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