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

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Farouk Suleiman
Farouk Suleiman 2020 年 1 月 24 日
回答済み: Geoff Hayes 2020 年 1 月 24 日
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);
^

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回答 (2 件)

Walter Roberson
Walter Roberson 2020 年 1 月 24 日
const int *dim1 = mxGetDimensions(prhs[0]);
mxGetDimensions does not return int*
const mwSize *mxGetDimensions(const mxArray *pm);
it returns mwSize*

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Geoff Hayes
Geoff Hayes 2020 年 1 月 24 日
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.

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