krytarowski added a comment.
In https://reviews.llvm.org/D29288#660636, @clayborg wrote:
> Be very careful when using this, you can't change member variables that used
> to be std::once to be statics. We also don't need the llvm namespace to be
> included with "using namespace llvm;" in many of the files.
`using namespace llvm;` is currently required in order to get this functional:
enum InitStatus { Uninitialized = 0, Wait = 1, Done = 2 };
typedef volatile sys::cas_flag once_flag;
/// This macro is the only way you should define your once flag for LLVM's
/// call_once.
#define LLVM_DEFINE_ONCE_FLAG(flag) static once_flag flag = Uninitialized
`sys::cas_flag` is a member of the `llvm` namespace.
Repository:
rL LLVM
https://reviews.llvm.org/D29288
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