/usr/include/octave-3.8.2/octave/mx-cdm-m.h is in liboctave-dev 3.8.2-4.
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 | // DO NOT EDIT -- generated by mk-ops
#if !defined (octave_mx_cdm_m_h)
#define octave_mx_cdm_m_h 1
#include "CMatrix.h"
#include "CDiagMatrix.h"
#include "dMatrix.h"
#include "mx-op-decl.h"
DMM_BIN_OP_DECLS (ComplexMatrix, ComplexDiagMatrix, Matrix, OCTAVE_API)
#endif
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