Meson doesn't find CUDA compiler

[kimiz]

I am trying to build the example Nvidia DOCA apps (https://docs.nvidia.com/doca/sdk/applications-overview/index.html)
However, running meson build gives the error: Could not find suitable CUDA compiler: "nvcc".
This is quite strange as I should have everything set up correctly.
Any help/ideas would be greatly appreciated.

[dcbaker]

I'm assuming you're on Linux. is nvcc in your $PATH? what does the shell command command -v nvcc return?

[dcbaker]

That means it's not finding it. Can you post the full output of meson setup $builddir?

[kimiz]

Ah, ok. Here's the output:

:/opt/mellanox/doca/applications$ meson $/tmp/build
The Meson build system
Version: 0.61.2
Source dir: /opt/mellanox/doca/applications
Build dir: /tmp/build
Build type: native build
Program cat found: YES (/usr/bin/cat)
Project name: DOCA_APPLICATIONS
Project version: 2.2.0080
C compiler for the host machine: cc (gcc 11.4.0 "cc (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0")
C linker for the host machine: cc ld.bfd 2.38
C++ compiler for the host machine: c++ (gcc 11.4.0 "c++ (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0")
C++ linker for the host machine: c++ ld.bfd 2.38
Host machine cpu family: x86_64
Host machine cpu: x86_64
Program /usr/local/cuda-12.2/bin/nvcc found: YES (/usr/local/cuda-12.2/bin/nvcc)
meson.build:36: WARNING: Module unstable-cuda has no backwards or forwards compatibility and might not exist in future releases.
Run-time dependency CUDA (modules: cudart, cuda) found: YES 12.2 (/usr/local/cuda)
Run-time dependency threads found: YES
Found pkg-config: /usr/bin/pkg-config (0.29.2)
Run-time dependency json-c found: YES 0.15
Run-time dependency libbsd found: YES 0.11.5
Program /usr/local/cuda-12.2/bin/nvcc found: YES (/usr/local/cuda-12.2/bin/nvcc)
Dependency cuda (modules: cudart, cuda) found: YES 12.2 (cached)
Run-time dependency doca found: YES 2.2.0080
Run-time dependency libdpdk found: YES 22.11.2307.2.0
Run-time dependency doca-gpu found: YES 2.2.0080

gpu_packet_processing/src/meson.build:70:0: ERROR: No host machine compiler for "gpu_packet_processing/src/gpu_kernels/receive_tcp.cu"

[dcbaker]

That doesn't look right, you should have a compiler for cuda, either from project('doca_application', 'c', 'c++', 'cuda') or add_language('cuda'). it should give a print out similar to the one for C++ above like:

Cuda compiler for the host machine: ...
Cuda linker for the host machine: ...

[kimiz]

Hey, thanks a lot. Turns out the meson.build file that came with DOCA was improperly configured. I had tried add_language('cuda') but it didn't work. But adding 'cuda' to project() did the trick.