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In addition to compiler checks for may_alias support, use __has_attribute as well.

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Andrey Semashev
2017-05-25 12:54:34 +03:00
parent ca151bedb4
commit b7dba02b73
1 changed files with 2 additions and 1 deletions
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3
include/boost/atomic/detail/config.hpp
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@@ -80,7 +80,8 @@
#endif
#endif // defined(BOOST_NO_CXX11_HDR_TYPE_TRAITS)
#if defined(__GNUC__) && (!defined(BOOST_INTEL_CXX_VERSION) || (BOOST_INTEL_CXX_VERSION+0) >= 1300)
#if (defined(__GNUC__) && (!defined(BOOST_INTEL_CXX_VERSION) || (BOOST_INTEL_CXX_VERSION+0) >= 1300)) ||\
(defined(__has_attribute) && (__has_attribute(may_alias)+0) != 0)
#define BOOST_ATOMIC_DETAIL_MAY_ALIAS __attribute__((__may_alias__))
#define BOOST_ATOMIC_DETAIL_STORAGE_MAY_ALIAS
#elif defined(BOOST_MSVC)