` can be any of the download, update, or patch options that the `ExternalProject_Add()` command understands. The configure, build, install, and test steps are explicitly disabled, so options related to those steps will be ignored.
The `CMAKE_ARGS` keyword relates to the configure step and is therefore ignored. If you want variables like `GLFW_BUILD_WAYLAND` and `GLFW_BUILD_X11` set to particular values when `glfw` is added to the main project, you need to set them in the main project before the call to `FetchContent_MakeAvailable(glfw)`. Also note that even if you do that, if something else in the build has already added `glfw` to the build (by calling `FetchContent_MakeAvailable(glfw)` earlier), setting those variables will have no effect. Depending on the project, you might or might not have full control over when `FetchContent_MakeAvailable(glfw)` is called first.
---
### Author:  [@buildtool](https://discourse.cmake.org/u/buildtool)
#### Post date: [July 13, 2024, 5:37am UTC](https://discourse.cmake.org/t/fetchcontent-declare-with-cmake-args-does-not-work/11227/6 "2024-07-13T05:37:48Z")
But as of cmake 3.30, the single arg `FetchContent_Populate` has been deprecated, instead asking me to use `FetchContent_Declare`.
How am I to set cmake configure args for this? As classic workflows (that I had to scrape off the internet, and not present in the docs) does not work anymore
```auto
include(FetchContent)
FetchContent_Declare(
glfw
GIT_REPOSITORY https://github.com/glfw/glfw.git
SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/glfw-src"
GIT_TAG "master"
GIT_SHALLOW TRUE
)
FetchContent_GetProperties(glfw)
if(NOT glfw_POPULATED)
FetchContent_Populate(glfw)
set(GLFW_BUILD_WAYLAND ON CACHE INTERNAL BOOL)
set(GLFW_BUILD_X11 OFF CACHE INTERNAL BOOL)
endif()
```
---
### Author:  [@craig.scott](https://discourse.cmake.org/u/craig.scott)
#### Post date: [July 13, 2024, 5:56am UTC](https://discourse.cmake.org/t/fetchcontent-declare-with-cmake-args-does-not-work/11227/7 "2024-07-13T05:56:37Z")
CMAKE\_ARGS has never been supported for any version of FetchContent. Regardless of whether you were using `FetchContent_Populate()` or `FetchContent_MakeAvailable()`, the configure step has never been invoked by the sub-build. Whatever you were expecting CMAKE\_ARGS to do, it wasn’t having any effect and at best was being silently ignored (and continues to be).
> How am I to set cmake configure args for this?
I explained what you need to do in my previous reply. It would look something like this (with the caveats as noted in that previous reply):
```cmake
include(FetchContent)
FetchContent_Declare(
glfw
GIT_REPOSITORY https://github.com/glfw/glfw.git
SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/glfw-src"
GIT_TAG "master"
GIT_SHALLOW TRUE
)
set(GLFW_BUILD_WAYLAND ON)
set(GLFW_BUILD_X11 OFF)
FetchContent_MakeAvailable(glfw)
```
---
### Author:  [@buildtool](https://discourse.cmake.org/u/buildtool)
#### Post date: [July 13, 2024, 6:30am UTC](https://discourse.cmake.org/t/fetchcontent-declare-with-cmake-args-does-not-work/11227/8 "2024-07-13T06:30:10Z")
Great, thank you!
Can I set cmake general options such as `CMAKE_BUILD_TYPE` and `CMAKE_CXX_FLAGS` too? Would they apply only to glfw, in this example, or for the whole project?
```auto
include(FetchContent)
FetchContent_Declare(
glfw
GIT_REPOSITORY https://github.com/glfw/glfw.git
SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/glfw-src"
GIT_TAG "master"
GIT_SHALLOW TRUE
)
set(GLFW_BUILD_WAYLAND ON)
set(GLFW_BUILD_X11 OFF)
set(CMAKE_BUILD_TYPE Release)
FetchContent_MakeAvailable(glfw)
```
> caveats as noted in that previous reply
What’s the “correct” approach here then?