CUDA: more than one instance of overloaded function `isnan`

Question

I am getting an error while trying to compile CUDA code with the -std=c++11 flag.

error: more than one instance of overloaded function "isnan" matches the argument list:
        function "isnan(float)"
        function "std::isnan(float)"
        argument types are: (r32)

(r32 is a typedef for float)

I found this question, in which the answer suggests to simply not specify C++11 to fix the problem, which I can not do because I am using some features of C++11 like constexpr and lambdas. Is there a way of compiling with C++11 features turned on, and still resolve this ambiguity?

I am using the following command to compile:

 nvcc -I/my/include/path/1 -I/usr/local/cuda/include src/myfile.cu -o build/myfile.o -arch=sm_61 -c --compiler-options -fPIC -Xcudafe -std=c++11

the compiler version is:

nvcc: NVIDIA (R) Cuda compiler driver
Copyright (c) 2005-2016 NVIDIA Corporation
Built on Tue_Jan_10_13:22:03_CST_2017
Cuda compilation tools, release 8.0, V8.0.61

Any help or suggestion would be greatly appreciated. Thanks!

There have been five release versions of the toolchain since CUDA 8. Have you considered testing a newer version? — talonmies, Sep 27 '18 at 13:40
I have in fact not tried. I'll install the newest version and see if it compiles. — meetaig, Sep 27 '18 at 13:51
I checked with version 10.0.130 and it seems to fix the problem. Thanks! If you make your comment an answer, I'll accept it to close the question — meetaig, Sep 28 '18 at 11:50

score 0 · Accepted Answer · answered Sep 30 '18 at 18:58

0

While this overload conflict problem was an issue with the CUDA 8 release compiler, it was fixed for the CUDA 9 release and anyone experiencing this issue should upgrade to CUDA 9 or newer.

[This answer was assembled from comments and added as a community wiki answer]

answered Sep 30 '18 at 18:58

talonmies

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I'm using CUDA 11.6 and still get this error. However replacing `isnan` with `std::isnan` as explained [here](https://stackoverflow.com/questions/33770374/why-is-isnan-ambiguous-and-how-to-avoid-it) works for me. – SimonH Jan 26 '22 at 11:22

CUDA: more than one instance of overloaded function `isnan`

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