1 | /* Macros for checking required GCC compatibility. Generic version. |
2 | Copyright (C) 2014-2022 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. |
4 | |
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. |
9 | |
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. |
14 | |
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 | <https://www.gnu.org/licenses/>. */ |
18 | |
19 | /* This is the base file. More-specific sysdeps/.../gcc-compat.h files |
20 | can define GCC_COMPAT_VERSION and then #include_next this file. */ |
21 | |
22 | #ifndef _GENERIC_GCC_COMPAT_H |
23 | #define _GENERIC_GCC_COMPAT_H 1 |
24 | |
25 | /* This is the macro that gets used in #if tests in code: true iff |
26 | the library we build must be compatible with user code built by |
27 | GCC version MAJOR.MINOR. */ |
28 | #define GCC_COMPAT(major, minor) \ |
29 | (GCC_COMPAT_VERSION <= GCC_VERSION (major, minor)) |
30 | |
31 | /* This is how we compose an integer from major and minor version |
32 | numbers, for comparison. */ |
33 | #define GCC_VERSION(major, minor) \ |
34 | (((major) << 16) + (minor)) |
35 | |
36 | #ifndef GCC_COMPAT_VERSION |
37 | /* GCC 2.7.2 was current at the time of the glibc-2.0 release. |
38 | We assume nothing before that ever mattered. */ |
39 | # define GCC_COMPAT_VERSION GCC_VERSION (2, 7) |
40 | #endif |
41 | |
42 | #endif |
43 | |