Mex cannot find mwblas?

Error using mex
MEX cannot find library 'mwblas' specified with the -l option.
 MEX looks for a file with one of the names:
 libmwblas.lib
 mwblas.lib
 Please specify the path to this library with the -L option.

Has anyone seen this before?

I'm trying to run vl_compilenn from a neural net pack, and I get this when I compile. Any ideas?

[Tolentee]

Please were you able to get a fix for this? Getting the same error too

[Nan Jiang]

I have the same question too.

Answer 1

[Walter Roberson]

Did you use the structure shown at http://www.mathworks.com/help/matlab/matlab_external/calling-lapack-and-blas-functions-from-mex-files.html ?

[Brian Searls]

This is the file I'm trying to run. I compiled it using a more verbose level and I got this message,

Set INCLUDE = C:\TDM-GCC-64\\include;
Set LIB = C:\TDM-GCC-64\\lib;;
Set MW_TARGET_ARCH = win64;
Set LIBPATH = C:\Program Files\MATLAB\R2015b\extern\lib\win64;
Error using mex
MEX cannot find library 'mwblas' specified with the -l option.
 MEX looks for a file with one of the names:
 libmwblas.lib
 mwblas.lib
 Please specify the path to this library with the -L option.

For some reason it gets to this line, and errors out. Do you have any idea what would cause this?

Answer 2

[Yuanlong Zhang]

Thia error occurs when you try to use libmwblas.dll with a .cpp file, while everything is correct with .c file. Just try

mex '-LC:\Program Files\MATLAB\R2017b\extern\lib\win64\microsoft' -lmwblas your_file.cpp