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bc2ba20a | 1 | /* Macros for checking required GCC compatibility. Generic version. |
dff8da6b | 2 | Copyright (C) 2014-2024 Free Software Foundation, Inc. |
bc2ba20a RM |
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 | |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
bc2ba20a RM |
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 |