaindel Schwartz <shaindel@google.com> - e415990ea54cf882646b0bc0a75a6e3c6741ce5f Fix testing of UTF8 characters on Windows (https://github... by Abseil Team <absl-team@google.com> GitOrigin-RevId: db6fa2aed56380c6708670659c6f8603284fcc4a Change-Id: I128a7ca751fa207ef272809c1b908568d187c87e
82 lines
3 KiB
Markdown
82 lines
3 KiB
Markdown
# Abseil CMake Build Instructions
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Abseil comes with a CMake build script ([CMakeLists.txt](../CMakeLists.txt))
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that can be used on a wide range of platforms ("C" stands for cross-platform.).
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If you don't have CMake installed already, you can download it for free from
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<http://www.cmake.org/>.
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CMake works by generating native makefiles or build projects that can
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be used in the compiler environment of your choice.
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For API/ABI compatibility reasons, we strongly recommend building Abseil in a
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subdirectory of your project or as an embedded dependency.
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## Incorporating Abseil Into a CMake Project
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The recommendations below are similar to those for using CMake within the
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googletest framework
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(<https://github.com/google/googletest/blob/master/googletest/README.md#incorporating-into-an-existing-cmake-project>)
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### Step-by-Step Instructions
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1. If you haven't done so already, integrate the Abseil dependency
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[CCTZ](https://github.com/google/cctz) into your CMake project. Consequently, the
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target 'cctz' needs to be declared in your CMake project **before** including Abseil.<br>
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Note: If you want to build the Abseil tests, you'll also need [Google Test](https://github.com/google/googletest). To disable Abseil tests, you have to pass
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`-DBUILD_TESTING=OFF` when configuring your project with CMake.
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2. Download Abseil and copy it into a subdirectory in your CMake project or add
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Abseil as a [git submodule](https://git-scm.com/docs/git-submodule) in your
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CMake project.
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3. You can then use the CMake command
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[`add_subdirectory()`](https://cmake.org/cmake/help/latest/command/add_subdirectory.html)
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to include Abseil directly in your CMake project. In addition, it's possible to
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customize the name of the `cctz` target with the `-DABSL_CCTZ_TARGET=*my_cctz*` option.
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4. Add the **absl::** target you wish to use to the
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[`target_link_libraries()`](https://cmake.org/cmake/help/latest/command/target_link_libraries.html)
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section of your executable or of your library.<br>
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Here is a short CMakeLists.txt example of a project file using Abseil.
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```cmake
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cmake_minimum_required(VERSION 2.8.12)
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project(my_project)
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set(CMAKE_CXX_FLAGS "-std=c++11 -stdlib=libc++ ${CMAKE_CXX_FLAGS}")
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if(MSVC)
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# /wd4005 macro-redefinition
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# /wd4068 unknown pragma
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# /wd4244 conversion from 'type1' to 'type2'
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# /wd4267 conversion from 'size_t' to 'type2'
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# /wd4800 force value to bool 'true' or 'false' (performance warning)
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add_compile_options(/wd4005 /wd4068 /wd4244 /wd4267 /wd4800)
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add_definitions(/DNOMINMAX /DWIN32_LEAN_AND_MEAN=1 /D_CRT_SECURE_NO_WARNINGS)
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endif()
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add_subdirectory(googletest)
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add_subdirectory(cctz)
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add_subdirectory(abseil-cpp)
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add_executable(my_exe source.cpp)
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target_link_libraries(my_exe absl::base absl::synchronization absl::strings)
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```
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### Available Abseil CMake Public Targets
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Here's a non-exhaustive list of Abseil CMake public targets:
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```cmake
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absl::base
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absl::algorithm
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absl::container
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absl::debugging
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absl::memory
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absl::meta
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absl::numeric
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absl::strings
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absl::synchronization
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absl::time
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absl::utility
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```
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