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#include <iostream>
// This file displays the value of `__cplusplus` on `stderr`, and then
// return 0 if and only if C++ `thread_local` feature can be used.
// The tests are the same as for the definition of
// `CGAL_CAN_USE_CXX11_THREAD_LOCAL` in `<CGAL/config.h>`.
#ifndef __has_feature
#define __has_feature(x) 0 // Compatibility with non-clang compilers.
#endif
int main() {
#if ! defined(__cplusplus)
std::cout << "Undefined";
return 1;
#else
std::cout << __cplusplus;
#endif
#if __has_feature(cxx_thread_local) || \
( __GNUC__ > 0 && __cplusplus >= 201103L )
return 0;
#else
return 1;
#endif
}
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