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README: Remove deprecated method to build open-amp lib for zephyr #431

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README: Remove deprecated method to build open-amp lib for zephyr #431

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22 changes: 4 additions & 18 deletions README.md
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Expand Up @@ -104,24 +104,10 @@ The [Zephyr open-amp repo](https:/zephyrproject-rtos/open-amp)
implements the open-amp library for the Zephyr project. It is mainly a fork of
this repository, with some add-ons for integration in the Zephyr project.
The standard way to compile OpenAMP for a Zephyr project is to use Zephyr build
environment. Please refer to [Zephyr OpenAMP samples](https:/zephyrproject-rtos/zephyr/tree/main/samples/subsys/ipc) for examples.

Nevertheless you can compile the OpenAMP project for Zephyr.
As OpenAMP uses libmetal, please refer to libmetal README to build libmetal
for Zephyr before building OpenAMP library for Zephyr.
As Zephyr uses CMake, we build OpenAMP library as a target of Zephyr CMake
project. Here is how to build libmetal for Zephyr:
```
$ export ZEPHRY_GCC_VARIANT=zephyr
$ export ZEPHRY_SDK_INSTALL_DIR=<where Zephyr SDK is installed>
$ source <git_clone_zephyr_project_source_root>/zephyr-env.sh

$ cmake <OpenAMP_source_root> \
-DWITH_ZEPHYR=on -DBOARD=qemu_cortex_m3 \
-DCMAKE_INCLUDE_PATH="<libmetal_zephyr_build_dir>/lib/include" \
-DCMAKE_LIBRARY_PATH="<libmetal_zephyr_build_dir>/lib" \
$ make VERBOSE=1 all
```
environment. Please refer to
[Zephyr OpenAMP samples](https:/zephyrproject-rtos/zephyr/tree/main/samples/subsys/ipc)
for examples and [Zephyr documentation](https://docs.zephyrproject.org/latest/) for the build
process.

### Example to compile OpenAMP for communication between Linux processes:
* Install libsysfs devel and libhugetlbfs devel packages on your Linux host.
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