Re: [Boost-users] Help me out from boost.log

Subject: Re: [Boost-users] Help me out from boost.log
From: Steven Woody (narkewoody_at_[hidden])
Date: 2011-01-23 12:23:29

On 22 January 2011 02:06, Tarcisio Fedrizzi <tarcisio.fedrizzi_at_[hidden]> wrote:
> On 21/01/2011 18:42, Steven Woody wrote:
>>
>> Hi,
>
> Hi,
>>
>> I want to use boost.log and I succeeded in building it with bjam with
>> Visual Studio 2005.  But I quickly found I cannot use it.
>>
>>
>> Below code are from the tutorial,
>>
>> #include<boost/log/core.hpp>
>> #include<boost/log/trivial.hpp>
>> #include<boost/log/filters.hpp>
>>
>>
>>     logging::core::init_log_to_file(
>>             keywords::file_name = "dsttest_%N.log",
>>             keywords::rotation_size = 10 * 1024 * 1024,
>>             keywords::time_based_rotation
>>             = sinks::file::rotation_at_time_point(0, 0, 0),
>>             keywords::format = "[%TimeStamp%]: %_%"
>>             );
>>     logging::core::get()->set_filter(
>>             flt::attr<logging::trivial::severity_level>("Severity")
>>             >= loggin::trivial::debug
>>             );
>>
>> but the compiler (vc++ 8.0) just complains:
>>
>> error C2653: 'logging' : is not a class or namespace name
>> error C2653: 'keywords' : is not a class or namespace name
>> ...
>
> look here
> http://boost-log.sourceforge.net/libs/log/doc/html/log/how_to_read.html

Thanks for this!  I changed the code accordingly to:

    boost::log::init_log_to_file(
            boost::log::keywords::file_name = "dsttest_%N.log",
            boost::log::keywords::rotation_size = 10 * 1024 * 1024,
            boost::log::keywords::time_based_rotation
            = boost::log::sinks::file::rotation_at_time_point(0, 0, 0),
            boost::log::keywords::format = "[%TimeStamp%]: %_%"
            );
    boost::log::core::get()->set_filter(
            boost::log::filters::attr<boost::log::trivial::severity_level>("Severity")
            >= boost::log::trivial::debug
            );

it seems solved the namespace problem, but I then got some other errors:

1>d:\woody\svn\fox3-dst\trunk\test\dsttest.cpp(30) : error C2039:
'init_log_to_file' : is not a member of 'boost::log_mt_nt5'
1>d:\woody\svn\fox3-dst\trunk\test\dsttest.cpp(35) : error C2039:
'format' : is not a member of 'boost::log_mt_nt5::keywords'
1>d:\woody\svn\fox3-dst\trunk\test\dsttest.cpp(35) : error C2065:
'format' : undeclared identifier
1>d:\woody\svn\fox3-dst\trunk\test\dsttest.cpp(30) : error C3861:
'init_log_to_file': identifier not found

What's wrong now?

>>
>> I tried to use boost::log::logging, but it did not help.
>>
>> Then I decided to try the most simple code:
>>
>>     BOOST_LOG_TRIVIAL(debug)<<  "hello boost.log";
>>
>> it passed the compiler but not the linker:
>>
>> libboost_log-vc80-mt-gd-1_45.lib(trivial.obj) : error LNK2019:
>> unresolved external symbol "class boost::system::error_category const
>> &  __cdecl boost::system::generic_category(void)"
>> (?generic_category_at_system@boost@@YAABVerror_category_at_12@XZ) referenced
>> in function "void __cdecl boost::system::`dynamic initializer for
>> 'posix_category''(void)" (??__Eposix_category_at_system@boost@@YAXXZ)
>> ....
>
> you probably need to link the boost::system library in order to
> use the log library.

What you mean 'link the boost::system" library?  I manually linked in
the stage/lib/libboost_system-vc80-mt*.lib, but it did not help.

Looking for your further reply and thank you anyway!

>>
>> Please help me!  Thanks in advance.
>>
> Bye,
> Tarch.
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> Boost-users mailing list
> Boost-users_at_[hidden]
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>

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narke
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