175 lines
4.5 KiB
C
175 lines
4.5 KiB
C
/*
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* Copyright (C) 2003-2014 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef COMPILER_H
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#define COMPILER_H
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#define GCC_CHECK_VERSION(major, minor) \
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(defined(__GNUC__) && \
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(__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))))
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#ifdef __GNUC__
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#define GCC_VERSION (__GNUC__ * 10000 \
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+ __GNUC_MINOR__ * 100 \
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+ __GNUC_PATCHLEVEL__)
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#else
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#define GCC_VERSION 0
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#endif
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#ifdef __clang__
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# define CLANG_VERSION (__clang_major__ * 10000 \
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+ __clang_minor__ * 100 \
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+ __clang_patchlevel__)
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# if __clang_major__ < 3
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# error Sorry, your clang version is too old. You need at least version 3.1.
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# endif
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#elif defined(__GNUC__)
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# if !GCC_CHECK_VERSION(4,6)
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# error Sorry, your gcc version is too old. You need at least version 4.6.
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# endif
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#else
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# warning Untested compiler. Use at your own risk!
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#endif
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#if GCC_CHECK_VERSION(4,0)
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/* GCC 4.x */
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#define gcc_const __attribute__((const))
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#define gcc_deprecated __attribute__((deprecated))
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#define gcc_may_alias __attribute__((may_alias))
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#define gcc_malloc __attribute__((malloc))
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#define gcc_noreturn __attribute__((noreturn))
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#define gcc_packed __attribute__((packed))
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#define gcc_printf(a,b) __attribute__((format(printf, a, b)))
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#define gcc_pure __attribute__((pure))
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#define gcc_sentinel __attribute__((sentinel))
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#define gcc_unused __attribute__((unused))
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#define gcc_warn_unused_result __attribute__((warn_unused_result))
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#define gcc_nonnull(...) __attribute__((nonnull(__VA_ARGS__)))
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#define gcc_nonnull_all __attribute__((nonnull))
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#define gcc_likely(x) __builtin_expect (!!(x), 1)
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#define gcc_unlikely(x) __builtin_expect (!!(x), 0)
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#define gcc_aligned(n) __attribute__((aligned(n)))
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#define gcc_visibility_hidden __attribute__((visibility("hidden")))
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#define gcc_visibility_default __attribute__((visibility("default")))
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#define gcc_always_inline __attribute__((always_inline))
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#else
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/* generic C compiler */
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#define gcc_const
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#define gcc_deprecated
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#define gcc_may_alias
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#define gcc_malloc
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#define gcc_noreturn
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#define gcc_packed
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#define gcc_printf(a,b)
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#define gcc_pure
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#define gcc_sentinel
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#define gcc_unused
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#define gcc_warn_unused_result
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#define gcc_nonnull(...)
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#define gcc_nonnull_all
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#define gcc_likely(x) (x)
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#define gcc_unlikely(x) (x)
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#define gcc_aligned(n)
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#define gcc_visibility_hidden
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#define gcc_visibility_default
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#define gcc_always_inline inline
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#endif
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#if GCC_CHECK_VERSION(4,3)
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#define gcc_hot __attribute__((hot))
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#define gcc_cold __attribute__((cold))
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#else /* ! GCC_UNUSED >= 40300 */
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#define gcc_hot
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#define gcc_cold
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#endif /* ! GCC_UNUSED >= 40300 */
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#if GCC_CHECK_VERSION(4,6) && !defined(__clang__)
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#define gcc_flatten __attribute__((flatten))
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#else
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#define gcc_flatten
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#endif
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#ifndef __cplusplus
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/* plain C99 has "restrict" */
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#define gcc_restrict restrict
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#elif GCC_CHECK_VERSION(4,0)
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/* "__restrict__" is a GCC extension for C++ */
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#define gcc_restrict __restrict__
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#else
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/* disable it on other compilers */
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#define gcc_restrict
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#endif
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/* C++11 features */
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#if defined(__cplusplus)
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/* support for C++11 "override" was added in gcc 4.7 */
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#if !defined(__clang__) && !GCC_CHECK_VERSION(4,7)
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#define override
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#define final
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#endif
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#if defined(__clang__) || GCC_CHECK_VERSION(4,8)
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#define gcc_alignas(T, fallback) alignas(T)
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#else
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#define gcc_alignas(T, fallback) gcc_aligned(fallback)
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#endif
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#endif
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#ifndef __has_feature
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// define dummy macro for non-clang compilers
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#define __has_feature(x) 0
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#endif
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#if __has_feature(attribute_unused_on_fields)
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#define gcc_unused_field gcc_unused
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#else
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#define gcc_unused_field
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#endif
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#if defined(__GNUC__) || defined(__clang__)
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#define gcc_unreachable() __builtin_unreachable()
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#else
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#define gcc_unreachable()
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#endif
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#endif
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