features.h

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/*
 * Copyright (C) 2022 Gunar Schorcht
 *
 * This file is subject to the terms and conditions of the GNU Lesser
 * General Public License v2.1. See the file LICENSE in the top level
 * directory for more details.
 */
 
#pragma once

 
#ifndef DOXYGEN
 
#ifdef __cplusplus
extern "C" {
#endif
 
#include_next <sys/features.h>
 
/*
 * When using a GCC version with POSIX thread support enabled, as is the
 * case with Espressif's precompiled toolchains, the `_POSIX_THREAD`
 * definition has to be reverted to prevent the inclusion of newlib's
 * POXIS header files in system headers to avoid compilation errors.
 * The reason is that RIOT uses its own `pthread` implementation, but
 * its type declarations are not fully compatible with those in
 * `sys/_pthreadtypes.h`.
 */
#undef _POSIX_THREADS
 
/*
 * To avoid type conflicts between the `pthread_rwlockattr_t` definition
 * in RIOT's `pthread` implementation and newlibc's `sys/_pthreadtypes.h`,
 * the macro `_POSIX_READER_WRITER_LOCKS` must be undefined.
 */
#undef _POSIX_READER_WRITER_LOCKS
 
#ifdef __cplusplus
}
#endif
 
#endif /* DOXYGEN */