matlab can't find nvcc problem

[Pei Liu]

Hello all, the problem can be described as:

---------------------------------------------

Attention: Setting the 'MW_NVCC_PATH' environment
variable to '/usr/local/cuda-10.1/bin/nvcc'
> In vl_compilenn>activate_nvcc (line 752)
  In vl_compilenn (line 296)
attention: NVCC not found in the command line path or the
one found does not matches
'/usr/local/cuda-10.1/bin/nvcc'.
> In vl_compilenn>activate_nvcc (line 761)
  In vl_compilenn (line 296)
Location of NVCC (/usr/local/cuda-10.1/bin) added to your command search PATH.
nvcc fatal   : '-DNDEBUG': expected a number
Error to use vl_compilenn>nvcc_compile (line 615)
Command "/usr/local/cuda-10.1/bin/nvcc" -c -o
"/home/u/volpi/matconvnet-1.0-beta25/matlab/mex/.build/bits/data.o"
"/home/u/volpi/matconvnet-1.0-beta25/matlab/src/bits/data.cu"
-DENABLE_GPU -DENABLE_DOUBLE -O -DNDEBUG
-D_FORCE_INLINES --std=c++11
-I"/usr/local/MATLAB/R2018b/extern/include"
-I"/usr/local/MATLAB/R2018b/toolbox/distcomp/gpu/extern/include"
-gencode=arch=compute_50,code=\"sm_50,compute_50\"
--compiler-options=-fPIC
--compiler-options=-mssse3,-ffast-math  failed.

Error vl_compilenn (line 487)
      nvcc_compile(opts, srcs{i}, objfile, flags) ;

-----------------------------------------------------------------------------------------

my OS is Ubuntu 18.04.1

matlab version is: MATLAB 2018b

who can give me a hand?

Kind regards,

Pei

[Pei Liu]

Above error generated by command:

vl_compilenn('enableGpu',true,...
'cudaRoot','/usr/local/cuda-10.1',...
'cudaMethod','nvcc')

by the way, CUDA seems installed correct by input:

u@u-u:~$ nvcc -V

nvcc: NVIDIA (R) Cuda compiler driver
Copyright (c) 2005-2019 NVIDIA Corporation
Built on Fri_Feb__8_19:08:17_PST_2019
Cuda compilation tools, release 10.1, V10.1.105
correct by input nvcc -V, outputs are:

在 2019年3月13日星期三 UTC上午9:49:35，Pei Liu写道：

[Shi Yan]

the real problem here is the -O flag, it needs a number, change it to -O0 resolve the issue.

[Shi Yan]

resolved here https://github.com/vlfeat/matconvnet/pull/1214

[Umair Mukati]

Dear Shiyan, 

Thank you for your help. I was getting the same error earlier. Now, I am stuck at different point. I am not able to understand the source of this problem. For your reference, I am attaching a screenshot of this error.

Best regards,