Dynamical linking with mex

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Moshe 2015-7-14

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https://ww2.mathworks.cn/matlabcentral/answers/229781-dynamical-linking-with-mex

编辑： Moshe 2015-7-24

I am compiling a C++ program using mex, in Mac OSX. The program is dynamically linked to various libraries. Compiling with g++ using the appropriate -I, -L, -l links works fine and the program runs. Using the same compilation line, with g++ replaced by mex, fails. Compilation is OK but at runtime the dynamical libraries are not found. Does mex use a different dynamical linker, with an environmental variable different from DYLD_LIBRARY_PATH? Or perhaps it uses a different shell (DYLD_LIBRARY_PATH is defined in my bash profile)?

Update:

The relevant part of the code is:

Lflags={['-L',intelroot,'/lib/'],['-L',mklroot,'/lib/']};

(mklroot and intelroot are the absolute paths to the root of the intel and MKL libraries folders).

lflags={'-lm', '-lpthread', '-liomp5', '-lmkl_intel_thread','-lmkl_core','-lmkl_intel_lp64'};

mex(VERBOSE,'-largeArrayDims', INCLUDES{:}, Lflags{:},lflags{:}, SRC{:});

The (MKL) libraries called are in DYLD_LIBRARY_PATH, as set in the Matlab startup file, using setenv (and verified by getenv), since apparently Matlab does not inherit the bash environment variables. The error message is: Library not loaded: libmkl_intel_thread.dylib.

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Dasharath Gulvady 2015-7-21

MATLAB must be able to pick up files referenced using DYLD_LIBRARY_PATH? What is the error message you are receiving? Does it work fine if you provide the absolute path of the location of the files?

Please note that in order for -L option to work you need to set the run-time library path in Mac:

http://www.mathworks.com/help/matlab/matlab_external/building-on-unix-operating-systems.html#f28833

Moshe 2015-7-24