jrhemstad
commented
1 week ago Unfortunately, this is a known limitation that resulted from the solution we used to solve an even more insidious problem. See: https://github.com/NVIDIA/cccl?tab=readme-ov-file#application-binary-interface-abi
The good news is that for most Thrust types, we have a replacement from cuda:: that does work between .cu and .cpp files. thrust::host_vector is one that we don't have an immediate replacement for, but that work is actively ongoing.
RichardSmithLab
Is this a duplicate?
Type of Bug
Compile-time Error
Component
Thrust
Describe the bug
It looks like recent changes to Thrust were made to tag the host_vector class name with the compile time CUDA architecture. This creates an issue (undefined reference) when linking shared objects compiled with nvcc or not (.cu vs .cpp files) that use Thrust objects, even host-only ones like host_vector.
Compiling everything with nvcc is probably in our case is not an option, some of the files need moc (ie Qt).
How to Reproduce
To reproduce on Ubuntu 20.04.6 LTS with Cuda 12.6: Main.cpp:
include
include <thrust/host_vector.h>
bool cudaFunc(thrust::host_vector &vec); int main() { thrust::host_vector vec; cudaFunc(vec); }
cudaFunc.cu:
include
include <thrust/host_vector.h>
bool cudaFunc(thrust::host_vector &vec)
{
return true;
}
Compile with:
/usr/local/cuda/bin/nvcc -c cudaFunc.cu g++ -I /usr/local/cuda/include -L /usr/local/cuda/targets/x86_64-linux/lib main.cpp cudaFunc.o -lcudart -ldl
will produce the error:
/usr/bin/ld: /tmp/cc5fFAJC.o: in function main: main.cpp:(.text+0x30): undefined reference to cudaFunc(thrust::THRUST_200500_CUDA_ARCHLISTNS::host_vector<int, std::allocator >&)
This will link fine on Ubuntu 20 with Cuda 12.3.
Expected behavior
No link error.
Reproduction link
No response
Operating System
No response
nvidia-smi output
No response
NVCC version
nvcc --version nvcc: NVIDIA (R) Cuda compiler driver Copyright (c) 2005-2024 NVIDIA Corporation Built on Thu_Sep_12_02:18:05_PDT_2024 Cuda compilation tools, release 12.6, V12.6.77 Build cuda_12.6.r12.6/compiler.34841621_0