使用CUDA驱动程序API VS2012时无法解析的外部符号

Question

I've been trying to use the CUDA driver API to load a .ptx file and a function from it with this code:

CUdevice device;
cuDeviceGet(&device,0);
CUcontext ctx;
cuCtxCreate(&ctx,0,device);
CUmodule mod;
cuModuleLoad(&mod,"kernel.ptx");
CUfunction func;
cuModuleGetFunction(&func,mod,"kernel");
CUdeviceptr ints;
cuMemAlloc(&ints,(sizeof(int)*30));

However at compile time I get these errors:

    1>kernel.cu.obj : error LNK2019: unresolved external symbol _cuDeviceGet@8 referenced in function _main
    1>kernel.cu.obj : error LNK2019: unresolved external symbol _cuCtxCreate_v2@12 referenced in function _main
    1>kernel.cu.obj : error LNK2019: unresolved external symbol _cuModuleLoad@8 referenced in function _main
    1>kernel.cu.obj : error LNK2019: unresolved external symbol _cuModuleGetFunction@12 referenced in function _main
    1>kernel.cu.obj : error LNK2019: unresolved external symbol _cuMemAlloc_v2@8 referenced in function _main
    1>kernel.cu.obj : error LNK2019: unresolved external symbol _cuMemcpyHtoD_v2@12 referenced in function _main
    1>kernel.cu.obj : error LNK2019: unresolved external symbol _cuMemcpyDtoH_v2@12 referenced in function _main
    1>kernel.cu.obj : error LNK2019: unresolved external symbol _cuLaunchKernel@44 referenced in function _main

I created a new CUDA 5.5 project in VS2012 and typed this directly into the generated .cu file however at compile time I got these errors. If I do a test that doesn't use the driver api I don't get any errors!

Answer 1

当您不针对cuda.lib链接时，会发生这些错误。

Answer 2

For those who does not know how to add cuda.lib into linking process like me (using VS2017):

1. Right click on the project, goto Properties at the bottom of the menu

2. Goto Linker-->Input

3. In Additional Dependencies , make sure that cuda.lib is there. In my case, this solved the 2019 link error.

4. Besides, if you click on the edit item in the drop menu, there is a Macros button that you can click and view all pre-defined Macros in your VS project.