Access violation on static initialization

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This is the answer of Microsoft as posted to my bug report at Microsoft Connect:

Windows Server 2003 and Windows XP have problems with dynamically loading a DLL (via LoadLibrary) that uses thread-local storage, which is what thread-safe statics use internally to provide efficient execution when the static local has already been initialized. As these systems are out of support, it is extremely unlikely for a patch to be created for those systems to add this support as is present in Vista and newer OSes, and we are reluctant to penalize the performance on in-support OSes to provide this functionality to the old out-of-support ones.

To work around the issue you can use /Zc:threadSafeInit- to disable the thread-safe initialization code and this will avoid the thread-local variable. Of course by doing so the initialization code reverts back to the VS2013 mode and is not thread-safe, so this option is only viable if you don’t rely on the thread-safety of local statics.

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