所需的模块应该是cmake安装的一部分.但是您必须使用以下方法将其包含在您的项目中:

The required module should be part of your cmake installation. But you have to include it into your project with:

include(${CMAKE_ROOT}/Modules/ExternalProject.cmake)

在调用externalproject_add(YOUR STUFF HERE)

说明:

CMAKE_ROOT 指向正在使用的cmake安装.所有模块都在子文件夹 Modules 中.

CMAKE_ROOT points to the cmake installation in use. All modules are within subfolder Modules.

您可以使用message(STATUS "CMAKE_ROOT=${CMAKE_ROOT}")打印当前值.或者您正在为此使用智能宏.参见 CMake

You can print out the current value with message(STATUS "CMAKE_ROOT=${CMAKE_ROOT}"). Or you are using smart macros for that. See CMake