7

我一直在使用 Boost 开发一个 C++ 项目，并且在编译之间，我必须在 boost 中升级了一些东西，而没有任何意义，因为现在 Boost 依赖项将无法编译：

In file included from /usr/include/boost/thread/pthread/mutex.hpp:14:0,
                 from /usr/include/boost/thread/mutex.hpp:16,
                 from /usr/include/boost/thread/pthread/thread_data.hpp:12,
                 from /usr/include/boost/thread/thread.hpp:17,
                 from /usr/include/boost/thread.hpp:13,
                 from /blah.h:4,
                 from bluh.h:3,
                 from bleh/main.cpp:4:
/usr/include/boost/thread/xtime.hpp:23:5: error: expected identifier before numeric constant
/usr/include/boost/thread/xtime.hpp:23:5: error: expected '}' before numeric constant
/usr/include/boost/thread/xtime.hpp:23:5: error: expected unqualified-id before numeric constant
/usr/include/boost/thread/xtime.hpp:46:14: error: expected type-specifier before 'system_time'
In file included from /usr/include/boost/thread/pthread/mutex.hpp:14:0,
                 from /usr/include/boost/thread/mutex.hpp:16,
                 from /usr/include/boost/thread/pthread/thread_data.hpp:12,
                 from /usr/include/boost/thread/thread.hpp:17,
                 from /usr/include/boost/thread.hpp:13,
                 from /blah,
                 from /bleh,(changed these names, obviously)
                 from /bluh /main.cpp:4:
/usr/include/boost/thread/xtime.hpp: In function 'int xtime_get(xtime*, int)':
/usr/include/boost/thread/xtime.hpp:73:40: error: 'get_system_time' was not declared in this scope
/usr/include/boost/thread/xtime.hpp:73:40: note: suggested alternative:
/usr/include/boost/thread/thread_time.hpp:19:24: note:   'boost::get_system_time'
/usr/include/boost/thread/xtime.hpp: At global scope:
/usr/include/boost/thread/xtime.hpp:88:1: error: expected declaration before '}' token
make[2]: *** [CMakeFiles/edge_based_tracker.dir/main.o] Error 1
make[1]: *** [CMakeFiles/edge_based_tracker.dir/all] Error 2
make: *** [all] Error 2

有任何想法吗？我尝试将 TIME_UTC 更改为 TIME_UTC_，因为这是在另一个站点上向我推荐的，但这似乎没有帮助。

编辑：Boost 版本是版本：1.48.0.2。我在下面附上了xtime：

// Copyright (C) 2001-2003
// William E. Kempf
// Copyright (C) 2007-8 Anthony Williams
//
//  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)

#ifndef BOOST_XTIME_WEK070601_HPP
#define BOOST_XTIME_WEK070601_HPP

#include <boost/thread/detail/config.hpp>

#include <boost/cstdint.hpp>
#include <boost/thread/thread_time.hpp>
#include <boost/date_time/posix_time/conversion.hpp>

#include <boost/config/abi_prefix.hpp>

namespace boost {

enum xtime_clock_types
{
    TIME_UTC=1 //LINE 23
//    TIME_TAI,
//    TIME_MONOTONIC,
//    TIME_PROCESS,
//    TIME_THREAD,
//    TIME_LOCAL,
//    TIME_SYNC,
//    TIME_RESOLUTION
};

struct xtime
{
#if defined(BOOST_NO_INT64_T)
    typedef int_fast32_t xtime_sec_t; //INT_FAST32_MIN <= sec <= INT_FAST32_MAX
#else
    typedef int_fast64_t xtime_sec_t; //INT_FAST64_MIN <= sec <= INT_FAST64_MAX
#endif

    typedef int_fast32_t xtime_nsec_t; //0 <= xtime.nsec < NANOSECONDS_PER_SECOND

    xtime_sec_t sec;
    xtime_nsec_t nsec;

    operator system_time() const
    {
        return boost::posix_time::from_time_t(0)+
            boost::posix_time::seconds(static_cast<long>(sec))+
#ifdef BOOST_DATE_TIME_HAS_NANOSECONDS
            boost::posix_time::nanoseconds(nsec);
#else
        boost::posix_time::microseconds((nsec+500)/1000);
#endif
    }

};

inline xtime get_xtime(boost::system_time const& abs_time)
{
    xtime res;
    boost::posix_time::time_duration const time_since_epoch=abs_time-boost::posix_time::from_time_t(0);

    res.sec=static_cast<xtime::xtime_sec_t>(time_since_epoch.total_seconds());
    res.nsec=static_cast<xtime::xtime_nsec_t>(time_since_epoch.fractional_seconds()*(1000000000/time_since_epoch.ticks_per_second()));
    return res;
}

inline int xtime_get(struct xtime* xtp, int clock_type)
{
    if (clock_type == TIME_UTC)
    {
        *xtp=get_xtime(get_system_time());
        return clock_type;
    }
    return 0;
}


inline int xtime_cmp(const xtime& xt1, const xtime& xt2)
{
    if (xt1.sec == xt2.sec)
        return (int)(xt1.nsec - xt2.nsec);
    else 
        return (xt1.sec > xt2.sec) ? 1 : -1;
}

} // namespace boost

#include <boost/config/abi_suffix.hpp>

#endif //BOOST_XTIME_WEK070601_HPP

编辑：为了清楚起见，代码在导入 boost/thread.hpp 时失败

4

3 回答 3

13

对于那些遇到相同问题并努力在这里找到解决方案的人。源自 noodlebox 的链接（https://svn.boost.org/trac/boost/ticket/6940）：

您可以编辑 /usr/include/boost/thread/xtime.hpp （或您的 xtime.hpp 所在的任何位置）并将所有出现的TIME_UTC更改为TIME_UTC_ - 可能在第 23 和 71 行左右。

IEsed -i 's/TIME_UTC/TIME_UTC_/g' /usr/include/boost/thread/xtime.hpp

于 2014-01-08T08:52:46.027 回答
7

如果您在使用 Boost 时遇到语法错误，您可能需要使用-std=c++11.

您可能已经阅读过的TIME_UTC问题是使用 c++11 的副作用。 TIME_UTC现在在 c++11 中定义为宏，因此您需要替换所有实例TIME_UTCwith TIME_UTC_，或者只使用已修复此问题的更新 (1.50.0+) 版本的 Boost。

见：https ://svn.boost.org/trac/boost/ticket/6940

于 2013-10-02T22:51:53.333 回答
1

由于您没有显示您的代码，我们只能猜测。我的猜测是您TIME_UTC在代码中的某处定义了宏。这个宏搞砸了xtime.hpp标题。

于 2013-07-11T18:30:01.647 回答