Call mex function using system()?
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Xingwang Yong on 3 Mar 2021
I downloaded a toolbox, which contains a pre-compiled mex file, foo.mexa64.
The calling syntax is a little bit confusing, but it works
system('/home/john/tools/foo.mexa64 param1 param2');
I tried to use
but I got an error, matlab says 'Invalid MEX-file, ...... cannot dynamically load executable'
It seems that this foo.mexa64 has been compiled to be an executable rather than a mex function. I searched the doc but it did not mention that I can build an executalbe with a suffix .mexa64.
Walter Roberson on 3 Mar 2021
In Linux, executables can have any valid file name. The file extension is not considered by the operating system when deciding how to execute the code. Instead, the "magic numbers" of the file are examined.
It happens that in MacOS and Linux, shared libraries and full programs have the same structure: shared libraries just do not happen to have an entry point marked in them.
... and .mex* files are, on all operating systems, shared libraries (in a format appropriate to the operating system.)
So, Yes, even if Linux cared about file extensions, the file type for a mexa64 is the same file type as for programs. But a typical mexa64 would not define a valid entry point.