如何静默内部升压已弃用的消息

Question

我正在将代码从 boost 1.67 移植到 boost 1.74 (debian buster->bullseye)。

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当我编译时我得到：

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In file included from /usr/include/boost/config/header_deprecated.hpp:18,\n                 from /usr/include/boost/detail/no_exceptions_support.hpp:15,\n                 from /usr/include/boost/msm/back/state_machine.hpp:20,\n                 from /home/stew/mycode.cpp:3:\n/usr/include/boost/detail/no_exceptions_support.hpp:17:1: note: \xe2\x80\x98#pragma message: This header is deprecated. Use <boost/core/no_exceptions_support.hpp> instead.\xe2\x80\x99\n   17 | BOOST_HEADER_DEPRECATED("<boost/core/no_exceptions_support.hpp>")\n      | ^~~~~~~~~~~~~~~~~~~~~~~\n/usr/include/boost/bind.hpp:36:1: note: \xe2\x80\x98#pragma message: The practice of declaring the Bind placeholders (_1, _2, ...) in the global namespace is deprecated. Please use <boost/bind/bind.hpp> + using namespace boost::placeholders, or define BOOST_BIND_GLOBAL_PLACEHOLDERS to retain the current behavior.\xe2\x80\x99\n   36 | BOOST_PRAGMA_MESSAGE(\n      | ^~~~~~~~~~~~~~~~~~~~\n

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我知道标头已被弃用。我很高兴改变

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#include <boost/bind.hpp>                         -> #include <boost/bind/bind.hpp>\n#include <boost/detail/no_exceptions_support.hpp> -> #include <boost/core/no_exceptions_support.hpp>\n

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然而问题不在我的代码中。在里面<boost/msm/back/state_machine.hpp>。对于包含任何这些标头的每个实例，我都会收到类似以下错误：

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In file included from /usr/include/boost/bind.hpp:30,\n                 from /usr/include/boost/property_tree/json_parser/detail/parser.hpp:7,\n                 from /usr/include/boost/property_tree/json_parser/detail/read.hpp:13,\n                 from /usr/include/boost/property_tree/json_parser.hpp:16:\n/usr/include/boost/bind.hpp:36:1: note: \xe2\x80\x98#pragma message: The practice of declaring the Bind placeholders (_1, _2, ...) in the global namespace is deprecated. Please use <boost/bind/bind.hpp> + using namespace boost::placeholders, or define BOOST_BIND_GLOBAL_PLACEHOLDERS to retain the current behavior.\xe2\x80\x99\n   36 | BOOST_PRAGMA_MESSAGE(\n      | ^~~~~~~~~~~~~~~~~~~~\n\n\nIn file included from /usr/include/boost/math/tools/cxx03_warn.hpp:9,\n                 from /usr/include/boost/math/constants/constants.hpp:11:\n/usr/include/boost/bind.hpp:36:1: note: \xe2\x80\x98#pragma message: The practice of declaring the Bind placeholders (_1, _2, ...) in the global namespace is deprecated. Please use <boost/bind/bind.hpp> + using namespace boost::placeholders, or define BOOST_BIND_GLOBAL_PLACEHOLDERS to retain the current behavior.\xe2\x80\x99\n   36 | BOOST_PRAGMA_MESSAGE(\n      | ^~~~~~~~~~~~~~~~~~~~\n\n\nIn file included from /usr/include/boost/smart_ptr/detail/sp_thread_sleep.hpp:22,\n                 from /usr/include/boost/smart_ptr/detail/yield_k.hpp:23,\n                 from /usr/include/boost/smart_ptr/detail/spinlock_gcc_atomic.hpp:14,\n                 from /usr/include/boost/smart_ptr/detail/spinlock.hpp:42,\n                 from /usr/include/boost/smart_ptr/detail/spinlock_pool.hpp:25,\n                 from /usr/include/boost/smart_ptr/shared_ptr.hpp:29,\n                 from /usr/include/boost/shared_ptr.hpp:17,\n                 from /usr/include/boost/date_time/time_clock.hpp:17,\n                 from /usr/include/boost/date_time/posix_time/posix_time_types.hpp:10,\n                 from /usr/include/boost/asio/time_traits.hpp:23,\n                 from /usr/include/boost/asio/detail/timer_queue_ptime.hpp:22,\n                 from /usr/include/boost/asio/detail/deadline_timer_service.hpp:29,\n                 from /usr/include/boost/asio/basic_deadline_timer.hpp:25,\n                 from /usr/include/boost/asio.hpp:25:\n/usr/include/boost/bind.hpp:36:1: note: \xe2\x80\x98#pragma message: The practice of declaring the Bind placeholders (_1, _2, ...) in the global namespace is deprecated. Please use <boost/bind/bind.hpp> + using namespace boost::placeholders, or define BOOST_BIND_GLOBAL_PLACEHOLDERS to retain the current behavior.\xe2\x80\x99\n   36 | BOOST_PRAGMA_MESSAGE(\n      | ^~~~~~~~~~~~~~~~~~~~\n\n

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有没有办法在不修补 boost 本身的情况下消除 boost 的内部警告？

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我知道我可以避免-DBOOST_BIND_GLOBAL_PLACEHOLDERS警告bind，但是问题又如何呢detail/no_exceptions_support.hpp？

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Answer 1

看看吧

boost/config/header_deprecated.hpp：

#ifndef BOOST_CONFIG_HEADER_DEPRECATED_HPP_INCLUDED
#define BOOST_CONFIG_HEADER_DEPRECATED_HPP_INCLUDED

//  Copyright 2017 Peter Dimov.
//
//  Distributed under the Boost Software License, Version 1.0.
//
//  See accompanying file LICENSE_1_0.txt or copy at
//  http://www.boost.org/LICENSE_1_0.txt
//
//  BOOST_HEADER_DEPRECATED("<alternative>")
//
//  Expands to the equivalent of
//    BOOST_PRAGMA_MESSAGE("This header is deprecated. Use <alternative> instead.")
//
//  Note that this header is C compatible.

#include <boost/config/pragma_message.hpp>

#if defined(BOOST_ALLOW_DEPRECATED_HEADERS)
# define BOOST_HEADER_DEPRECATED(a)
#else
# define BOOST_HEADER_DEPRECATED(a) BOOST_PRAGMA_MESSAGE("This header is deprecated. Use " a " instead.")
#endif

#endif // BOOST_CONFIG_HEADER_DEPRECATED_HPP_INCLUDED

因此，将 -DBOOST_ALLOW_DEPRECATED_HEADERS 添加到编译标志中，并且不应再显示 boost 弃用警告。

我在我的 CMakeLists.txt 文件中执行此操作：

  # ignore BOOST deprecated headers
  add_definitions("-DBOOST_ALLOW_DEPRECATED_HEADERS")
  add_definitions("-DBOOST_BIND_GLOBAL_PLACEHOLDERS")

我的构建日志现在噪音少了很多（在我的例子中是 Ubuntu 22.04）

再见冈瑟