/usr/include/gsl/gsl_sys.h is in libgsl-dev 2.4+dfsg-6.
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 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 | /* sys/gsl_sys.h
*
* Copyright (C) 1996, 1997, 1998, 1999, 2000, 2007 Gerard Jungman, Brian Gough
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef __GSL_SYS_H__
#define __GSL_SYS_H__
#undef __BEGIN_DECLS
#undef __END_DECLS
#ifdef __cplusplus
# define __BEGIN_DECLS extern "C" {
# define __END_DECLS }
#else
# define __BEGIN_DECLS /* empty */
# define __END_DECLS /* empty */
#endif
__BEGIN_DECLS
double gsl_log1p (const double x);
double gsl_expm1 (const double x);
double gsl_hypot (const double x, const double y);
double gsl_hypot3 (const double x, const double y, const double z);
double gsl_acosh (const double x);
double gsl_asinh (const double x);
double gsl_atanh (const double x);
int gsl_isnan (const double x);
int gsl_isinf (const double x);
int gsl_finite (const double x);
double gsl_nan (void);
double gsl_posinf (void);
double gsl_neginf (void);
double gsl_fdiv (const double x, const double y);
double gsl_coerce_double (const double x);
float gsl_coerce_float (const float x);
long double gsl_coerce_long_double (const long double x);
double gsl_ldexp(const double x, const int e);
double gsl_frexp(const double x, int * e);
int gsl_fcmp (const double x1, const double x2, const double epsilon);
__END_DECLS
#endif /* __GSL_SYS_H__ */
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