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| author | Azat Khuzhin <a3at.mail@gmail.com> | 2017-01-30 01:58:22 +0300 |
|---|---|---|
| committer | Azat Khuzhin <a3at.mail@gmail.com> | 2017-01-30 11:50:02 +0300 |
| commit | ffbce578c40a06491ce6585ab2d82ebb69a52d30 (patch) | |
| tree | 08148cc23c20ba7335dc61efa37b92377972488f /util-internal.h | |
| parent | d057c45e8f48aa90d8b340cac4c8ae4cc8b5d0ac (diff) | |
| download | libevent-ffbce578c40a06491ce6585ab2d82ebb69a52d30.tar.gz | |
Fix clang 3 (some versions) misbehaviour for __has_attribute()
Refs: #447
Clang: https://reviews.llvm.org/rL223468 ("Modify __has_attribute so
that it only looks for GNU-style attributes")
Diffstat (limited to 'util-internal.h')
| -rw-r--r-- | util-internal.h | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/util-internal.h b/util-internal.h index 54e9fa30..77e17ab0 100644 --- a/util-internal.h +++ b/util-internal.h @@ -50,8 +50,18 @@ extern "C" { #endif -#if !defined(__has_attribute) -#define __has_attribute(x) 0 +/* __has_attribute() wrapper */ +#ifdef __has_attribute +#define EVUTIL_HAS_ATTRIBUTE __has_attribute +#endif +/** clang 3 __has_attribute misbehaves in some versions */ +#if defined(__clang__) && \ + __clang__ == 1 && __clang_major__ == 3 && \ + (__clang_minor__ >= 2 && __clang_minor__ <= 5) +#undef EVUTIL_HAS_ATTRIBUTE +#endif +#ifndef EVUTIL_HAS_ATTRIBUTE +#define EVUTIL_HAS_ATTRIBUTE(x) 0 #endif /* If we need magic to say "inline", get it for free internally. */ @@ -312,7 +322,7 @@ ev_int32_t evutil_weakrand_range_(struct evutil_weakrand_state *seed, ev_int32_t #define EVUTIL_UNLIKELY(p) (p) #endif -#if __has_attribute(fallthrough) +#if EVUTIL_HAS_ATTRIBUTE(fallthrough) #define EVUTIL_FALLTHROUGH __attribute__((fallthrough)) #else #define EVUTIL_FALLTHROUGH /* fallthrough */ |