# Hello...I have been using cmake for sometime but now I am building more/ELDK
**URL:** https://discourse.cmake.org/t/hello-i-have-been-using-cmake-for-sometime-but-now-i-am-building-more-eldk/14088
**Category:** Usage
**Tags:** os:linux
**Created:** [May 13, 2025, 11:27pm UTC](https://discourse.cmake.org/t/hello-i-have-been-using-cmake-for-sometime-but-now-i-am-building-more-eldk/14088 "2025-05-13T23:27:50Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@For\_Ward](https://discourse.cmake.org/u/For_Ward)
#### Post date: [May 13, 2025, 11:27pm UTC](https://discourse.cmake.org/t/hello-i-have-been-using-cmake-for-sometime-but-now-i-am-building-more-eldk/14088/1 "2025-05-13T23:27:50Z")
Hello,
I am using cmake but ELDK is not available it seems. I am trying to cross compile via cmake from WSL2 Debian Bookworm to an armhf machine. It is a single core machine that needs the build.
So far, this is what I have going…
```auto
cmake_minimum_required(VERSION 3.25)
project(BeagleCPP)
# find_package(PTHREADS REQUIRED)
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_SYSTEM_NAME Linux)
set(CMAKE_C_COMPILER /usr/bin/arm-linux-gnueabihf-gcc)
set(CMAKE_CXX_COMPILER /usr/bin/arm-linux-gnueabihf-g++)
set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
set(CMAKE_FIND_ROOT_PATH ~/BeagleCPP/)
include_directories(include)
file(GLOB SOURCES "src/*.cpp")
add_executable(BeagleCPP ${SOURCES})
```
But here, [https://cmake.org/cmake/help/book/mastering-cmake/chapter/Cross%20Compiling%20With%20CMake.html](https://cmake.org/cmake/help/book/mastering-cmake/chapter/Cross%20Compiling%20With%20CMake.html) , is where I find that ELDK is needed to port to armhf architecture type machines.
32-bit and older but I wanted to test on this machine via cross\_compilation before proceeding to arm64/aarch64.
I am not quite sure I understand the basis for having ELDK in the docs. when it is not available…
Or…I am missing the boat. Either way, I have tried with a cross-compiler listed from a Debian repo to no avail.
Seth
P.S. Please send some guidance or ideas.
---
### Author:  [@hsattler](https://discourse.cmake.org/u/hsattler)
#### Post date: [May 14, 2025, 8:20am UTC](https://discourse.cmake.org/t/hello-i-have-been-using-cmake-for-sometime-but-now-i-am-building-more-eldk/14088/2 "2025-05-14T08:20:21Z")
That’s the bad thing about examples: some people take them literally.
But read all words of the sentence:
" **Assuming** your target environment is installed under `/opt/eldk/ppc_74xx` […]"
You obviously use another target environment.
---
### Author:  [@For\_Ward](https://discourse.cmake.org/u/For_Ward)
#### Post date: [May 15, 2025, 1:48am UTC](https://discourse.cmake.org/t/hello-i-have-been-using-cmake-for-sometime-but-now-i-am-building-more-eldk/14088/3 "2025-05-15T01:48:01Z")
`build CMakeLists.txt include src` are the files in my repo I am using…
- `build`: of course is the build dir.
- `CMakeLists.txt`: is of course my build file.
- `include`: are all my .h files.
- `src`: is all the .cpp files I will be cross\_compiling.
I understand about the example now. Since the inception of the build with `cmake`, I have learned some new ideas and build rules.
```auto
include_directories(include)
file(GLOB SOURCES "src/*.cpp")
add_executable(BeagleCPP ${SOURCES})
```
At least, does this work with the files in `src` and `include` for now?
It would build to 100% and then error out at the last second of the build compilation.
Also, would I need to grab a copy of debian (armhf) and then `mount` the extracted .iso file to `/tmp/` or '/mnt/` and go from that point forward. I am seemingly having a difficult time now trying to summarize so far.
The build is still a WIP and it would be easier on me if I just use the armhf machine but that is not the way I should do it. I say that because cross\_compiling is faster and once I can `rinse and repeat`, it would be an easy task.
Now, with all that typed out, I took out:
```auto
set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
```
I also added the cross\_compiler:
```auto
set(CMAKE_CROSS_COMPILER /usr/bin/arm-linux-gnueabihf-)
```
Seth
---
### Author:  [@For\_Ward](https://discourse.cmake.org/u/For_Ward)
#### Post date: [May 17, 2025, 9:14am UTC](https://discourse.cmake.org/t/hello-i-have-been-using-cmake-for-sometime-but-now-i-am-building-more-eldk/14088/4 "2025-05-17T09:14:17Z")
I think my query is with the cross\_compiler now and not cmake. Thank you for the time on this site so far.