problem in linking cudpp to my code

[grimFandango]

Hi all,

I've followed all the steps in https://github.com/cudpp/cudpp/wiki/BuildingCUDPPwithCMake but when I run the simpleCUDPP I get these errors :

/tmp/tmpxft_0000c323_00000000-17_test1.o: In function `runTest(int, char**)':

tmpxft_0000c323_00000000-4_test1.cudafe1.cpp:(.text+0x1d9): undefined reference to `cudppCreate'

tmpxft_0000c323_00000000-4_test1.cudafe1.cpp:(.text+0x24a): undefined reference to `cudppPlan'

tmpxft_0000c323_00000000-4_test1.cudafe1.cpp:(.text+0x274): undefined reference to `cudppScan'

tmpxft_0000c323_00000000-4_test1.cudafe1.cpp:(.text+0x2d0): undefined reference to `computeSumScanGold'

tmpxft_0000c323_00000000-4_test1.cudafe1.cpp:(.text+0x322): undefined reference to `cudppDestroyPlan'

tmpxft_0000c323_00000000-4_test1.cudafe1.cpp:(.text+0x337): undefined reference to `cudppDestroy'

This is how I compile the code :

nvcc -O3 -arch=sm_35 simpleCUDPP.cu -o att1

Cheers,

[John Owens]

I think you need a -l (link library) command, something like

> nvcc -O3 -arch=sm_35 simpleCUDPP.cu -lcudpp -L/path/to/cudpp/library -o att1

JDO

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[grimFandango]

So I did that but now I get  

 /usr/bin/ld: cannot find -lcudpp

[John Owens]

And that's what the -L is for: telling the compiler where the CUDPP library is located. For me, that library is called libcudpp.a, and I would say -L/home/jowens/Documents/working/cudpp-build/lib in my compiler call.

Here's the -L flag docs for gcc:

https://gcc.gnu.org/onlinedocs/gcc/Directory-Options.html

JDO

[John Owens]

I encourage you, and others on this list, to use cmake if possible rather than rolling your own command lines; we've put a lot of effort into making CUDPP work nicely with cmake, and it is a good tool for avoiding the kinds of issues you're having. 

JDO

On Mon, Aug 10, 2015 at 7:02 PM, grimFandango <sepid....@gmail.com> wrote:

Thank you, the problem was that I used ~ instead of /home/... Now I get undefined reference to `computeSumScanGold'. Everything else seems to work fine. Sorry for all the troubles.