Linux C ++项目目录布局 - CMake

I would like to use some standard layout for my linux c++ project which is built using cmake and contains some executables and a library that these execs might link to. Currently I just had a folder for the project and a sub folder for each sub project. With a CMakeLists in the top level and one in each sub level that the opt level adds.I would like to use some standard layout for my