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Expand Level Zero BUILD.md

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Change-Id: I92fc88f4407914e6b88c83b1ebdc83d8e5cc3c45
Signed-off-by: Jaime Arteaga <jaime.a.arteaga.molina@intel.com>
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Jaime Arteaga
2020-03-06 10:02:29 -08:00
committed by sys_ocldev
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# Building Level Zero
These instructions have been tested on Ubuntu* and complement those existing for NEO.
These instructions have been tested on Ubuntu* and complement those existing for NEO in the top-level BUILD.md file.
1. Install Level Zero loader
1. Install Level Zero loader and Level Zero headers
Build and install Level Zero loader, as indicated in [https://github.com/oneapi-src/level-zero](https://github.com/oneapi-src/level-zero).
Both packages generated from Level Zero loader are needed.
Build Level Zero loader, as indicated in [https://github.com/oneapi-src/level-zero](https://github.com/oneapi-src/level-zero).
2. Build Level Zero driver with NEO
Build will generate ze_loader library and symlinks, as well as those for ze_validation_layer.
This generates `libze_intel_gpu.so`.
Optionally, two packages can be built: binary and devel.
3. Compile your application
2. Build Level Zero driver
Compilation needs to include the Level Zero headers from the Level Zero loader and to link against the loader library.
Follow instructions in top-level BUILD.md file to build NEO. Level Zero is built by default.
When built, ze_intel_gpu library and symlinks are generated.
Optionally, you may install Level Zero loader and driver packages.
3. Build your application
Compilation needs to include the Level Zero headers and to link against the loader library:
```shell
g++ ~/zello_world.cpp -o zello_world -lze_loader
g++ zello_world.cpp -o zello_world -lze_loader
```
If libraries not installed in system paths, include Level Zero headers and path to Level Zero loader:
```shell
g++ -I<path_to_Level_Zero_headers> zello_world.cpp -o zello_world -L<path_to_libze_loader.so> -lze_loader
```
4. Execute your application
Set your paths to find the ze_loader and the ze_intel_gpu libraries if not present in standard paths.
If Level Zero loader packages have been built and installed in the system, then they will be present in system paths:
```shell
./zello_world
```
___(*) Other names and brands may be claimed as property of others.___
If libraries not installed in system paths, add paths to ze_loader and ze_intel_gpu libraries:
```shell
LD_LIBRARY_PATH=<path_to_libze_loader.so>:<path_to_libze_intel_gpu.so> ./zello_world
```
___(*) Other names and brands may be claimed as property of others.___