Re: [Boost-build] Cache-file path handling bug on Windows

Subject: Re: [Boost-build] Cache-file path handling bug on Windows
From: Jürgen Hunold (jhunold_at_[hidden])
Date: 2013-05-21 10:25:33

Hi Steven,.

On Thursday, 16. May 2013 09:18:13 Steven Watanabe wrote:
> AMDG
> 
> On 05/16/2013 08:23 AM, Jurko Gospodnetić wrote:

> >   Problem seems to be caused by the jam target's path being constructed
> > 
> > with an additional leading slash separator, i.e. using internal Boost
> > Build instead of native OS path representation.
> > 
> >   The problem can be patched by tweaking the save() rule in
> > 
> > config-cache.jam a bit. Instead of:
> >     local target = <new-cache-file>$(.cache-file) ;
> > 
> > do:
> >     local cache-file-native = [ path.native $(.cache-file) ] ;
> >     local target = <new-cache-file>$(cache-file-native) ;
> 
> This looks correct.  Please commit it.

I have applied Jurko's patch in 
http://svn.boost.org/trac/boost/changeset/84402

including using path.native for loading, too. Works here.

> >   However, from my quick-glance through the code, I am not really sure
> > 
> > this is a clean solution. I do not understand why the <new-cache-file>
> > prefix is used nor did I check to see if other Boost Jam targets in
> > Boost Build are constructed using their full path information or not.
> 
> The grist is to distinguish between different
> targets with the same name.  The target used
> to read the cache needs to be different from
> the target used to write the cache.
> 
> >   Could someone more familiar with this code (Steven?) take a look? Or
> > 
> > should I go and dig deeper?
> > 
> >   Also, some test for this project-cache.py functionality should be
> > 
> > added to the Boost Build test suite. I can add it if someone can explain
> > to be what it is supposed to do.
> 
> It affects any tests using configure.  The
> sole effect is to avoid rerunning configuration
> tests.

Tests are still needed. Sorry, running low on time at the moment.

Yours,

Jürgen
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