Installing projects on the system

In Chapter 1, First Steps with CMake, we indicated that CMake offers a command-line mode for installing built projects on the system:

cmake --install <dir> [<options>]

Here, <dir> is the path to the generated build tree (required). The <options> include:

• --config <cfg>: This selects the build configuration for multi-configuration generators.
• --component <comp>: This limits the installation to the given component.
• --default-directory-permissions <permissions>: This sets the default permissions for the installed directories (in <u=rwx,g=rx,o=rx> format).
• --install-prefix <prefix>: This specifies the non-default installation path (stored in the CMAKE_INSTALL_PREFIX variable). It defaults to /usr/local on Unix-like systems and to c:/Program Files/${PROJECT_NAME} on Windows. Before CMake 3.21, you’ll have to use a less-explicit option: --prefix <prefix...