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Disable constinit for MSVC compilers

Browse Source 
https://developercommunity.visualstudio.com/t/C:-constinit-for-an-optional-fails-if-/1406069
does not only affect constinit thread_local but also constinit in
general on MSVC compilers when C++20 is being used. So disable the
feature for these compilers in general for now.

This commit amends d9531593a2

Fixes: QTBUG-105234
Pick-to: 6.4
Change-Id: I1855f0857d85487895460fc7c56675fb864bfa73
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
This commit is contained in:
Oliver Wolff 2022-07-27 10:20:39 +02:00 committed by Thiago Macieira
parent 870cfa4e17
commit 51acd47082
3 changed files with 5 additions and 8 deletions
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9
src/corelib/global/qglobal.h
View File

@ -895,10 +895,11 @@ constexpr std::underlying_type_t<Enum> qToUnderlying(Enum e) noexcept
#endif
#ifdef __cpp_constinit
# define Q_CONSTINIT constinit
# if defined(Q_CC_MSVC) && !defined(Q_CC_CLANG)
// https://developercommunity.visualstudio.com/t/C:-constinit-for-an-optional-fails-if-/1406069
# define Q_THREAD_LOCAL_CONSTINIT
# define Q_CONSTINIT
# else
# define Q_CONSTINIT constinit
# endif
#elif defined(__has_cpp_attribute) && __has_cpp_attribute(clang::require_constant_initialization)
# define Q_CONSTINIT [[clang::require_constant_initialization]]
@ -908,10 +909,6 @@ constexpr std::underlying_type_t<Enum> qToUnderlying(Enum e) noexcept
# define Q_CONSTINIT
#endif
#ifndef Q_THREAD_LOCAL_CONSTINIT
# define Q_THREAD_LOCAL_CONSTINIT Q_CONSTINIT
#endif
template <typename T> inline T *qGetPtrHelper(T *ptr) noexcept { return ptr; }
template <typename Ptr> inline auto qGetPtrHelper(Ptr &ptr) noexcept -> decltype(ptr.get())
{ static_assert(noexcept(ptr.get()), "Smart d pointers for Q_DECLARE_PRIVATE must have noexcept get()"); return ptr.get(); }

2
src/corelib/kernel/qobject.cpp
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@ -2415,7 +2415,7 @@ public:
{ return std::find(locations.begin(), locations.end(), method) != locations.end(); }
};
Q_THREAD_LOCAL_CONSTINIT static thread_local FlaggedDebugSignatures flaggedSignatures = {};
Q_CONSTINIT static thread_local FlaggedDebugSignatures flaggedSignatures = {};
} // unnamed namespace
const char *qFlagLocation(const char *method)

2
src/corelib/kernel/qproperty.cpp
View File

@ -164,7 +164,7 @@ struct QPropertyDelayedNotifications
}
};
Q_THREAD_LOCAL_CONSTINIT static thread_local QBindingStatus bindingStatus;
Q_CONSTINIT static thread_local QBindingStatus bindingStatus;
/*!
\since 6.2