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Mex cannot find mwblas?

Asked by Brian Searls on 22 Nov 2015
Latest activity Answered by Yuanlong Zhang on 26 Nov 2018
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?

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Tolentee on 21 Jan 2017
Please were you able to get a fix for this? Getting the same error too

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2 Answers

Walter Roberson
Answer by Walter Roberson
on 22 Nov 2015

  1 Comment

Brian Searls on 22 Nov 2015
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?

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Answer by Yuanlong Zhang on 26 Nov 2018

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

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