| 1 | /* Macros for checking required GCC compatibility. Generic version. |
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| 2 | Copyright (C) 2014-2022 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | /* This is the base file. More-specific sysdeps/.../gcc-compat.h files |
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| 20 | can define GCC_COMPAT_VERSION and then #include_next this file. */ |
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| 21 | |
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| 22 | #ifndef _GENERIC_GCC_COMPAT_H |
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| 23 | #define _GENERIC_GCC_COMPAT_H 1 |
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| 24 | |
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| 25 | /* This is the macro that gets used in #if tests in code: true iff |
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| 26 | the library we build must be compatible with user code built by |
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| 27 | GCC version MAJOR.MINOR. */ |
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| 28 | #define GCC_COMPAT(major, minor) \ |
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| 29 | (GCC_COMPAT_VERSION <= GCC_VERSION (major, minor)) |
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| 30 | |
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| 31 | /* This is how we compose an integer from major and minor version |
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| 32 | numbers, for comparison. */ |
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| 33 | #define GCC_VERSION(major, minor) \ |
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| 34 | (((major) << 16) + (minor)) |
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| 35 | |
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| 36 | #ifndef GCC_COMPAT_VERSION |
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| 37 | /* GCC 2.7.2 was current at the time of the glibc-2.0 release. |
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| 38 | We assume nothing before that ever mattered. */ |
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| 39 | # define GCC_COMPAT_VERSION GCC_VERSION (2, 7) |
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| 40 | #endif |
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| 41 | |
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| 42 | #endif |
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| 43 | |
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