VL_feat Matlab GCC 无法编译

Question

我试图按照此处的说明在 matlab 中编译函数 c_eoverlap：

http://www.robots.ox.ac.uk/~vgg/research/affine/evaluation.html#eval_soft

当然，它不会成功...我的 Matlab 版本是 2018a，这是很新的，gcc -v 输出以下内容

另外附上这个长错误日志，因为我是 C++ 的新手，如果需要任何其他信息，请告诉我，感谢您的帮助！

>> mex repeatability/c_eoverlap.cxx
Building with 'Xcode Clang++'.
Error using mex
/Users/lucius/Desktop/ua/805/a1/repeatability/c_eoverlap.cxx:34:14: error: cannot initialize
a variable of type 'const int *' with an rvalue of type 'const mwSize *' (aka 'const unsigned
long *')
  int const *dims1 = mxGetDimensions(prhs[0]);
             ^       ~~~~~~~~~~~~~~~~~~~~~~~~
/Users/lucius/Desktop/ua/805/a1/repeatability/c_eoverlap.cxx:36:14: error: cannot initialize
a variable of type 'const int *' with an rvalue of type 'const mwSize *' (aka 'const unsigned
long *')
  int const *dims2 = mxGetDimensions(prhs[1]);
             ^       ~~~~~~~~~~~~~~~~~~~~~~~~
/Users/lucius/Desktop/ua/805/a1/repeatability/c_eoverlap.cxx:38:14: error: cannot initialize
a variable of type 'const int *' with an rvalue of type 'const mwSize *' (aka 'const unsigned
long *')
  int const *dims3 = mxGetDimensions(prhs[2]);
             ^       ~~~~~~~~~~~~~~~~~~~~~~~~
/Users/lucius/Desktop/ua/805/a1/repeatability/c_eoverlap.cxx:46:13: error: no matching
function for call to 'mxCreateNumericArray_730'
  plhs[0] = mxCreateNumericArray(2, odim, mxDOUBLE_CLASS, mxREAL);
            ^~~~~~~~~~~~~~~~~~~~
/Applications/MATLAB_R2018a.app/extern/include/matrix.h:282:30: note: expanded from macro
'mxCreateNumericArray'
#define mxCreateNumericArray mxCreateNumericArray_730
                             ^~~~~~~~~~~~~~~~~~~~~~~~
/Applications/MATLAB_R2018a.app/extern/include/matrix.h:1256:1: note: candidate function not
viable: no known conversion from 'int *' to 'const mwSize *' (aka 'const unsigned long *')
for 2nd argument
mxCreateNumericArray(mwSize ndim, const mwSize *dims, mxClassID classid, mxComplexity flag);
^
/Applications/MATLAB_R2018a.app/extern/include/matrix.h:282:30: note: expanded from macro
'mxCreateNumericArray'
#define mxCreateNumericArray mxCreateNumericArray_730
                             ^
/Users/lucius/Desktop/ua/805/a1/repeatability/c_eoverlap.cxx:47:13: error: no matching
function for call to 'mxCreateNumericArray_730'
  plhs[1] = mxCreateNumericArray(2, odim, mxDOUBLE_CLASS, mxREAL);
            ^~~~~~~~~~~~~~~~~~~~
/Applications/MATLAB_R2018a.app/extern/include/matrix.h:282:30: note: expanded from macro
'mxCreateNumericArray'
#define mxCreateNumericArray mxCreateNumericArray_730
                             ^~~~~~~~~~~~~~~~~~~~~~~~
/Applications/MATLAB_R2018a.app/extern/include/matrix.h:1256:1: note: candidate function not
viable: no known conversion from 'int *' to 'const mwSize *' (aka 'const unsigned long *')
for 2nd argument
mxCreateNumericArray(mwSize ndim, const mwSize *dims, mxClassID classid, mxComplexity flag);
^
/Applications/MATLAB_R2018a.app/extern/include/matrix.h:282:30: note: expanded from macro
'mxCreateNumericArray'
#define mxCreateNumericArray mxCreateNumericArray_730
                             ^
/Users/lucius/Desktop/ua/805/a1/repeatability/c_eoverlap.cxx:48:13: error: no matching
function for call to 'mxCreateNumericArray_730'
  plhs[2] = mxCreateNumericArray(2, odim, mxDOUBLE_CLASS, mxREAL);
            ^~~~~~~~~~~~~~~~~~~~
/Applications/MATLAB_R2018a.app/extern/include/matrix.h:282:30: note: expanded from macro
'mxCreateNumericArray'
#define mxCreateNumericArray mxCreateNumericArray_730
                             ^~~~~~~~~~~~~~~~~~~~~~~~
/Applications/MATLAB_R2018a.app/extern/include/matrix.h:1256:1: note: candidate function not
viable: no known conversion from 'int *' to 'const mwSize *' (aka 'const unsigned long *')
for 2nd argument
mxCreateNumericArray(mwSize ndim, const mwSize *dims, mxClassID classid, mxComplexity flag);
^
/Applications/MATLAB_R2018a.app/extern/include/matrix.h:282:30: note: expanded from macro
'mxCreateNumericArray'
#define mxCreateNumericArray mxCreateNumericArray_730
                             ^
/Users/lucius/Desktop/ua/805/a1/repeatability/c_eoverlap.cxx:49:13: error: no matching
function for call to 'mxCreateNumericArray_730'
  plhs[3] = mxCreateNumericArray(2, odim, mxDOUBLE_CLASS, mxREAL);
            ^~~~~~~~~~~~~~~~~~~~
/Applications/MATLAB_R2018a.app/extern/include/matrix.h:282:30: note: expanded from macro
'mxCreateNumericArray'
#define mxCreateNumericArray mxCreateNumericArray_730
                             ^~~~~~~~~~~~~~~~~~~~~~~~
/Applications/MATLAB_R2018a.app/extern/include/matrix.h:1256:1: note: candidate function not
viable: no known conversion from 'int *' to 'const mwSize *' (aka 'const unsigned long *')
for 2nd argument
mxCreateNumericArray(mwSize ndim, const mwSize *dims, mxClassID classid, mxComplexity flag);
^
/Applications/MATLAB_R2018a.app/extern/include/matrix.h:282:30: note: expanded from macro
'mxCreateNumericArray'
#define mxCreateNumericArray mxCreateNumericArray_730
                             ^
/Users/lucius/Desktop/ua/805/a1/repeatability/c_eoverlap.cxx:198:3: warning: 'delete[]'
applied to a pointer that was allocated with 'new'; did you mean 'delete'?
[-Wmismatched-new-delete]
  delete []tdesc_out;
  ^     ~~~

