I'm porting my code from boost 1.67 to boost 1.74 (debian buster->bullseye).
When I compile I get:
In file included from /usr/include/boost/config/header_deprecated.hpp:18,
from /usr/include/boost/detail/no_exceptions_support.hpp:15,
from /usr/include/boost/msm/back/state_machine.hpp:20,
from /home/stew/mycode.cpp:3:
/usr/include/boost/detail/no_exceptions_support.hpp:17:1: note: ‘#pragma message: This header is deprecated. Use <boost/core/no_exceptions_support.hpp> instead.’
17 | BOOST_HEADER_DEPRECATED("<boost/core/no_exceptions_support.hpp>")
| ^~~~~~~~~~~~~~~~~~~~~~~
/usr/include/boost/bind.hpp:36:1: note: ‘#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.’
36 | BOOST_PRAGMA_MESSAGE(
| ^~~~~~~~~~~~~~~~~~~~
I get that headers get deprecated. I'm happy to change
#include <boost/bind.hpp> -> #include <boost/bind/bind.hpp>
#include <boost/detail/no_exceptions_support.hpp> -> #include <boost/core/no_exceptions_support.hpp>
However the problem isn't in my code. It's in <boost/msm/back/state_machine.hpp>. I'm getting errors like these for each instance of including any of these headers:
In file included from /usr/include/boost/bind.hpp:30,
from /usr/include/boost/property_tree/json_parser/detail/parser.hpp:7,
from /usr/include/boost/property_tree/json_parser/detail/read.hpp:13,
from /usr/include/boost/property_tree/json_parser.hpp:16:
/usr/include/boost/bind.hpp:36:1: note: ‘#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.’
36 | BOOST_PRAGMA_MESSAGE(
| ^~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/boost/math/tools/cxx03_warn.hpp:9,
from /usr/include/boost/math/constants/constants.hpp:11:
/usr/include/boost/bind.hpp:36:1: note: ‘#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.’
36 | BOOST_PRAGMA_MESSAGE(
| ^~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/boost/smart_ptr/detail/sp_thread_sleep.hpp:22,
from /usr/include/boost/smart_ptr/detail/yield_k.hpp:23,
from /usr/include/boost/smart_ptr/detail/spinlock_gcc_atomic.hpp:14,
from /usr/include/boost/smart_ptr/detail/spinlock.hpp:42,
from /usr/include/boost/smart_ptr/detail/spinlock_pool.hpp:25,
from /usr/include/boost/smart_ptr/shared_ptr.hpp:29,
from /usr/include/boost/shared_ptr.hpp:17,
from /usr/include/boost/date_time/time_clock.hpp:17,
from /usr/include/boost/date_time/posix_time/posix_time_types.hpp:10,
from /usr/include/boost/asio/time_traits.hpp:23,
from /usr/include/boost/asio/detail/timer_queue_ptime.hpp:22,
from /usr/include/boost/asio/detail/deadline_timer_service.hpp:29,
from /usr/include/boost/asio/basic_deadline_timer.hpp:25,
from /usr/include/boost/asio.hpp:25:
/usr/include/boost/bind.hpp:36:1: note: ‘#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.’
36 | BOOST_PRAGMA_MESSAGE(
| ^~~~~~~~~~~~~~~~~~~~
Is there a way to silence boost's internal warnings without patching boost itself?
I know I can -DBOOST_BIND_GLOBAL_PLACEHOLDERS to avoid the bind warning, but what about the detail/no_exceptions_support.hpp issue?
Just have a look at
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
So add -DBOOST_ALLOW_DEPRECATED_HEADERS to your compile flags and the boost deprecation warnings should no longer be shown.
I am doing this in my CMakeLists.txt file:
# ignore BOOST deprecated headers
add_definitions("-DBOOST_ALLOW_DEPRECATED_HEADERS")
add_definitions("-DBOOST_BIND_GLOBAL_PLACEHOLDERS")
And my build log is a lot less noisy now (Ubuntu 22.04 in my case)
Bye Gunther