cannot find -lmwgpu!

While compiling a mex file with GPU support, I am getting the following error

Error using mex
/usr/bin/ld: cannot find -lmwgpu
collect2: error: ld returned 1 exit status

Any idea how to resolve this issue.

[Joss Knight]

More information needed. What version of MATLAB do you have, and what are you entering at the command line to get this error.

[Michael Teresi]

I also have this error.

MATLAB 2016b

Ubuntu 14.04 (4.4.0)

Full call:

    user@host:~/caffe$ make matcaffe
    MEX matlab/+caffe/private/caffe_.cpp
    Building with 'g++'.
    /usr/bin/ld: cannot find -lmwgpu
    collect2: error: ld returned 1 exit status

    make: *** [matlab/+caffe/private/caffe_.mexa64] Error 255

This occurs when adding an include and a link for Matlab (abbreviated):

    MATLAB_INCLUDE := -I$(MATLAB_DIR)/toolbox/distcomp/gpu/extern/include
    MATLAB_LIBS := -lmwgpu

More specifically change the Makefile: Caffe Master Makefile line 519

    CXXFLAGS="\$$CXXFLAGS $(MATLAB_CXXFLAGS) -I$(MATLAB_DIR)/toolbox/distcomp/gpu/extern/include"\
    CXXLIBS="\$$CXXLIBS $(STATIC_LINK_COMMAND) $(LDFLAGS) -lmwgpu" -output $@

(I inherited this Makefile from another colleague)

(related post (?) Closed issue: caffe_.mexw64: Invalid MEX-file #7

[ziteng Liu]

Hi, have you solved this problem? I have the same error when I use mexcuda function as follow:

mexcuda mexGPUExample.cu

Then I get

Building with 'nvcc'.
nvcc warning : The 'compute_20', 'sm_20', and 'sm_21' architectures are deprecated, and may be removed in a future release (Use -Wno-deprecated-gpu-targets to suppress warning).
nvcc warning : The 'compute_20', 'sm_20', and 'sm_21' architectures are deprecated, and may be removed in a future release (Use -Wno-deprecated-gpu-targets to suppress warning).

Error using mex
/usr/bin/ld: cannot find -lmwgpu
collect2: error: ld returned 1 exit status
Error in mexcuda (line 157)
    [varargout{1:nargout}] = mex(mexArguments{:});