c++ - error in mex: undefined reference to ".." -

i want compile following code mexw64 using ms visual c++ compiler.

balltree.cpp

#define mex #include "balltree.h" #include "mex.h"  void mexfunction(int nlhs, mxarray *plhs[], int nrhs, const mxarray *prhs[]) {    // check right number of arguments   if(nrhs != 2)     mexerrmsgtxt("takes 2 input arguments");   if(nlhs != 1)     mexerrmsgtxt("outputs 1 result (a structure)");  //                                   points, weights   plhs[0] = balltree::createinmatlab(prhs[0],prhs[1]);  } 

and balltree.h

#ifndef __ball_tree_h #define __ball_tree_h  #ifdef mex #include "mex.h" #endif  #include <math.h> #include <stdint.h> #define false 0 #define true 1  double log(double); double exp(double); double sqrt(double); double pow(double , double); double fabs(double); #define pi 3.141592653589   class balltree {  public:   //typedef unsigned int index;              // define "index" type (long)   typedef uint32_t index;              // define "index" type (long)   const static balltree::index no_child = (index) -1;  // indicates no further children    /////////////////////////////   // constructors   /////////////////////////////    //balltree( unsigned int d, index n, double* centers_,   //     double* ranges_, double* weights_ ); #ifdef mex   balltree();   balltree(const mxarray* structure);     // loading ball trees matlab    // creating balltree structures in matlab:   static mxarray*  createinmatlab(const mxarray* pts, const mxarray* wts); #endif    /////////////////////////////   // accessor functions     /////////////////////////////   balltree::index root() const              { return 0; }   unsigned int    ndim() const              { return dims; }   index npts()                    const { return num_points; }   index npts(balltree::index i)   const { return highest_leaf[i]-lowest_leaf[i]+1; }   const double* center(balltree::index i)   const { return centers+i*dims; }   const double* range(balltree::index i)    const { return ranges +i*dims; }   double  weight(balltree::index i)         const { return *(weights+i); }   bool isleaf(balltree::index ind)          const { return ind >= num_points; }   bool validindex(balltree::index ind)      const { return ((0<=ind) && (ind < 2*num_points)); }   balltree::index left(balltree::index i)   const { return left_child[i]; }   balltree::index right(balltree::index i)  const { return right_child[i]; }   balltree::index leaffirst(balltree::index i) const { return lowest_leaf[i]; }   balltree::index leaflast(balltree::index i)  const { return highest_leaf[i]; }    // convert balltree::index numeric index in original data   index getindexof(balltree::index i) const { return permutation[i]; }    void movepoints(double*);   void changeweights(const double *);    // test 2 sub-trees see nearer balltree   balltree::index closer(balltree::index, balltree::index, const balltree&,balltree::index) const;     balltree::index closer(balltree::index i, balltree::index j, const balltree& other_tree) const       { return closer(i,j,other_tree,other_tree.root()); };    void knearestneighbors(index *, double *, const double *, int, int) const;    /////////////////////////////   // private class f'ns   /////////////////////////////  protected: #ifdef mex   static mxarray*  matlabmakestruct(const mxarray* pts, const mxarray* wts); #endif   virtual void calcstats(balltree::index);     // construction recursion    unsigned int dims;             // dimension of data    balltree::index num_points;     // # of points    double *centers;                // ball centers, dims numbers per ball    double *ranges;                 // bounding box ranges, dims per ball, dist center 1 side   double *weights;                // total weight in each ball     balltree::index *left_child,  *right_child;  // left, right children; no parent indices   balltree::index *lowest_leaf, *highest_leaf; // lower & upper leaf indices each ball   balltree::index *permutation;                // point's position in original data    balltree::index next;                        // internal var placing non-leaf nodes     static const char *field_names[];            // list of matlab structure fields   static const int nfields;    // building ball tree   void buildball(balltree::index firstleaf, balltree::index lastleaf, balltree::index root);   balltree::index most_spread_coord(balltree::index, balltree::index) const;   balltree::index partition(unsigned int dim, balltree::index low, balltree::index high);   virtual void swap(balltree::index, balltree::index);         // leaf-swapping function    void select(unsigned int dimension, index position,                 index low, index high);    double mindist(index, const double*) const;   double maxdist(index, const double*) const;    // build non-leaf nodes leaves   void buildtree(); };  #endif 

but following compiler error: " balltree.obj:balltree.cpp:(.text+0x3a): undefined reference balltree::createinmatlab(mxarray_tag const*, mxarray_tag const*)' " has been noted in toolbox website that:

" ms visual c++ has bug in dealing "static const" variables; think there patch available, or can change these #defines. operate class' parent directory, or add matlab path (e.g. if unzip "myhome/@kde", cd in matlab "myhome" dir, or add path.) ".

i have used compilers such g++ , gcc still fails compile.

your answer right there in @kde/mex/makemex.m (http://www.ics.uci.edu/~ihler/code/kde.tar.gz). build command balltree.cpp is:

mex balltree.cpp cpp/balltreeclass.cc 

note have include implementation file (cpp/balltreeclass.cc).

balltree::createinmatlab(...) defined on line 432 of balltreeclass.cc.

you want run makemex.m instead of trying yourself.