mex: link of ' "mexGPUExample.mexa64"' failed

>> setenv('MW_NVCC_PATH','/usr/local/cuda-5.5/bin/nvcc') >> mex mexGPUExample.cu /usr/lib/x86_64-linux-gnu/libc_nonshared.a(atexit.oS): In function `atexit': (.text+0x12): undefined reference to `__cxa_atexit' collect2: error: ld returned 1 exit status

    mex: link of ' "mexGPUExample.mexa64"' failed.

Unable to complete successfully.

>> >>

how to solve it?

Answer 1

[Þ™]

I got it,I update my g++-4.4,so it worked.

Answer 2

[Joao]

I also have this problem in a linux mint 17 Matlab R2014a cuda5.5 setup. Changing the gcc/g++ version from 4.8 to 4.7.3 did not fix the mex error.

my Matlab output is

///

>> mex -largeArrayDims mexGPUExample.cu

Building with 'nvcc'.

Error using mex

/usr/lib/x86_64-linux-gnu/libc_nonshared.a(atexit.oS): In function `atexit':

(.text+0x12): undefined reference to `__cxa_atexit'

collect2: error: ld returned 1 exit status

///

In matlab, mexing .c and .cpp files works, and in the command line nvcc .cu files works as well.

Any ideas?

Answer 3

[Jan Barowski]

I got the same error using Matlab 2015 Prerelease on Ubuntu 14.04 with CUDA 6.5 and g++4.8. Thanks to Matlab support we figured out, that manually linking does the trick. Here is my compile script for the matlab mex/gpu example:

myArch = computer('arch'); pathToOpts = fullfile(matlabroot, ... 'toolbox', 'distcomp', 'gpu', ... 'extern', 'src', 'mex', myArch,'gcc',... ['mex_CUDA_' myArch '.xml']); copyfile(pathToOpts,'.','f')

mex -v -largeArrayDims mexGPUExample.cu -lstdc++ -lc

Hope this helps!