Compile error(error: expected type): Passthrough_kernel

[BoruiXu]

Hi,

I ever installed the old version of the NPU driver, and recently, according to this page, I updated the Linux kernel(6.10) and XDNA Driver(2.18) without reinstallation of the Xilinx Vitis 2023.2. And when using xrt-smi examine command, it can show the NPU correctly.

However, when comping the passthrough_kernel in programing_example, it encounters the following error.

I do not know why and how to fix it. Is this because I did not reinstall Xilinx Vitis 2023.2?

Thanks a lot.

[keryell]

Curious, it looks like the backend LLVM compiler is still using typed pointer and chokes on the new LLVM IR using opaque pointer. It is equivalent on my laptop to

-<%>- /opt/xilinx/Vitis/2023.2/bin/llvm-link --version 
LLVM (http://llvm.org/):
  LLVM version 3.9.0
  Optimized build.
  Default target: x86_64-unknown-linux-gnu
  Host CPU: (unknown)

So, this is an LLVM from 2016. Xilinx tools come with a full bag of LLVM versions and for some reasons you are not picking the right one. Usually, my advice is to never source a Xilinx-provided setup script because it injects so much old stuff that it breaks any normal use later. Could you try something like

export XILINX_VITIS=/opt/xilinx/Vitis/2023.2
export XILINX_XRT=/opt/xilinx/xrt
PATH=$PATH:$XILINX_XRT/bin:$XILINX_VITIS/aietools/bin:$XILINX_VITIS/bin
# Put the system libs before XILINX breaking OpenSSL for git
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/lib/x86_64-linux-gnu:/usr/lib:$XILINX_XRT/lib:$XILINX_VITIS/lib/lnx64.o

?

[BoruiXu]

Thanks a lot, however, the compile error still exists.

I do not source the setup.sh script provided by the Xilinx and use the following environment variables.

Do you think reinstall the Xilinx Vitis 2023.2 can fix this error?

Update: Reinstall the Vitis 2023.2 solve the problem.

[keryell]

Good you solve the issue. I am curious about what was wrong with the Vitis install. Lacking AIE support? Always a pain to install again 100 GB of Vitis software...