error C2440 While using MATLAB Coder with Custom FFT library callback

I have simple script function [RetVal] = MatLabFFTW(CapWave) TempVal = fft(CapWave); RetVal = real(sum(TempVal)); end

When I tried to convert this script to DLL using Coder; I got following compilation errors:

Script\codegen\dll\MatLabFFTW\MatLabFFTW.cpp(102) : error C2440: '=' : cannot convert from 'void ' to 'double *'         Conversion from 'void' to pointer to non-'void' requires an explicit cast Script\codegen\dll\MatLabFFTW\MatLabFFTW.cpp(110) : error C2440: '=' : cannot convert from 'void ' to 'fftw_complex (*)'         Conversion from 'void' to pointer to non-'void' requires an explicit cast Script\codegen\dll\MatLabFFTW\MatLabFFTW.cpp(111) : error C2664: 'void fftw_execute_dft_r2c(const fftw_plan,double ,fftw_complex (*))' : cannot convert argument 1 from 'void *' to 'const fftw_plan'         Conversion from 'void' to pointer to non-'void' requires an explicit cast Script\codegen\dll\MatLabFFTW\MatLabFFTW.cpp(146) : error C2440: '=' : cannot convert from 'void ' to 'double *'         Conversion from 'void' to pointer to non-'void' requires an explicit cast Script\codegen\dll\MatLabFFTW\MatLabFFTW.cpp(147) : error C2440: '=' : cannot convert from 'void ' to 'fftw_complex (*)'         Conversion from 'void' to pointer to non-'void' requires an explicit cast Script\codegen\dll\MatLabFFTW\MatLabFFTW.cpp(189) : error C2664: 'void fftw_destroy_plan(fftw_plan)' : cannot convert argument 1 from 'void ' to 'fftw_plan'         Conversion from 'void' to pointer to non-'void' requires an explicit cast

Note: 1) I am using the Custom FFT library callback option to use our own FFTW 2) When select the language as 'C' then there is no problem in compiling the DLL but choosing C++ giving this compiler error 3) I am using Visual Studio 2013 compiler

Please help me to solve this issue.

Answer 1

[Ryan Livingston]

This is a bug and has been reported to the MATLAB Coder development team. Thank you for reporting it.

As you've seen, generating C code will work around the issue.