/Users/lucius/Desktop/ua/805/a1/repeatability/c_eoverlap.cxx:62:22: note: allocated with
'new' here
  float *tdesc_out = new float[dims2[1]*dims1[1]];
                     ^
/Users/lucius/Desktop/ua/805/a1/repeatability/c_eoverlap.cxx:199:3: warning: 'delete[]'
applied to a pointer that was allocated with 'new'; did you mean 'delete'?
[-Wmismatched-new-delete]
  delete []tover_out;
  ^     ~~~

/Users/lucius/Desktop/ua/805/a1/repeatability/c_eoverlap.cxx:63:22: note: allocated with
'new' here
  float *tover_out = new float[dims2[1]*dims1[1]];
                     ^
2 warnings and 7 errors generated.

Answer 1

您需要将 -compatibleArrayDims 添加到您的 mex 命令中：

mex -compatibleArrayDims c_eoverlap.cxx

该代码是为使用 32 位整数 (int) 作为数组大小的旧版 MATLAB 编写的。现在这些是 64 位 (mwSize)。该选项强制接口像在旧版 MATLAB 中那样工作。有关详细信息，请参阅 the mex documentation。

关于使用 delete[] 而不是 delete 有一些可怕的警告。这只是警告，因此它会编译，但您不知道代码是否会执行预期的操作。

VL_feat Matlab GCC 无法编译

VL_feat Matlab GCC can't compile

c++

matlab

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