Adjust kernel-features.h defaults for recvmsg and sendmsg
[glibc.git] / bits / inf.h
blob46fcf9f2df233197cd49f988f126dc79ccab1a03
1 /* Default `INFINITY' constant.
2 Copyright (C) 2004-2016 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
19 #ifndef _MATH_H
20 # error "Never use <bits/inf.h> directly; include <math.h> instead."
21 #endif
23 /* If we don't have real infinity, then we're supposed to produce a float
24 value that overflows at translation time, which is required to produce
25 a diagnostic. GCC's __builtin_inff produces a quite nice diagnostic
26 that tells the user that the target doesn't support infinities. */
28 #if __GNUC_PREREQ(3,3)
29 # define INFINITY (__builtin_inff())
30 #else
31 # define INFINITY (1e9999f)
32 #endif