How to solve this error presented when compiling .cpp files to mex?

I have been attempting to solve this error but I could not found the root of the problem. I am using Matlab 2018a, windows 10 at x64. I installed manueally the MinGW64 Compiler version 5.3.0. I would appreciatte very much a hand of the community in this task. Thank you

mex -v imgcut3.cpp

Verbose mode is on.
... Looking for compiler 'MinGW64 Compiler (C++)' ...
... Looking for environment variable 'MW_MINGW64_LOC' ...Yes ('C:\x86_64-5.3.0-release-posix-seh-rt_v4-rev0\mingw64').
... Looking for file 'C:\x86_64-5.3.0-release-posix-seh-rt_v4-rev0\mingw64\bin\g++.exe' ...Yes.
... Looking for folder 'C:\x86_64-5.3.0-release-posix-seh-rt_v4-rev0\mingw64' ...Yes.
... Looking for environment variable 'MW_MINGW64_LOC' ...Yes ('C:\x86_64-5.3.0-release-posix-seh-rt_v4-rev0\mingw64').
... Executing command 'C:\x86_64-5.3.0-release-posix-seh-rt_v4-rev0\mingw64\bin\g++ -dumpmachine' ...Yes ('x86_64-w64-mingw32').
Found installed compiler 'MinGW64 Compiler (C++)'.
Set PATH = C:\x86_64-5.3.0-release-posix-seh-rt_v4-rev0\mingw64\bin;C:\Program Files\MATLAB\R2018a\extern\include\win64;C:\Program Files\MATLAB\R2018a\extern\include;C:\Program Files\MATLAB\R2018a\simulink\include;C:\Program Files\MATLAB\R2018a\lib\win64;C:\Program Files (x86)\Common Files\Oracle\Java\javapath;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files\MATLAB\R2018a\runtime\win64;C:\Program Files\MATLAB\R2018a\bin;C:\TDM-GCC-64\bin;C:\Users\DAVID\AppData\Local\Microsoft\WindowsApps;;C:\Program Files\Mozilla Firefox
Set INCLUDE = C:\x86_64-5.3.0-release-posix-seh-rt_v4-rev0\mingw64\include;C:\x86_64-5.3.0-release-posix-seh-rt_v4-rev0\mingw64\x86_64-w64-mingw32\include\c++;C:\x86_64-5.3.0-release-posix-seh-rt_v4-rev0\mingw64\x86_64-w64-mingw32\include;C:\x86_64-5.3.0-release-posix-seh-rt_v4-rev0\mingw64\x86_64-w64-mingw32\include\c++\x86_64-w64-mingw32;C:\x86_64-5.3.0-release-posix-seh-rt_v4-rev0\mingw64\x86_64-w64-mingw32\include\c++\backward;C:\x86_64-5.3.0-release-posix-seh-rt_v4-rev0\mingw64\include;C:\x86_64-5.3.0-release-posix-seh-rt_v4-rev0\mingw64\x86_64-w64-mingw32\include\c++;C:\x86_64-5.3.0-release-posix-seh-rt_v4-rev0\mingw64\x86_64-w64-mingw32\include;C:\x86_64-5.3.0-release-posix-seh-rt_v4-rev0\mingw64\x86_64-w64-mingw32\include\c++\x86_64-w64-mingw32;C:\x86_64-5.3.0-release-posix-seh-rt_v4-rev0\mingw64\x86_64-w64-mingw32\include\c++\backward;
Set LIB = C:\x86_64-5.3.0-release-posix-seh-rt_v4-rev0\mingw64\lib;;C:\x86_64-5.3.0-release-posix-seh-rt_v4-rev0\mingw64\lib;;
Set MW_TARGET_ARCH = win64;win64;
Set LIBPATH = C:\Program Files\MATLAB\R2018a\extern\lib\win64;C:\Program Files\MATLAB\R2018a\extern\lib\win64;
Options file details
-------------------------------------------------------------------
	Compiler location: C:\x86_64-5.3.0-release-posix-seh-rt_v4-rev0\mingw64
	Options file: C:\Users\DAVID\AppData\Roaming\MathWorks\MATLAB\R2018a\mex_C++_win64.xml
	CMDLINE2 : C:\x86_64-5.3.0-release-posix-seh-rt_v4-rev0\mingw64\bin\g++ -m64 -Wl,--no-undefined -shared -static -s -Wl,"C:\Program Files\MATLAB\R2018a/extern/lib/win64/mingw64/exportsmexfileversion.def" C:\Users\DAVID\AppData\Local\Temp\mex_192127030071693_10192\imgcut3.obj C:\Users\DAVID\AppData\Local\Temp\mex_192127030071693_10192\cpp_mexapi_version.obj   -L"C:\Program Files\MATLAB\R2018a\extern\lib\win64\mingw64" -llibmx -llibmex -llibmat -lm -llibmwlapack -llibmwblas -llibMatlabDataArray -llibMatlabEngine -o imgcut3.mexw64
	CXX : C:\x86_64-5.3.0-release-posix-seh-rt_v4-rev0\mingw64\bin\g++
	COMPILER : C:\x86_64-5.3.0-release-posix-seh-rt_v4-rev0\mingw64\bin\g++
	DEFINES : -DMATLAB_DEFAULT_RELEASE=R2017b  -DUSE_MEX_CMD   -m64 -DMATLAB_MEX_FILE 
	MATLABMEX : -DMATLAB_MEX_FILE 
	CFLAGS : -fexceptions -fno-omit-frame-pointer
	CXXFLAGS : -fexceptions -fno-omit-frame-pointer -std=c++11
	INCLUDE : -I"C:\Program Files\MATLAB\R2018a/extern/include" -I"C:\Program Files\MATLAB\R2018a/simulink/include"
	CXXOPTIMFLAGS : -O -DNDEBUG
	CXXDEBUGFLAGS : -g
	LDXX : C:\x86_64-5.3.0-release-posix-seh-rt_v4-rev0\mingw64\bin\g++
	LINKER : C:\x86_64-5.3.0-release-posix-seh-rt_v4-rev0\mingw64\bin\g++
