Re: [OMPI users] Why do I need a C++ linker while linking in MPI C code with CUDA?

Hi Durga, Sorry for the late reply and thanks for reporting that issue. As Rayson mentioned, CUDA is intrinsically C++ and indeed uses the host C++ compiler. Hence linking MPI + CUDA code may need to use mpic++. It happens to work with mpicc on various platforms where the libstdc++ is

Re: [OMPI users] Why do I need a C++ linker while linking in MPI C code with CUDA?

On Mar 20, 2016, at 9:23 PM, Gilles Gouaillardet wrote: > > Durga, > > since the MPI c++ bindings are not required, you might want to > mpicc ... -lstd++ > instead of > mpicxx ... I'm not sure I'd recommend that. Using the C++ compiler may do other

Re: [OMPI users] Why do I need a C++ linker while linking in MPI C code with CUDA?

On Sun, Mar 20, 2016 at 10:37 PM, dpchoudh . wrote: > I'd tend to agree with Gilles. I have written CUDA programs in pure C > (i.e. neither involving MPI nor C++) and a pure C based tool chain builds > the code successfully. So I don't see why CUDA should be intrinsically

Re: [OMPI users] Why do I need a C++ linker while linking in MPI C code with CUDA?

Thanks Eric, that makes sense now. Durga, since the MPI c++ bindings are not required, you might want to mpicc ... -lstd++ instead of mpicxx ... Cheers, Gilles On Monday, March 21, 2016, Erik Schnetter wrote: > According to the error message, "device.o" is the file

Re: [OMPI users] Why do I need a C++ linker while linking in MPI C code with CUDA?

I'd tend to agree with Gilles. I have written CUDA programs in pure C (i.e. neither involving MPI nor C++) and a pure C based tool chain builds the code successfully. So I don't see why CUDA should be intrinsically C++. >From the Makefile (that I had attached in my previous mail) the only CUDA

Re: [OMPI users] Why do I need a C++ linker while linking in MPI C code with CUDA?

According to the error message, "device.o" is the file that causes the error. According to the source code to which you point, this file is generated from a Cuda file, not from a C file. Cuda is close to C++, and apparently nvcc makes use of C++ features. Thus you need the C++ run-time libraries.

Re: [OMPI users] Why do I need a C++ linker while linking in MPI C code with CUDA?

I am a bit puzzled... if only cuda uses the c++ std libraries, then it should depend on them (ldd libcudaxyz.so can be used to confirm that) and then linking with cuda lib should pull the c++ libs could there be a version issue ? e.g. the missing symbol is not provided by the version of the c++

Re: [OMPI users] Why do I need a C++ linker while linking in MPI C code with CUDA?

Durga, The Cuda libraries use the C++ std libraries. That's the std::ios_base errors.. You need the C++ linker to bring those in. Damien On March 20, 2016 9:15:47 AM "dpchoudh ." wrote: Hello all I downloaded some code samples from here: