// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#ifndef _LIBCPP___VERBOSE_ABORT
#define _LIBCPP___VERBOSE_ABORT

#include <__availability>
#include <__config>

#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
#  pragma GCC system_header
#endif

// Provide a default implementation of __libcpp_verbose_abort if we know that neither the built
// library nor the user is providing one. Otherwise, just declare it and use the one from the
// built library or the one provided by the user.
//
// We can't provide a great implementation because it needs to be pretty much
// dependency-free (this is included everywhere else in the library).
#if defined(_LIBCPP_HAS_NO_VERBOSE_ABORT_IN_LIBRARY) && !defined(_LIBCPP_AVAILABILITY_CUSTOM_VERBOSE_ABORT_PROVIDED)

extern "C" void abort();

_LIBCPP_BEGIN_NAMESPACE_STD

_LIBCPP_NORETURN _LIBCPP_ATTRIBUTE_FORMAT(__printf__, 1, 2) _LIBCPP_HIDE_FROM_ABI inline
void __libcpp_verbose_abort(const char *, ...) {
  ::abort();
  __builtin_unreachable(); // never reached, but needed to tell the compiler that the function never returns
}

_LIBCPP_END_NAMESPACE_STD

#else

_LIBCPP_BEGIN_NAMESPACE_STD

_LIBCPP_NORETURN _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_ATTRIBUTE_FORMAT(__printf__, 1, 2)
void __libcpp_verbose_abort(const char *__format, ...);

_LIBCPP_END_NAMESPACE_STD

#endif

#endif // _LIBCPP___VERBOSE_ABORT
