mxGetPi - mxGetPiIsDeprecated error with Matlab R2018a

[patrikhuber]

Hi!

I'm getting these two errors when compiling with mexplus with Matlab R2018a.
It seems like the mxGetPi function that is used inside mexplus/mxarray.h is deprecated and no longer available in R2018a.

Error	C3861	'mxGetPiIsDeprecated': identifier not found	eos\3rdparty\mexplus\include\mexplus\mxarray.h	1013	
Error	C3861	'mxGetPiIsDeprecated': identifier not found	eos\3rdparty\mexplus\include\mexplus\mxarray.h	1102	

Is there an easy fix for this?
If not, don't worry too much about it - I am probably going to switch to the new Matlab C++ MEX API pretty soon, as soon as I find the time for it. It's pretty nice. Mathworks finally is giving us C++ bindings after 15+ (?) years of horrible C MEX API. link, link, link.

[kyamagu]

@patrikhuber Thanks, it seems Mathworks is updating C API with explicit typed accessors. That would require mexplus implementation update.
https://mathworks.com/help/matlab/matlab_external/c-matrix-api-typed-data-access.html

The new C++ API looks good. Perhaps you can give that a try.

[kyamagu]

Related: https://mathworks.com/help/matlab/matlab_external/matlab-support-for-interleaved-complex.html

[AchimTuran]

The mex command in MATLAB seems to define the macro MX_COMPAT_32 or MEX_DOUBLE_HANDLE to swith back to the old API.

If you already build MEX functions, MEX S-functions, or standalone MATLAB engine and MAT-file applications, then you should review the Do I Need to Upgrade My MEX Files to Use Interleaved Complex API? topic. To help transition your MEX files and S-functions to the interleaved complex API, MATLAB maintains a compatibility interface. To build MEX files with the compatibility interface, use the mex -R2017b flag. If your code processes complex numbers, you might notice a performance impact as MATLAB adapts your data to the interleaved complex format.
The mex command uses the -R2017b API by default. However, in a future version of MATLAB, mex will use the interleaved complex API -R2018a by default and then you need to modify your build command. Therefore, to ensure the desired behavior across versions of MATLAB, add the compatibility flag -R2017b to your build scripts.

Source: https://de.mathworks.com/help/matlab/matlab_external/matlab-support-for-interleaved-complex.html

[kyamagu]

@AchimTuran Thanks. Unfortunately, I do not have Matlab license anymore and cannot check the compatibility.