text: #include "Configuration.h"
  
  #ifdef ACCURATE_BED_LEVELING
  
  void daxpy ( int n, double da, double dx[], int incx, double dy[], int incy );
  double ddot ( int n, double dx[], int incx, double dy[], int incy );
  double dnrm2 ( int n, double x[], int incx );
  void dqrank ( double a[], int lda, int m, int n, double tol, int *kr, 
    int jpvt[], double qraux[] );
  void dqrdc ( double a[], int lda, int n, int p, double qraux[], int jpvt[], 
    double work[], int job );
  int dqrls ( double a[], int lda, int m, int n, double tol, int *kr, double b[], 
    double x[], double rsd[], int jpvt[], double qraux[], int itask );
  void dqrlss ( double a[], int lda, int m, int n, int kr, double b[], double x[], 
    double rsd[], int jpvt[], double qraux[] );
  int dqrsl ( double a[], int lda, int n, int k, double qraux[], double y[], 
    double qy[], double qty[], double b[], double rsd[], double ab[], int job );
  void dscal ( int n, double sa, double x[], int incx );
  void dswap ( int n, double x[], int incx, double y[], int incy );
  double *qr_solve ( int m, int n, double a[], double b[] );
  
  #endif
  