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Editorial Team
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Asked: 2026-06-09T23:11:25+00:00

I’m pretty new to CUDA. I use Microsoft Visual Studio 2010 where I don’t

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I’m pretty new to CUDA. I use Microsoft Visual Studio 2010 where I don’t need to worry about writing a makefile. A problem arose as I tried to call in a .cu file a device function which was declared in the .h file and defined in another .cu file. At the end of building, I received an error message:

1>ptxas : fatal error : Unresolved extern function '_Z22atomicAddEmulateDoublePdd'

This appears in both CUDA 4.2 and 5.0. I’m wondering how should I configure my MVS to avoid this error. Sorry for the nooby questions and thanks for any suggestion!

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1 Answer

  1. Editorial Team

    CUDA 4.2 and does not support static linking so device functions must be defined in the same compilation unit. A common technique is to write the device function in a .cuh file and include it in the .cu file.

    CUDA 5.0 supports a new feature called separate compilation. The CUDA 5.0 VS msbuild rules should be available in the CUDA 5.0 RC download.

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