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https://github.com/mpv-player/mpv.git
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nanahi
9281bccfdf
The feature test macro is nonstandard and not available on older GCC version, which causes build failure despite the compiler does support __builtin_mul_overflow. Since there are no fallback when __builtin_mul_overflow is not available, there is no need to check, so simply remove it. If __builtin_mul_overflow is not supported compilation will still fail just like currently.
95 lines
2.4 KiB
C
95 lines
2.4 KiB
C
#ifndef MPV_COMPILER_H
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#define MPV_COMPILER_H
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#include <assert.h>
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#include <stdio.h>
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#define MP_EXPAND_ARGS(...) __VA_ARGS__
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#if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 202311L
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#include <stdckdint.h>
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#define MP_NORETURN [[noreturn]]
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#define MP_FALLTHROUGH [[fallthrough]]
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#define MP_WARN_UNUSED_RESULT [[nodiscard]]
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#define MP_UNUSED [[maybe_unused]]
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#elif defined(__GNUC__) || defined(__clang__)
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#define MP_NORETURN __attribute__((noreturn))
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#define MP_FALLTHROUGH __attribute__((fallthrough))
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#define MP_WARN_UNUSED_RESULT __attribute__((warn_unused_result))
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#define MP_UNUSED __attribute__((unused))
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#else
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#define MP_NORETURN
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#define MP_FALLTHROUGH do {} while (0)
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#define MP_WARN_UNUSED_RESULT
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#define MP_UNUSED
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#endif
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#if defined(__STDC_VERSION__) && (__STDC_VERSION__ < 202311L) && !defined(thread_local)
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#define thread_local _Thread_local
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#endif
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#ifndef __has_attribute
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#define __has_attribute(x) 0
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#endif
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#ifndef __has_builtin
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#define __has_builtin(x) 0
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#endif
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#if __has_attribute(nonstring)
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#define MP_NONSTRING __attribute__((nonstring))
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#else
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#define MP_NONSTRING
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#endif
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#if __has_attribute(no_sanitize)
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#define MP_NO_ASAN __attribute__((no_sanitize("address")))
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#else
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#define MP_NO_ASAN
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#endif
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#ifndef NDEBUG
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#define MP_ASSERT_UNREACHABLE() (assert(!"unreachable"), abort())
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#elif __has_builtin(__builtin_unreachable)
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#define MP_ASSERT_UNREACHABLE() __builtin_unreachable()
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#elif defined(_MSC_VER)
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#define MP_ASSERT_UNREACHABLE() __assume(0)
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#elif __STDC_VERSION__ >= 202311L
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#include <stddef.h>
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#define MP_ASSERT_UNREACHABLE() unreachable()
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#else
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#define MP_ASSERT_UNREACHABLE() ((void)0)
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#endif
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#ifdef __MINGW_PRINTF_FORMAT
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#define MP_PRINTF_FORMAT __MINGW_PRINTF_FORMAT
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#elif __has_attribute(format)
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#define MP_PRINTF_FORMAT __printf__
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#endif
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#ifdef __MINGW_SCANF_FORMAT
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#define MP_SCANF_FORMAT __MINGW_SCANF_FORMAT
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#elif __has_attribute(format)
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#define MP_SCANF_FORMAT __scanf__
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#endif
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#ifdef MP_PRINTF_FORMAT
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#define MP_PRINTF_ATTRIBUTE(a1, a2) __attribute__((format(MP_PRINTF_FORMAT, a1, a2)))
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#else
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#define MP_PRINTF_ATTRIBUTE(a1, a2)
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#endif
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#ifdef MP_SCANF_FORMAT
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#define MP_SCANF_ATTRIBUTE(a1, a2) __attribute__((format(MP_SCANF_FORMAT, a1, a2)))
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#else
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#define MP_SCANF_ATTRIBUTE(a1, a2)
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#endif
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#if defined(__STDC_VERSION_STDCKDINT_H__) && __STDC_VERSION_STDCKDINT_H__ >= 202311L
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#define MP_CKD_MUL(result, a, b) ckd_mul(result, a, b)
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#else
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#define MP_CKD_MUL(result, a, b) __builtin_mul_overflow(a, b, result)
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#endif
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#endif
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