	LDFLAGS : -m64 -Wl,--no-undefined
	LDTYPE : -shared -static
	LINKEXPORT : -Wl,"C:\Program Files\MATLAB\R2018a/extern/lib/win64/mingw64/mexFunction.def"
	LINKEXPORTVER : -Wl,"C:\Program Files\MATLAB\R2018a/extern/lib/win64/mingw64/exportsmexfileversion.def"
	LIBLOC : C:\Program Files\MATLAB\R2018a\extern\lib\win64\mingw64
	LINKLIBS : -L"C:\Program Files\MATLAB\R2018a\extern\lib\win64\mingw64" -llibmx -llibmex -llibmat -lm -llibmwlapack -llibmwblas -llibMatlabDataArray -llibMatlabEngine
	LDOPTIMFLAGS : -s
	LDDEBUGFLAGS : -g
	OBJEXT : .obj
	LDEXT : .mexw64
	SETENV : set COMPILER=C:\x86_64-5.3.0-release-posix-seh-rt_v4-rev0\mingw64\bin\gcc
                set CXXCOMPILER=C:\x86_64-5.3.0-release-posix-seh-rt_v4-rev0\mingw64\bin\g++
                set COMPFLAGS=-c -fexceptions -fno-omit-frame-pointer -DMATLAB_DEFAULT_RELEASE=R2017b  -DUSE_MEX_CMD   -m64 -DMATLAB_MEX_FILE  -DMATLAB_MEX_FILE 
                set CXXCOMPFLAGS=-c -fexceptions -fno-omit-frame-pointer -std=c++11 -DMATLAB_DEFAULT_RELEASE=R2017b  -DUSE_MEX_CMD   -m64 -DMATLAB_MEX_FILE  -DMATLAB_MEX_FILE 
                set OPTIMFLAGS=-O -DNDEBUG
                set DEBUGFLAGS=-g
                set LINKER=C:\x86_64-5.3.0-release-posix-seh-rt_v4-rev0\mingw64\bin\gcc
                set CXXLINKER=C:\x86_64-5.3.0-release-posix-seh-rt_v4-rev0\mingw64\bin\g++
                set LINKFLAGS=-m64 -Wl,--no-undefined -shared -static -L"C:\Program Files\MATLAB\R2018a\extern\lib\win64\mingw64" -llibmx -llibmex -llibmat -lm -llibmwlapack -llibmwblas -llibMatlabDataArray -llibMatlabEngine -Wl,"C:\Program Files\MATLAB\R2018a/extern/lib/win64/mingw64/mexFunction.def"
                set LINKDEBUGFLAGS=-g
                set NAME_OUTPUT= -o "%OUTDIR%%MEX_NAME%%MEX_EXT%"
	MINGWROOT : C:\x86_64-5.3.0-release-posix-seh-rt_v4-rev0\mingw64
	MINGWTARGET : x86_64-w64-mingw32
	MATLABROOT : C:\Program Files\MATLAB\R2018a
	ARCH : win64
	SRC : "C:\IJDAR-Binarization\imgcut3.cpp";"C:\Program Files\MATLAB\R2018a\extern\version\cpp_mexapi_version.cpp"
	OBJ : C:\Users\DAVID\AppData\Local\Temp\mex_192127030071693_10192\imgcut3.obj;C:\Users\DAVID\AppData\Local\Temp\mex_192127030071693_10192\cpp_mexapi_version.obj
	OBJS : C:\Users\DAVID\AppData\Local\Temp\mex_192127030071693_10192\imgcut3.obj C:\Users\DAVID\AppData\Local\Temp\mex_192127030071693_10192\cpp_mexapi_version.obj 
	SRCROOT : C:\IJDAR-Binarization\imgcut3
	DEF : C:\Users\DAVID\AppData\Local\Temp\mex_192127030071693_10192\imgcut3.def
	EXP : "imgcut3.exp"
	LIB : "imgcut3.lib"
	EXE : imgcut3.mexw64
	ILK : "imgcut3.ilk"
	MANIFEST : "imgcut3.mexw64.manifest"
	TEMPNAME : imgcut3
	EXEDIR : 
	EXENAME : imgcut3
	OPTIM : -O -DNDEBUG
	LINKOPTIM : -s
	CMDLINE1_0 : C:\x86_64-5.3.0-release-posix-seh-rt_v4-rev0\mingw64\bin\g++ -c -DMATLAB_DEFAULT_RELEASE=R2017b  -DUSE_MEX_CMD   -m64 -DMATLAB_MEX_FILE  -I"C:\Program Files\MATLAB\R2018a/extern/include" -I"C:\Program Files\MATLAB\R2018a/simulink/include" -fexceptions -fno-omit-frame-pointer -std=c++11 -O -DNDEBUG "C:\IJDAR-Binarization\imgcut3.cpp" -o C:\Users\DAVID\AppData\Local\Temp\mex_192127030071693_10192\imgcut3.obj
	CMDLINE1_1 : C:\x86_64-5.3.0-release-posix-seh-rt_v4-rev0\mingw64\bin\g++ -c -DMATLAB_DEFAULT_RELEASE=R2017b  -DUSE_MEX_CMD   -m64 -DMATLAB_MEX_FILE  -I"C:\Program Files\MATLAB\R2018a/extern/include" -I"C:\Program Files\MATLAB\R2018a/simulink/include" -fexceptions -fno-omit-frame-pointer -std=c++11 -O -DNDEBUG "C:\Program Files\MATLAB\R2018a\extern\version\cpp_mexapi_version.cpp" -o C:\Users\DAVID\AppData\Local\Temp\mex_192127030071693_10192\cpp_mexapi_version.obj
-------------------------------------------------------------------
Building with 'MinGW64 Compiler (C++)'.
C:\x86_64-5.3.0-release-posix-seh-rt_v4-rev0\mingw64\bin\g++ -c -DMATLAB_DEFAULT_RELEASE=R2017b  -DUSE_MEX_CMD   -m64 -DMATLAB_MEX_FILE  -I"C:\Program Files\MATLAB\R2018a/extern/include" -I"C:\Program Files\MATLAB\R2018a/simulink/include" -fexceptions -fno-omit-frame-pointer -std=c++11 -O -DNDEBUG "C:\IJDAR-Binarization\imgcut3.cpp" -o C:\Users\DAVID\AppData\Local\Temp\mex_192127030071693_10192\imgcut3.obj

