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diff --git a/third_party/glog/cmake/INSTALL.md b/third_party/glog/cmake/INSTALL.md new file mode 100644 index 000000000000..1377d652ed09 --- /dev/null +++ b/third_party/glog/cmake/INSTALL.md @@ -0,0 +1,81 @@ +# Glog - CMake Support + +Glog comes with a CMake build script ([CMakeLists.txt](../CMakeLists.txt)) that can be used on a wide range of platforms. +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. +You can either build Glog with CMake as a standalone project or it can be incorporated into an existing CMake build for another project. + +## Table of Contents + +- [Building Glog with CMake](#building-glog-with-cmake) +- [Consuming Glog in a CMake Project](#consuming-glog-in-a-cmake-project) +- [Incorporating Glog into a CMake Project](#incorporating-glog-into-a-cmake-project) + +## Building Glog with CMake + +When building Glog as a standalone project, on Unix-like systems with GNU Make as build tool, the typical workflow is: + +1. Get the source code and change to it. +e.g. cloning with git: +```bash +git clone git@github.com:google/glog.git +cd glog +``` + +2. Run CMake to configure the build tree. +```bash +cmake -H. -Bbuild -G "Unix Makefiles" +``` +note: To get the list of available generators (e.g. Visual Studio), use `-G ""` + +3. Afterwards, generated files can be used to compile the project. +```bash +cmake --build build +``` + +4. Test the build software (optional). +```bash +cmake --build build --target test +``` + +5. Install the built files (optional). +```bash +cmake --build build --target install +``` + +## Consuming Glog in a CMake Project + +If you have Glog installed in your system, you can use the CMake command +`find_package()` to include it in your CMake Project. + +```cmake +cmake_minimum_required(VERSION 3.0.2) +project(myproj VERSION 1.0) + +find_package(glog 0.4.0 REQUIRED) + +add_executable(myapp main.cpp) +target_link_libraries(myapp glog::glog) +``` + +Compile definitions and options will be added automatically to your target as +needed. + +## Incorporating Glog into a CMake Project + +You can also use the CMake command `add_subdirectory()` to include Glog directly from a subdirectory of your project. +The **glog::glog** target is in this case an ALIAS library target for the **glog** library target. + +```cmake +cmake_minimum_required(VERSION 3.0.2) +project(myproj VERSION 1.0) + +add_subdirectory(glog) + +add_executable(myapp main.cpp) +target_link_libraries(myapp glog::glog) +``` + +Again, compile definitions and options will be added automatically to your target as +needed. |