问题
I was trying to compile some CUDA codes under visual studio 2010 with CUDA 4.2 (I created this CUDA project using Parallel Nsight 2.2), but I encountered an atomic problem "error : identifier "atomicAdd" is undefined", which I still can't solve after checking several forums.
So I tried to get some information from CUDA SDK Samples. First, I ran the simpleAtomicIntrinsics sample in CUDA SDK, which passed its test. Then, I copied all the files in this sample to a new CUDA 4.2 project in visual studio 2010 and compiled them, Here is the result.
1> E:\CUDA exercise Codes\CUDA_EXERCISES\CUDA_EXERCISES\CUDA_EXERCISES>"C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v4.2\bin\nvcc.exe" -gencode=arch=compute_20,code=\"sm_20,compute_20\" -gencode=arch=compute_20,code=\"sm_20,compute_20\" -gencode=arch=compute_10,code=\"sm_10,compute_10\" --use-local-env --cl-version 2010 -ccbin "c:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\bin" -I"C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v4.2\include" -G --keep-dir "Debug" -maxrregcount=0 --machine 32 --compile -g -Xcompiler "/EHsc /nologo /Od /Zi /MDd " -o "Debug\simpleAtomicIntrinsics.cu.obj" "E:\CUDA exercise Codes\CUDA_EXERCISES\CUDA_EXERCISES\CUDA_EXERCISES\simpleAtomicIntrinsics.cu"
1> simpleAtomicIntrinsics.cu
1> tmpxft_00007220_00000000-3_simpleAtomicIntrinsics.compute_20.cudafe1.gpu
1> tmpxft_00007220_00000000-7_simpleAtomicIntrinsics.compute_20.cudafe2.gpu
1> simpleAtomicIntrinsics.cu
1>e:\cuda exercise codes\cuda_exercises\cuda_exercises\cuda_exercises\simpleAtomicIntrinsics_kernel.cu(33): error : identifier "atomicAdd" is undefined
1>
1>e:\cuda exercise codes\cuda_exercises\cuda_exercises\cuda_exercises\simpleAtomicIntrinsics_kernel.cu(36): error : identifier "atomicSub" is undefined
1>
1>e:\cuda exercise codes\cuda_exercises\cuda_exercises\cuda_exercises\simpleAtomicIntrinsics_kernel.cu(39): error : identifier "atomicExch" is undefined
1>
1>e:\cuda exercise codes\cuda_exercises\cuda_exercises\cuda_exercises\simpleAtomicIntrinsics_kernel.cu(42): error : identifier "atomicMax" is undefined
1>
1>e:\cuda exercise codes\cuda_exercises\cuda_exercises\cuda_exercises\simpleAtomicIntrinsics_kernel.cu(45): error : identifier "atomicMin" is undefined
1>
1>e:\cuda exercise codes\cuda_exercises\cuda_exercises\cuda_exercises\simpleAtomicIntrinsics_kernel.cu(48): error : identifier "atomicInc" is undefined
1>
1>e:\cuda exercise codes\cuda_exercises\cuda_exercises\cuda_exercises\simpleAtomicIntrinsics_kernel.cu(51): error : identifier "atomicDec" is undefined
1>
1>e:\cuda exercise codes\cuda_exercises\cuda_exercises\cuda_exercises\simpleAtomicIntrinsics_kernel.cu(54): error : identifier "atomicCAS" is undefined
1>
1>e:\cuda exercise codes\cuda_exercises\cuda_exercises\cuda_exercises\simpleAtomicIntrinsics_kernel.cu(59): error : identifier "atomicAnd" is undefined
1>
1>e:\cuda exercise codes\cuda_exercises\cuda_exercises\cuda_exercises\simpleAtomicIntrinsics_kernel.cu(62): error : identifier "atomicOr" is undefined
1>
1>e:\cuda exercise codes\cuda_exercises\cuda_exercises\cuda_exercises\simpleAtomicIntrinsics_kernel.cu(65): error : identifier "atomicXor" is undefined
1>
1> 11 errors detected in the compilation of "C:/Users/NIEXIA~1/AppData/Local/Temp/tmpxft_00007220_00000000-9_simpleAtomicIntrinsics.compute_10.cpp1.ii".
1>C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\BuildCustomizations\CUDA 4.2.targets(361,9): error MSB3721: The command ""C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v4.2\bin\nvcc.exe" -gencode=arch=compute_20,code=\"sm_20,compute_20\" -gencode=arch=compute_20,code=\"sm_20,compute_20\" -gencode=arch=compute_10,code=\"sm_10,compute_10\" --use-local-env --cl-version 2010 -ccbin "c:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\bin" -I"C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v4.2\include" -G --keep-dir "Debug" -maxrregcount=0 --machine 32 --compile -g -Xcompiler "/EHsc /nologo /Od /Zi /MDd " -o "Debug\simpleAtomicIntrinsics.cu.obj" "E:\CUDA exercise Codes\CUDA_EXERCISES\CUDA_EXERCISES\CUDA_EXERCISES\simpleAtomicIntrinsics.cu"" exited with code 2.
1>
1>Build FAILED.
By the way, I can run other samples such as clock, matrixMul, etc. under this vs2010 CUDA Project. (This means the include path is set correctly)
I googled it and found the following link Some issue with Atomic add in CUDA kernel operation. I changed the properties of both project and the .cu file according to it, but still can't solve the problem.
Any suggestion?
回答1:
Atomics are unavailable under compute architecture 1.0, but you're still trying to compile for it according to your build log. Try removing references to compute_10 and sm_10 from your CUDA project properties and compiling for just compute architecture 2.0 (GeForce 400 series and newer).
回答2:
Try to compile with the flag -arch sm_20
回答3:
"Atomics are unavailable under compute architecture 1.0, but you're still trying to compile for it according to your build log. Try removing references to compute_10 and sm_10 from your CUDA project properties and compiling for just compute architecture 2.0 (GeForce 400 series and newer)." It's absolutely right,BTW,if you guys are compiling rodrigob_doppia's source code(boosted_learning),you can just add the line in your machine configuration: set(CUDA_NVCC_FLAGS "-arch=sm_20" CACHE STRING "nvcc flags" FORCE) Actually,it is set to switch the arch flag to sm_20,just the same as the saying above.
来源：https://stackoverflow.com/questions/11532728/error-identifier-atomicadd-is-undefined-under-visual-studio-2010-cuda-4-2