Error using mex

C:\IJDAR-Binarization\imgcut3.cpp: In function 'void mexFunction(int, mxArray**, int, const mxArray**)':

C:\IJDAR-Binarization\imgcut3.cpp:43:44: error: cannot convert 'const mwSize* {aka const long long unsigned int*}' to

'const int*' in initialization

const int *dim1 = mxGetDimensions(prhs[0]);

^

C:\IJDAR-Binarization\imgcut3.cpp:44:44: error: cannot convert 'const mwSize* {aka const long long unsigned int*}' to

'const int*' in initialization

const int *dim2 = mxGetDimensions(prhs[1]);

^

C:\IJDAR-Binarization\imgcut3.cpp:52:10: error: cannot convert 'const mwSize* {aka const long long unsigned int*}' to

'const int*' in assignment

dim2 = mxGetDimensions(prhs[2+i]);

^

C:\IJDAR-Binarization\imgcut3.cpp:106:68: error: cannot convert 'const int*' to 'const mwSize* {aka const long long

unsigned int*}' for argument '2' to 'mxArray* mxCreateNumericArray_730(mwSize, const mwSize*, mxClassID,

mxComplexity)'

plhs[0] = mxCreateNumericArray(ndim, dim1, mxDOUBLE_CLASS, mxREAL);

^

Answer 1

[Walter Roberson]

   const int *dim1 = mxGetDimensions(prhs[0]);

mxGetDimensions does not return int*

https://www.mathworks.com/help/matlab/apiref/mxgetdimensions.html

   const mwSize *mxGetDimensions(const mxArray *pm);

it returns mwSize*

Answer 2

[Geoff Hayes]

Farouk - from mxGetDimensions (C and Fortran), the signature for this function is

const mwSize *mxGetDimensions(const mxArray *pm);

which means that your code should be

const mwSize *dim1 = mxGetDimensions(prhs[0]);

where you use mwSize instead of int. This change should also fix the error with

 plhs[0] = mxCreateNumericArray(ndim, dim1, mxDOUBLE_CLASS, mxREAL);

since dim1 will now be of type mwSize.