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Diffstat (limited to 'src/Compiler.h')
| -rw-r--r-- | src/Compiler.h | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/src/Compiler.h b/src/Compiler.h new file mode 100644 index 000000000..94abdcff3 --- /dev/null +++ b/src/Compiler.h @@ -0,0 +1,174 @@ +/* + * Copyright (C) 2003-2013 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef COMPILER_H +#define COMPILER_H + +#define GCC_CHECK_VERSION(major, minor) \ + (defined(__GNUC__) && \ + (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))) + +#ifdef __GNUC__ +#define GCC_VERSION (__GNUC__ * 10000 \ + + __GNUC_MINOR__ * 100 \ + + __GNUC_PATCHLEVEL__) +#else +#define GCC_VERSION 0 +#endif + +#ifdef __clang__ +# define CLANG_VERSION (__clang_major__ * 10000 \ + + __clang_minor__ * 100 \ + + __clang_patchlevel__) +# if __clang_major__ < 3 +# error Sorry, your clang version is too old. You need at least version 3.1. +# endif +#elif defined(__GNUC__) +# if !GCC_CHECK_VERSION(4,6) +# error Sorry, your gcc version is too old. You need at least version 4.6. +# endif +#else +# warning Untested compiler. Use at your own risk! +#endif + +#if GCC_CHECK_VERSION(4,0) + +/* GCC 4.x */ + +#define gcc_const __attribute__((const)) +#define gcc_deprecated __attribute__((deprecated)) +#define gcc_may_alias __attribute__((may_alias)) +#define gcc_malloc __attribute__((malloc)) +#define gcc_noreturn __attribute__((noreturn)) +#define gcc_packed __attribute__((packed)) +#define gcc_printf(a,b) __attribute__((format(printf, a, b))) +#define gcc_pure __attribute__((pure)) +#define gcc_sentinel __attribute__((sentinel)) +#define gcc_unused __attribute__((unused)) +#define gcc_warn_unused_result __attribute__((warn_unused_result)) + +#define gcc_nonnull(...) __attribute__((nonnull(__VA_ARGS__))) +#define gcc_nonnull_all __attribute__((nonnull)) + +#define gcc_likely(x) __builtin_expect (!!(x), 1) +#define gcc_unlikely(x) __builtin_expect (!!(x), 0) + +#define gcc_aligned(n) __attribute__((aligned(n))) + +#define gcc_visibility_hidden __attribute__((visibility("hidden"))) +#define gcc_visibility_default __attribute__((visibility("default"))) + +#define gcc_always_inline __attribute__((always_inline)) + +#else + +/* generic C compiler */ + +#define gcc_const +#define gcc_deprecated +#define gcc_may_alias +#define gcc_malloc +#define gcc_noreturn +#define gcc_packed +#define gcc_printf(a,b) +#define gcc_pure +#define gcc_sentinel +#define gcc_unused +#define gcc_warn_unused_result + +#define gcc_nonnull(...) +#define gcc_nonnull_all + +#define gcc_likely(x) (x) +#define gcc_unlikely(x) (x) + +#define gcc_aligned(n) + +#define gcc_visibility_hidden +#define gcc_visibility_default + +#define gcc_always_inline inline + +#endif + +#if GCC_CHECK_VERSION(4,3) + +#define gcc_hot __attribute__((hot)) +#define gcc_cold __attribute__((cold)) + +#else /* ! GCC_UNUSED >= 40300 */ + +#define gcc_hot +#define gcc_cold + +#endif /* ! GCC_UNUSED >= 40300 */ + +#if GCC_CHECK_VERSION(4,6) && !defined(__clang__) +#define gcc_flatten __attribute__((flatten)) +#else +#define gcc_flatten +#endif + +#ifndef __cplusplus +/* plain C99 has "restrict" */ +#define gcc_restrict restrict +#elif GCC_CHECK_VERSION(4,0) +/* "__restrict__" is a GCC extension for C++ */ +#define gcc_restrict __restrict__ +#else +/* disable it on other compilers */ +#define gcc_restrict +#endif + +/* C++11 features */ + +#if defined(__cplusplus) + +/* support for C++11 "override" was added in gcc 4.7 */ +#if !defined(__clang__) && !GCC_CHECK_VERSION(4,7) +#define override +#define final +#endif + +#if defined(__clang__) || GCC_CHECK_VERSION(4,8) +#define gcc_alignas(T, fallback) alignas(T) +#else +#define gcc_alignas(T, fallback) gcc_aligned(fallback) +#endif + +#endif + +#ifndef __has_feature + // define dummy macro for non-clang compilers + #define __has_feature(x) 0 +#endif + +#if __has_feature(attribute_unused_on_fields) +#define gcc_unused_field gcc_unused +#else +#define gcc_unused_field +#endif + +#if defined(__GNUC__) || defined(__clang__) +#define gcc_unreachable() __builtin_unreachable() +#else +#define gcc_unreachable() +#endif + +#endif |