Re: [Boost-build] Equivalent to Perforce Jam -g

From: Nicolas Fleury (nidoizo_at_[hidden])
Date: 2006-01-20 12:40:20

David Abrahams wrote:
>>Hi everyone,
>>
>>Is there any equivalent to -g (build more recent file instead of first 
>>one met in jamfile) 
> 
> I don't understand what that means.  Can you give an example?

 From the doc of Perforce Jam:
-g: Build targets with the newest sources first, rather than in the 
order of appearance in the Jambase/Jamfiles.

and:
The -g flag reorders builds so that targets with newest sources are 
built first. Normally, they are built in the order of appearance in the 
Jamfiles.

I don't know how Boost.Jam behaves.  I assumed it was forked from 
Perforce Jam before introduction of -g flag.

This flag can be useful if you're modifying a .hpp/.cpp pair.  Since the 
.cpp is more recent than other .cpp depending on the same .hpp, it is 
the one that will be compiled first, instead of order of appearance in 
jamfiles.

It is an interesting setting avoiding the necessity to specify an .obj 
target manually (and particularly useful since Visual Studio makefile 
projects don't allow configuration of compilation of a single source file).

Regards,
Nicolas