/usr/include/ITK-4.5/lapack/single/slapy2.h is in libinsighttoolkit4-dev 4.5.0-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 | extern v3p_netlib_E_f v3p_netlib_slapy2_(
v3p_netlib_real *x,
v3p_netlib_real *y
);
|