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authorGravatar Abseil Team <absl-team@google.com>2018-02-16 01:13:15 -0800
committerGravatar Mark Barolak <mbar@google.com>2018-02-16 10:50:05 -0500
commite2d17845973714cda3e828c16131f245dd82b2b6 (patch)
tree0636df21c6f8aed316f8d1b49ea699f6484cb09a /CMake
parent055cc7dce10aa6bd7cc2ef64e0fe453fb792da62 (diff)
Changes imported from Abseil "staging" branch:
- 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
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diff --git a/CMake/README.md b/CMake/README.md
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+++ b/CMake/README.md
@@ -1,80 +1,82 @@
-## Abseil CMake build instructions
-
-
-### Recommended usage : incorporate Abseil into an CMake project
-
- For API / ABI compatibility reasons, it is recommended to build
- and use abseil in a subdirectory of your project or as an embedded
- dependency
-
- This is similar to the recommended usage of the googletest framework
- ( https://github.com/google/googletest/blob/master/googletest/README.md )
-
- Build and use step-by-step
-
-
- 1- Download abseil and copy it in a sub-directory in your project.
- or add abseil as a git-submodule in your project
-
- 2- If not done yet, download and copy in your project the two dependencies of
- abseil `cctz` and `googletest`
-
- * cctz https://github.com/google/cctz
- * googletest https://github.com/google/googletest
-
- 3- You can then use the cmake command `add_subdirectory()` to include
- abseil directly and use the abseil targets in your project.
-
- Note: Abseil requires CCTZ and the googletest framework. Consequently,
- the targets `gtest`, `gtest_main`, `gmock` and `cctz` need
- to be declared in your project before including abseil with
- `add_subdirectory`. However, if abseil is compiled with
- `-DBUILD_TESTING=OFF`, then `gtest`, `gmock` and `gtest_main` are not
- required. In addition, it's possible to override the name of the `cctz`
- target to a custom one with option `-DABSL_CCTZ_TARGET=*my_cctz*`.
-
- 4- Add the absl:: target you wish to use to the `target_link_libraries()`
- section of your executable or of your library
-
-
- Here is a short CMakeLists.txt example of a possible project file
- using abseil
-
- cmake_minimum_required(VERSION 2.8.12)
- project(my_project)
-
- set(CMAKE_CXX_FLAGS "-std=c++11 -stdlib=libc++ ${CMAKE_CXX_FLAGS}")
-
- if (MSVC)
- # /wd4005 macro-redefinition
- # /wd4068 unknown pragma
- # /wd4244 conversion from 'type1' to 'type2'
- # /wd4267 conversion from 'size_t' to 'type2'
- # /wd4800 force value to bool 'true' or 'false' (performance warning)
- add_compile_options(/wd4005 /wd4068 /wd4244 /wd4267 /wd4800)
- add_definitions(/DNOMINMAX /DWIN32_LEAN_AND_MEAN=1 /D_CRT_SECURE_NO_WARNINGS)
- endif()
-
- add_subdirectory(googletest)
- add_subdirectory(cctz)
- add_subdirectory(abseil-cpp)
-
- add_executable(my_exe source.cpp)
- target_link_libraries(my_exe absl::base absl::synchronization absl::strings)
-
-
-As of this writing, that pull request requires -DBUILD_TESTING=OFF as it doesn't correctly export cctz's dependency on Google Benchmark.
-
- You will find here a non exhaustive list of absl public targets
-
- absl::base
- absl::algorithm
- absl::container
- absl::debugging
- absl::memory
- absl::meta
- absl::numeric
- absl::strings
- absl::synchronization
- absl::time
- absl::utility
+# Abseil CMake Build Instructions
+
+Abseil comes with a CMake build script ([CMakeLists.txt](../CMakeLists.txt))
+that can be used on a wide range of platforms ("C" stands for cross-platform.).
+If you don't have CMake installed already, you can download it for free from
+<http://www.cmake.org/>.
+
+CMake works by generating native makefiles or build projects that can
+be used in the compiler environment of your choice.
+
+For API/ABI compatibility reasons, we strongly recommend building Abseil in a
+subdirectory of your project or as an embedded dependency.
+
+## Incorporating Abseil Into a CMake Project
+
+The recommendations below are similar to those for using CMake within the
+googletest framework
+(<https://github.com/google/googletest/blob/master/googletest/README.md#incorporating-into-an-existing-cmake-project>)
+
+### Step-by-Step Instructions
+
+1. If you haven't done so already, integrate the Abseil dependency
+[CCTZ](https://github.com/google/cctz) into your CMake project. Consequently, the
+target 'cctz' needs to be declared in your CMake project **before** including Abseil.<br>
+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
+`-DBUILD_TESTING=OFF` when configuring your project with CMake.
+
+2. Download Abseil and copy it into a subdirectory in your CMake project or add
+Abseil as a [git submodule](https://git-scm.com/docs/git-submodule) in your
+CMake project.
+
+3. You can then use the CMake command
+[`add_subdirectory()`](https://cmake.org/cmake/help/latest/command/add_subdirectory.html)
+to include Abseil directly in your CMake project. In addition, it's possible to
+customize the name of the `cctz` target with the `-DABSL_CCTZ_TARGET=*my_cctz*` option.
+
+4. Add the **absl::** target you wish to use to the
+[`target_link_libraries()`](https://cmake.org/cmake/help/latest/command/target_link_libraries.html)
+section of your executable or of your library.<br>
+Here is a short CMakeLists.txt example of a project file using Abseil.
+
+```cmake
+cmake_minimum_required(VERSION 2.8.12)
+project(my_project)
+
+set(CMAKE_CXX_FLAGS "-std=c++11 -stdlib=libc++ ${CMAKE_CXX_FLAGS}")
+
+if(MSVC)
+ # /wd4005 macro-redefinition
+ # /wd4068 unknown pragma
+ # /wd4244 conversion from 'type1' to 'type2'
+ # /wd4267 conversion from 'size_t' to 'type2'
+ # /wd4800 force value to bool 'true' or 'false' (performance warning)
+ add_compile_options(/wd4005 /wd4068 /wd4244 /wd4267 /wd4800)
+ add_definitions(/DNOMINMAX /DWIN32_LEAN_AND_MEAN=1 /D_CRT_SECURE_NO_WARNINGS)
+endif()
+
+add_subdirectory(googletest)
+add_subdirectory(cctz)
+add_subdirectory(abseil-cpp)
+
+add_executable(my_exe source.cpp)
+target_link_libraries(my_exe absl::base absl::synchronization absl::strings)
+```
+
+### Available Abseil CMake Public Targets
+
+Here's a non-exhaustive list of Abseil CMake public targets:
+
+```cmake
+absl::base
+absl::algorithm
+absl::container
+absl::debugging
+absl::memory
+absl::meta
+absl::numeric
+absl::strings
+absl::synchronization
+absl::time
+absl::utility
+```