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// file : butl/ft/lang -*- C++ -*-
// copyright : Copyright (c) 2014-2017 Code Synthesis Ltd
// license : MIT; see accompanying LICENSE file
#ifndef BUTL_FT_LANG
#define BUTL_FT_LANG
// __cpp_thread_local (extension)
//
// If this macro is undefined then one may choose to fallback to __thread.
// Note, however, that it only for values that do not require dynamic
// (runtime) initialization.
//
#ifndef __cpp_thread_local
//
// Apparently Apple's Clang "temporarily disabled" C++11 thread_local until
// they can implement a "fast" version, which reportedly happened in XCode
// 8.
//
# if defined(__apple_build_version__)
# if __apple_build_version__ >= 8000000
# define __cpp_thread_local 201103
# endif
# else
# define __cpp_thread_local 201103
# endif
#endif
#endif // BUTL_FT_LANG
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