Windows build vecadd sample fail: linking with `link.exe` failed: exit code: 1120

[CharryWu]

Build on my windows machine failed on vecadd sample using CUDA v13.2. Other samples matmul gemm sha2_crates_io don't have build failures.

I've completed necessary steps of

• Installing LLVM 7.0.1
• adding nvvm64 path to system PATH variable
• setting up include, dll, lib CUDA dir
• setting up system environment variables CUDNN_INCLUDE_DIR
  • see my comment.

I've also tried taking out crates/cudnn and crates/cudnn-sys from Cargo.toml, however that yields the same failure msg:

warning: vecadd@0.1.0: Building rustc_codegen_nvvm to satisfy cuda_builder requirements
error: linking with `link.exe` failed: exit code: 1120
  |
  = note: "C:\\Program Files\\Microsoft Visual Studio\\2022\\Community\\VC\\Tools\\MSVC\\14.44.35207\\bin\\HostX64\\x64\\link.exe" "/NOLOGO" "C:\\Users\\wuzcc\\AppData\\Local\\Temp\\rustcAggPCL\\symbols.o" "<43 object files omitted>" "C:\\Users\\wuzcc\\repos\\rust-cuda\\target\\debug\\deps/{libnanorand-9f6e19a68fc9bbd8,libcust-52f8a6d6e3076750,libbitflags-51ce0b49603a3905,libcust_core-71568aa6690e393f,libnum_complex-a7eefcb649649515,libglam-19391019730a1d01,liblibm-444b5f94078aa3ba,libmint-818e8402e3e851d1,libvek-306fb5567b251c0b,libapprox-d6b14a695a88116e,libnum_integer-94b95c575c64d9f3,libnum_traits-2550727de1635f7c,libbytemuck-c4d6ba9783c81500,libcust_raw-f8ef2e101cb21c64}.rlib" "<sysroot>\\lib\\rustlib\\x86_64-pc-windows-msvc\\lib/{libstd-*,libpanic_unwind-*,libwindows_targets-*,librustc_demangle-*,libstd_detect-*,libhashbrown-*,librustc_std_workspace_alloc-*,libunwind-*,libcfg_if-*,librustc_std_workspace_core-*,liballoc-*,libcore-*,libcompiler_builtins-*}.rlib" "C:\\Program Files\\NVIDIA GPU Computing Toolkit\\CUDA\\v13.0\\lib\\x64\\cuda.lib" "C:\\Program Files\\NVIDIA GPU Computing Toolkit\\CUDA\\v13.0\\lib\\x64\\cublas.lib" "C:\\Program Files\\NVIDIA GPU Computing Toolkit\\CUDA\\v13.0\\nvvm\\lib\\x64\\nvvm.lib" "kernel32.lib" "kernel32.lib" "kernel32.lib" "ntdll.lib" "userenv.lib" "ws2_32.lib" "dbghelp.lib" "/defaultlib:msvcrt" "/NXCOMPAT" "/LIBPATH:C:\\Program Files\\NVIDIA GPU Computing Toolkit\\CUDA\\v13.0\\lib\\x64" "/LIBPATH:C:\\Program Files\\NVIDIA GPU Computing Toolkit\\CUDA\\v13.0\\nvvm\\bin" "/LIBPATH:C:\\Program Files\\NVIDIA GPU Computing Toolkit\\CUDA\\v13.0\\nvvm\\lib\\x64" "/OUT:C:\\Users\\wuzcc\\repos\\rust-cuda\\target\\debug\\deps\\vecadd.exe" "/OPT:REF,NOICF" "/DEBUG" "/PDBALTPATH:%_PDB%" "/NATVIS:<sysroot>\\lib\\rustlib\\etc\\intrinsic.natvis" "/NATVIS:<sysroot>\\lib\\rustlib\\etc\\liballoc.natvis" "/NATVIS:<sysroot>\\lib\\rustlib\\etc\\libcore.natvis" "/NATVIS:<sysroot>\\lib\\rustlib\\etc\\libstd.natvis"
  = note: some arguments are omitted. use `--verbose` to show all linker arguments
  = note: LINK : warning LNK4098: defaultlib 'LIBCMT' conflicts with use of other libs; use /NODEFAULTLIB:library␍
          libnanorand-9f6e19a68fc9bbd8.rlib(nanorand-9f6e19a68fc9bbd8.nanorand.96a93bfb8161137c-cgu.0.rcgu.o) : error LNK2019: unresolved external symbol SystemFunction036 referenced in function _ZN8nanorand7entropy7windows7entropy17h2165301ee84d00f2E␍
          C:\Users\wuzcc\repos\rust-cuda\target\debug\deps\vecadd.exe : fatal error LNK1120: 1 unresolved externals␍


warning: vecadd@0.1.0: Building rustc_codegen_nvvm to satisfy cuda_builder requirements
error: could not compile `vecadd` (bin "vecadd") due to 1 previous error

rustc 1.91.0-nightly (f34ba774c 2025-08-03)
CUDA Kit Version: v13.2
Microsoft Visual Studio 2022 Version 17.14.20
OS version: Windows 11 25H2
GPU Device: RTX 3060 12GB
Clang version 7.0.1
Nvidia GeForce Driver: 595.79