[lldb-dev] Win64 lldb build broken, llvm::call_once and _mm_mfence

[Kamil Rytarowski via lldb-dev]

On 08.02.2017 22:14, Kamil Rytarowski wrote:
> // std::call_once from libc++ is used on all Unix platforms. Other
> // implementations like libstdc++ are known to have problems on NetBSD,
> // OpenBSD and PowerPC.
> #if defined(LLVM_ON_UNIX) && (defined(_LIBCPP_VERSION) ||
>       \
>     !(defined(__NetBSD__) || defined(__OpenBSD__) || defined(__ppc__)))
> #define LLVM_THREADING_USE_STD_CALL_ONCE 1
> #else
> #define LLVM_THREADING_USE_STD_CALL_ONCE 0
> #endif
> 
> This check defined(LLVM_ON_UNIX) looks wrong it assumes that Windows
> needs call_once walkaround.
> 

Ah not, it's OK.

If the file is windows-only it can be switched back to std:: version.

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