Function dtgsna_
extern(C) void dtgsna_
(
char* job,
char* howmny,
int* select,
int* n,
double* a,
int* lda,
double* b,
int* ldb,
double* vl,
int* ldvl,
double* vr,
int* ldvr,
double* s,
double* dif,
int* mm,
int* m,
double* work,
int* lwork,
int* iwork,
int* info,
int job_len,
int howmny_len
);