Mex compile a C++ code

>> mex -setup Please choose your compiler for building external interface (MEX) files:

Would you like mex to locate installed compilers [y]/n? y

Select a compiler: [1] Lcc-win32 C 2.4.1 in C:\PROGRA~1\MATLAB\R2007b\sys\lcc

[0] None

Compiler: 1

Please verify your choices:

Compiler: Lcc-win32 C 2.4.1 Location: C:\PROGRA~1\MATLAB\R2007b\sys\lcc

Are these correct?([y]/n): y

Trying to update options file: C:\Users\hp\AppData\Roaming\MathWorks\MATLAB\R2007b\mexopts.bat From template: C:\PROGRA~1\MATLAB\R2007b\bin\win32\mexopts\lccopts.bat

Done . . .

>> mex yprime.c

C:\PROGRA~1\MATLAB\R2007B\BIN\MEX.PL: Error: 'yprime.c' not found.

??? Error using ==> mex at 208 Unable to complete successfully.

I could not able to compile a simple C code in my matlab. Even after installing Microsoft Visual C++ 6.0 compiler. its showing the above mentioned error. I am new to this topic can anybody help me out regarding it.

[Walter Roberson]

Is yprime.c definitely in your working directory? For example, if you try

!dir yprime.c

does it show the file?

Answer 1

[Jan]

"yprime.c" can be found in the examples folder. Either change into this directory:

cd(fullfile(matlabroot, 'extern', 'examples', 'mex'));
mex -O yprime.c

Or specify the file with the full path:

mex('-O', fullfile(matlabroot, 'extern', 'examples', 'mex', 'yprime.c')

If you do not have write permissions for this folder, copy the C-file to a folder you can access.

This is explained in the section "Building MEX-Files" in the documentation.

Answer 2

[Jan]

Please insert new information by editing your question - sending emails is less efficient and I dislike it, especially if it contains 5MB of data.

From your mail:

mex('-O', fullfile(matlabroot, 'extern', 'examples', 'compiler', 'yprime.c'))

Could Not Find C:\Program Files\MATLAB\R2007b\extern\examples\mex\yprime.exp

Something is confused now: Where does "extern\examples\compiler\" come from? yprime.c is in "extern\examples\mex\" - as in the error message. But then the error message and the shown code do not match?!

I suggest to start from the beginning: Delete the exp and lib files created in different folders, copy yprime.c to a new directory, add it to the Matlab PATH, CD to this directory and try to mex the C-file again. I recommend to use the MSVC compiler, because LCC cannot compile C++ code.