Re: [Boost-users] [Chrono][System]:header only Boost.Chrono is not working with header only Boost.System

Subject: Re: [Boost-users] [Chrono][System]:header only Boost.Chrono is not working with header only Boost.System
From: Dmitriy Matison (matison.d_at_[hidden])
Date: 2012-07-06 03:51:14

Hi Vicente:

Thanks for the fast response.
Then there is a bug in documentation:
http://www.boost.org/doc/libs/1_50_0/doc/html/chrono/users_guide.html
Building an Executable that Uses
Boost.Chrono<http://www.boost.org/doc/libs/1_50_0/doc/html/chrono/users_guide.html#chrono.users_guide.getting_started.install.building_an_executable_that_uses_boost_chrono_>

In addition to link with the *Boost.Chrono* library you need also to link
with the *Boost.System* library. Once *Boost.System* will be configurable
to be a header only using BOOST_SYSTEM_INLINED you will no need to link
with it.
Thanks,
Dmitriy.

On 6 July 2012 00:56, Vicente J. Botet Escriba <vicente.botet_at_[hidden]>wrote:

> Le 05/07/12 19:20, Dmitriy Matison a écrit :
>
>  Hi,
>>
>> On RHEL 5.5 Boost.Chrono 1.1.0 (Boost 1.47.0) fails to run in header only
>> mode with header only Boost.System.
>>
>> This file can't be compiled:
>>
>> #define BOOST_SYSTEM_NO_DEPRECATED  // without it also error, but in
>> [Boost.System]
>> #define BOOST_SYSTEM_INLINED
>> #define BOOST_CHRONO_HEADER_ONLY
>>
>> #include <boost/chrono.hpp>
>>
>> int main() {
>>     boost::chrono::steady_clock::**time_point start =
>> boost::chrono::steady_clock::**now();
>>     return 0;
>> }
>>
>> Error:
>> In function `boost::chrono::steady_clock::**now()':
>> boost/chrono/detail/inlined/**posix/chrono.hpp:85: undefined reference
>> to `boost::system::system_**category()'
>>
>> Any comments from Chrono\System guys?
>>
>>
>>  Hi,
>
> unfortunately the patch proposed to make Boost.System header only was not
> accepted.
>
> So even if Boost.Chrono is header-only it depends on a library that is not
> :(
>
> Best,
> Vicente
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>