Mex file-using c functions
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Hello all,
I have one question: I have a matlab wrapper that calls another C file that has some functions that I want to pass data to from Matlab and get results back to Matlab. But not successful!
The complication is: Whenever I compile the first c file (wrapper), it gives an mexw64 file (although I was told it is a dll) and when this happens and I just call this file Matlab cannot load this 2nd file that has the functions claiming that it is empty! Any ideas what am I doing wrong here?
For this second file (that has the functions) I was told to compile it like this:
gcc -c fcnsuite.c -DWINDOWS
dllwrap -o fcnsuite.dll fcnsuite.o
Using MingW, but it does not generate any dll and hence I get: dllwrap: no export definition file provided. Creating one, but that may not be what you want dllwrap: CreateProcess: No error
Any hints?
Thanks
回答（2 个）
Jan
2013-4-21
MEXW64 files are DLLs, although they have a different file extension.
What about compiling the wrapper and the core functions together:
mex -O wrapper.c fcnsuite.c
? Then the code of the fcnsuit is included in the wrapper DLL.
3 个评论
seldeeno
2013-4-22
Kaustubha Govind
2013-4-22
To be able to use the MEX command, you need to provide at least one C-file that contains an entry-point with the signature:
void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[]);
Do you have this in fcnsuite.c?
Also, it's not clear what you mean by "Why is not able to locate that dll for fcnsuite.c...". How do you use it in MATLAB, and what is the error that you see?
seldeeno
2013-4-22
seldeeno
2013-4-23
0 个投票
2 个评论
Victor Hugo Cantú
2018-9-20
I have the same problem as you (the same files !), I don't understand how you fixed the problem.
I have the same problem too. so what should I run for the fcnsuite.c ?
The complete set of functions may be found in the following C source code: fcnsuite.c and should be compiled as follows:
for linux:
gcc -c fcnsuite.c
ld -o fcnsuite.so -shared fcnsuite.o
for windows:
gcc -c fcnsuite.c -DWINDOWS
dllwrap -o fcnsuite.dll fcnsuite.o
We recommend the GCC compiler native in Linux and available for Windows from here www.mingw.org.
Binary versions are also directly available from here: fcnsuite.dll (Windows) or as fcnsuite.so (Linux Intel binary).
gcc -c fcnsuite.c -DWINDOWS
dllwrap -o fcnsuite.dll fcnsuite.o
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