1 // <ctgmath> -*- C++ -*-
3 // Copyright (C) 2007-2025 Free Software Foundation, Inc.
5 // This file is part of the GNU ISO C++ Library. This library is free
6 // software; you can redistribute it and/or modify it under the
7 // terms of the GNU General Public License as published by the
8 // Free Software Foundation; either version 3, or (at your option)
11 // This library is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 // GNU General Public License for more details.
16 // Under Section 7 of GPL version 3, you are granted additional
17 // permissions described in the GCC Runtime Library Exception, version
18 // 3.1, as published by the Free Software Foundation.
20 // You should have received a copy of the GNU General Public License and
21 // a copy of the GCC Runtime Library Exception along with this program;
22 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23 // <http://www.gnu.org/licenses/>.
25 /** @file include/ctgmath
26 * This is a Standard C++ Library header.
28 * @since C++11 (removed in C++20)
31 #ifndef _GLIBCXX_CTGMATH
32 #define _GLIBCXX_CTGMATH 1
34 #ifdef _GLIBCXX_SYSHDR
35 #pragma GCC system_header
38 #if __cplusplus < 201103L
39 # include <bits/c++0x_warning.h>
45 # if __cplusplus >= 202002L && ! _GLIBCXX_USE_DEPRECATED
46 # error "<ctgmath> is not a standard header in C++20, use <complex> or <cmath> instead"
47 # elif __cplusplus >= 201703L && defined __DEPRECATED
48 # pragma GCC diagnostic push
49 # pragma GCC diagnostic ignored "-Wc++23-extensions"
50 # warning "<ctgmath> is deprecated in C++17, use <complex> or <cmath> instead"
51 # pragma GCC diagnostic pop