# Best practice for c++20 modules?
**URL:** https://discourse.cmake.org/t/best-practice-for-c-20-modules/8800
**Category:** Usage
**Created:** [August 22, 2023, 1:57pm UTC](https://discourse.cmake.org/t/best-practice-for-c-20-modules/8800 "2023-08-22T13:57:22Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@Glad](https://discourse.cmake.org/u/Glad)
#### Post date: [August 22, 2023, 1:57pm UTC](https://discourse.cmake.org/t/best-practice-for-c-20-modules/8800/1 "2023-08-22T13:57:23Z")
Hi,
Using CMake 3.27+ and clang 16/17+ (or gcc 13.2+), what would be the best way to have a project B import a module generated in a project A, out of tree ?
I am on Linux.
Many examples out there are not out-of-tree.
–Global dev dir
-----Project A
—build
—src
—includes
—CMakeLists.txt
-----Project B
—build
—src
—includes
—CMakeLists.txt
-----Project C
—build
—src
—includes
—CMakeLists.txt
Projects are independent but Project A is a module, project B and C ae executables.
Right now, Project A is a static library imported in B and C. Works perfectly fine as is.
But I am willing to test.
More globally, having a best practice thread, evolving with the implementations, would be phenomenal.
Thanks
---
### Author:  [@ben.boeckel](https://discourse.cmake.org/u/ben.boeckel)
#### Post date: [August 22, 2023, 2:09pm UTC](https://discourse.cmake.org/t/best-practice-for-c-20-modules/8800/2 "2023-08-22T14:09:33Z")
Experimental support for `IMPORTED` targets with modules [just landed yesterday](https://gitlab.kitware.com/cmake/cmake/-/merge_requests/8535) if you want to test out `master`. Note that there aren’t “best practices” yet, but testing that things work as intended with “real” code would be appreciated.
---
### Author:  [@Glad](https://discourse.cmake.org/u/Glad)
#### Post date: [August 22, 2023, 2:39pm UTC](https://discourse.cmake.org/t/best-practice-for-c-20-modules/8800/3 "2023-08-22T14:39:39Z")
I have a lot of interest for it so I will do.
I have a medium multi libs project that is waiting for it. 🙂