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IN C23, thread_local is a reserved keyword and we shall therefore do nothing to redefine it. glibc has it defined for older standard version with the right conditions. v2 by Yu Watanabe: Move the definition to missing_threads.h like the way we define e.g. missing syscalls or missing definitions, and include it by the users. Co-authored-by: Yu Watanabe <watanabe.yu+github@gmail.com>
16 lines
602 B
C
16 lines
602 B
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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#pragma once
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/* If threads.h doesn't exist, then define our own thread_local to match C11's thread_local. */
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#if HAVE_THREADS_H
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# include <threads.h>
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#elif !(defined(thread_local))
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/* Don't break on glibc < 2.16 that doesn't define __STDC_NO_THREADS__
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* see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53769 */
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# if __STDC_VERSION__ >= 201112L && !(defined(__STDC_NO_THREADS__) || (defined(__GNU_LIBRARY__) && __GLIBC__ == 2 && __GLIBC_MINOR__ < 16))
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# define thread_local _Thread_local
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# else
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# define thread_local __thread
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# endif
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#endif
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