Re: [Boost-build] use-project for system and not threads

Subject: Re: [Boost-build] use-project for system and not threads
From: Steve Soule (sts11dbxr_at_[hidden])
Date: 2010-04-24 14:03:31

On 04/24/2010 11:49 AM, Steven Watanabe wrote:
> Steve Soule wrote:
>> My project uses the libraries boost_system and boost_thread.  After some
>> experimentation, I found that the following Jamfile (greatly simplified)
>> correctly built my executable with the two libraries:
>>
>> use-project /boost/system : boost/libs/system/build ;
>>
>> exe myprogram
>>   : [ glob src/*.cpp ]
>>     /boost/system//boost_system/<link>static
>>     /boost/thread//boost_thread/<link>static
>>   ;
>>
>> I found that the "use-project" statement was necessary for boost_system
>> but not boost_thread.  I spent an hour or two looking through the
>> various Jamfiles, but was unable to figure out why use-project was
>> necessary for boost_system but not boost_thread.
>>
>> I'm curious why this would be.  Does anyone know why use-project is
>> necessary for boost_system but not boost_thread?
> 
> The Boost Jamroot contains use-project statements for all libraries.
> Once it's loaded, /boost/xxx should work.  You should be able to use
> 
> use-project /boost : boost ;

It is true that you can use this shorter use-project statement instead
of the longer one I used.  This tip should be in the Boost Build
documentation.

But that doesn't answer my question:  why is a use-project statement
necessary for boost_system but not boost_thread?