Incompatible library version problem or possible library path issue because it was unexpected that libmwsdrrdriver.dylib requires version 1.0.0 or later, but librtlsdr.0.dylib provides version 0.0.0.

Hello,

I am using Matlab RTL-SDR add-on on my macbook pro (El Capitan ver. 10.11.6) for receiving live RF sample data rom a RF front-end. Everything was ok before this morning when I install _ cmake_ on my macbook pro.

Now when I started running my RF data acquisition matlab files, the error message immediately comes out. I suspect that there are some changes happened on library paths configuration, but I don't know how to solve it.

Please help and TIA!

Shu

Invalid MEX-file '/Users/swang/Documents/MATLAB/SupportPackages/R2016a/toolbox/shared/sdr/sdrr/sdrrmex/sdrrmapi.mexmaci64':
dlopen(/Users/swang/Documents/MATLAB/SupportPackages/R2016a/toolbox/shared/sdr/sdrr/sdrrmex/sdrrmapi.mexmaci64, 6): Library
not loaded: @rpath/librtlsdr.0.dylib
  Referenced from:
  /Users/swang/Documents/MATLAB/SupportPackages/R2016a/toolbox/shared/sdr/sdrr/bin/maci64/libmwsdrrdriver.dylib
  Reason: Incompatible library version: libmwsdrrdriver.dylib requires version 1.0.0 or later, but librtlsdr.0.dylib
  provides version 0.0.0

Error in sdrr_mapiPrivate (line 39)
      [varargout{1}, errStat, errId, errStr] = sdrrmapi(cmd_m, varargin{:});

Error in sdrr_openDataConnection (line 6)
[driverHandle, errStat, errId, errStr] = sdrr_mapiPrivate('openDataConnection', devConn, dataXfer, runResetAndInit);

Error in comm.SDRRTLReceiver/connect

Error in comm.SDRRTLReceiver/initialize

Error in comm.SDRRTLReceiver/infoImpl

Error in RtlSdrV3GpsSampler (line 54)
Gps.Rf.sdrHwInfo = info( Gps.Rf.radio ) ;

Answer 1

[Sebastiaan VV]

I know this is an old question. But as Google had only one search result for this exact issue, being this unanswered question, I decided to post the solution I came up with anyway.

A quick and dirty "fix" to get the proper version of librtlsdr loaded is by starting MATLAB using command

DYLD_LIBRARY_PATH="/Users/swang/Documents/MATLAB/SupportPackages/R2016a/toolbox/shared/sdr/sdrr/bin/maci64/" /Applications/MATLAB_R2016a.app/Contents/MacOS/MATLAB

from the Terminal.

If you want it properly fixed, you should read up upon macOS libraries and @rpath, some starting points:

https://wincent.com/wiki/@executable_path,_@load_path_and_@rpath

https://www.mikeash.com/pyblog/friday-qa-2009-11-06-linking-and-install-names.html

https://developer.apple.com/library/content/documentation/DeveloperTools/Conceptual/DynamicLibraries/000-Introduction/Introduction.html

otool -l and install_name_tool

[Walter Roberson]

Note: DYLD_LIBRARY_PATH is not always respected in Sierra and later.