#ifdef __cplusplusextern "C" { #endif  #include "f2c.h" int dlasd6_(integer *icompq, integer *nl, integer *nr, integer *sqre, doublereal *d__, doublereal *vf, doublereal *vl, doublereal *alpha, doublereal *beta, integer *idxq, integer *perm, integer *givptr, integer *givcol, integer *ldgcol, doublereal *givnum, integer *ldgnum, doublereal *poles, doublereal *difl, doublereal *difr, doublereal *z__, integer *k, doublereal *c__, doublereal *s, doublereal *work, integer *iwork, integer *info);#ifdef __cplusplus}#endif