void LAPACK_dtrexc	(	char *	compq,
		lapack_int *	n,
		double *	t,
		lapack_int *	ldt,
		double *	q,
		lapack_int *	ldq,
		lapack_int *	ifst,
		lapack_int *	ilst,
		double *	work,
		lapack_int *	info
	)