/usr/include/ITK-4.9/lapack/double/dtgsen.h is in libinsighttoolkit4-dev 4.9.0-4ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 | extern int v3p_netlib_dtgsen_(
v3p_netlib_integer *ijob,
v3p_netlib_logical *wantq,
v3p_netlib_logical *wantz,
v3p_netlib_logical *select,
v3p_netlib_integer *n,
v3p_netlib_doublereal *a,
v3p_netlib_integer *lda,
v3p_netlib_doublereal *b,
v3p_netlib_integer *ldb,
v3p_netlib_doublereal *alphar,
v3p_netlib_doublereal *alphai,
v3p_netlib_doublereal *beta,
v3p_netlib_doublereal *q,
v3p_netlib_integer *ldq,
v3p_netlib_doublereal *z__,
v3p_netlib_integer *ldz,
v3p_netlib_integer *m,
v3p_netlib_doublereal *pl,
v3p_netlib_doublereal *pr,
v3p_netlib_doublereal *dif,
v3p_netlib_doublereal *work,
v3p_netlib_integer *lwork,
v3p_netlib_integer *iwork,
v3p_netlib_integer *liwork,
v3p_netlib_integer *info
);
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