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# 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.
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