CMAKE_PROJECT_HOMEPAGE_URL — CMake 3.12.0 Documentation

# CMAKE_PROJECT_HOMEPAGE_URL

The homepage URL of the top level project.

This variable holds the homepage URL of the project as specified in the top level CMakeLists.txt file by a `project()` command. In the event that the top level CMakeLists.txt contains multiple `project()` calls, the most recently called one from that top level CMakeLists.txt will determine the value that `CMAKE_PROJECT_HOMEPAGE_URL` contains. For example, consider the following top level CMakeLists.txt:

    cmake_minimum_required(VERSION 3.0)
    project(First HOMEPAGE_URL "http://first.example.com")
    project(Second HOMEPAGE_URL "http://second.example.com")
    add_subdirectory(sub)
    project(Third HOMEPAGE_URL "http://third.example.com")

And `sub/CMakeLists.txt` with the following contents:

    project(SubProj HOMEPAGE_URL "http://subproj.example.com")
    message("CMAKE_PROJECT_HOMEPAGE_URL = ${CMAKE_PROJECT_HOMEPAGE_URL}")

The most recently seen `project()` command from the top level CMakeLists.txt would be `project(Second ...)`, so this will print:

    CMAKE_PROJECT_HOMEPAGE_URL = http://second.example.com

To obtain the homepage URL from the most recent call to `project()` in the current directory scope or above, see the `PROJECT_HOMEPAGE_URL` variable.