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Added a workaround for older gcc and clang with broken std::alignment_of.

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gcc older than 8.1 and clang older than 8.0 produce incorrect results of
std::alignment_of for 64-bit types on 32-bit x86. Use boost::alignment_of,
which contains workarounds for these compilers.
This commit is contained in:
Andrey Semashev
2020-03-01 16:48:08 +03:00
parent ce80ca0ce8
commit 91b7d325e0
1 changed files with 11 additions and 2 deletions
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13
include/boost/atomic/detail/type_traits/alignment_of.hpp
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@@ -15,7 +15,16 @@
#define BOOST_ATOMIC_DETAIL_TYPE_TRAITS_ALIGNMENT_OF_HPP_INCLUDED_
#include <boost/atomic/detail/config.hpp>
#if !defined(BOOST_ATOMIC_DETAIL_NO_CXX11_BASIC_HDR_TYPE_TRAITS)
#if defined(BOOST_ATOMIC_DETAIL_NO_CXX11_BASIC_HDR_TYPE_TRAITS) ||\
(defined(BOOST_GCC) && (BOOST_GCC+0) < 80100) ||\
(defined(BOOST_CLANG) && !defined(__apple_build_version__) && (__clang_major__+0) < 8) ||\
(defined(BOOST_CLANG) && defined(__apple_build_version__) && (__clang_major__+0) < 9)
// For some compilers std::alignment_of gives the wrong result for 64-bit types on 32-bit targets
#define BOOST_ATOMIC_DETAIL_NO_CXX11_STD_ALIGNMENT_OF
#endif
#if !defined(BOOST_ATOMIC_DETAIL_NO_CXX11_STD_ALIGNMENT_OF)
#include <type_traits>
#else
#include <boost/type_traits/alignment_of.hpp>
@@ -29,7 +38,7 @@ namespace boost {
namespace atomics {
namespace detail {
#if !defined(BOOST_ATOMIC_DETAIL_NO_CXX11_BASIC_HDR_TYPE_TRAITS)
#if !defined(BOOST_ATOMIC_DETAIL_NO_CXX11_STD_ALIGNMENT_OF)
using std::alignment_of;
#else
using boost::alignment_of;