Problem
SCALE's AMD target does not declare cudaSurfaceObject_t. Any translation unit that names the type fails to compile. NVIDIA's nvcc accepts it, and SCALE targeting NVIDIA accepts it; only SCALE targeting AMD rejects it. The AMD headers declare the sibling type cudaTextureObject_t (in texture_types.h) but not cudaSurfaceObject_t.
Reproducer
#include <cuda_runtime.h>
void host(cudaSurfaceObject_t s) { cudaSurfaceObject_t t = s; (void)t; }
nvcc -arch=sm_75 -std=c++17 -c repro.cu compiles.- SCALE to NVIDIA,
llvm/bin/nvcc -arch=sm_75 -std=c++17 -c repro.cu, compiles.
- SCALE to AMD,
targets/gfx1100/bin/nvcc -std=c++17 -c repro.cu, fails:
repro.cu:2:11: error: unknown type name 'cudaSurfaceObject_t'; did you mean 'cudaTextureObject_t'?
note: 'cudaTextureObject_t' declared here (redscale_impl/.../texture_types.h:6)
Likely cause
The AMD target ships texture_types.h, which declares cudaTextureObject_t, but has no declaration of cudaSurfaceObject_t. On NVIDIA that type lives in surface_types.h. The AMD headers appear to be missing that declaration.
Toolchain: SCALE unstable-2026.07.08 (clang 20.1.8), AMD target gfx1100.
Problem
SCALE's AMD target does not declare
cudaSurfaceObject_t. Any translation unit that names the type fails to compile. NVIDIA's nvcc accepts it, and SCALE targeting NVIDIA accepts it; only SCALE targeting AMD rejects it. The AMD headers declare the sibling typecudaTextureObject_t(intexture_types.h) but notcudaSurfaceObject_t.Reproducer
nvcc -arch=sm_75 -std=c++17 -c repro.cucompiles.llvm/bin/nvcc -arch=sm_75 -std=c++17 -c repro.cu, compiles.targets/gfx1100/bin/nvcc -std=c++17 -c repro.cu, fails:Likely cause
The AMD target ships
texture_types.h, which declarescudaTextureObject_t, but has no declaration ofcudaSurfaceObject_t. On NVIDIA that type lives insurface_types.h. The AMD headers appear to be missing that declaration.Toolchain: SCALE unstable-2026.07.08 (clang 20.1.8), AMD target gfx1100.