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Bug 5314090: Update README.md for Sample build for auto-linux from DriveOS Docker Container

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shawnz 2025-07-21 18:58:43 +08:00
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@ -133,6 +133,58 @@ $ cd build
$ cmake -DCMAKE_CUDA_COMPILER=/usr/local/cuda/bin/nvcc -DCMAKE_LIBRARY_PATH=/usr/local/cuda/orin/lib64/ -DCMAKE_INCLUDE_PATH=/usr/local/cuda/orin/include -DBUILD_TEGRA=True ..
```
### Cross Building for Automotive Linux Platforms from the DriveOS Docker containers
To build CUDA samples to the target platform from the DriveOS Docker containers, use the following instructions.
Mount the target Root Filesystem (RFS) in the container so that the CUDA cmake process has the correct paths to CUDA and other system libraries required to build the samples.
Create a temporary directory, `<temp>` is any temporary directory of your choosing, for example, you can use `/drive/temp`:
```
$ mkdir /drive/<temp>
```
Mount the filesystem by running the following command:
```
$ mount /drive/drive-linux/filesystem/targetfs-images/dev_nsr_desktop_ubuntu-24.04_thor_rfs.img /drive/temp
```
Configure the project by running the following cmake command:
```
$ mkdir build && cd build
$ cmake .. -DBUILD_TEGRA=True \
-DCMAKE_CUDA_COMPILER=/usr/local/cuda/bin/nvcc \
-DCMAKE_TOOLCHAIN_FILE=../cmake/toolchains/toolchain-aarch64-linux.cmake \
-DTARGET_FS=/drive/temp \
-DCMAKE_LIBRARY_PATH=/drive/temp/usr/local/cuda-13.0/thor/lib64/ \
-DCMAKE_INCLUDE_PATH=/drive/temp/usr/local/cuda-13.0/thor/include/
```
Please note that the following libraries are not pre-installed in the DriveOS dev-nsr target filesystem:
* libdrm-dev
* Vulkan
This causes the cmake command to throw errors related to the missing files, and as a result, the related samples will not build in later steps. This issue will be addressed in a future DriveOS release.
To build the samples with ignore the error mentioned above, you can use `--ignore-errors`/`--keep-going` or comment out the comment out the corresponding `add_subdirectory` command in the CMakeLists.txt in the parent folder for the samples requiring Vulkan and libdrm_dev:
```
$ make -j$(nproc) --ignore-errors # or --keep-going
```
```
# In Samples/5_Domain_Specific/CMakeList.txt
# add_subdirectory(simpleGL)
# add_subdirectory(simpleVulkan)
# add_subdirectory(simpleVulkanMMAP)
# In Samples/8_Platform_Specific/Tegra/CMakeList.txt
# add_subdirectory(simpleGLES_EGLOutput)
```
### QNX
Cross-compilation for QNX with CMake is supported in the CUDA 13.0 samples release and newer. An example build for