Re: [boost] big problem with dependency changes

Subject: Re: [boost] big problem with dependency changes
From: Peter Dimov (lists_at_[hidden])
Date: 2014-06-17 04:46:55

Bjørn Roald wrote:
> I you do not mind, could you try in a clone for used testing only, or at 
> least not where you have work you have not committed:
>
> rm boost/filesystem.h
>
> b2 headers
>
> cd libs/filesystem
>
> git reset --hard HEAD
>
> then edit
>
> boost/filesystem.h
> or
> libs/filesystem/include/boost/filesystem.h
>
> Then compare them, if they are the same, then I am very interested in 
> understanding why.

The files are different after I edit one of the two hard links.

When I edit in boost/ - which I never do - when I run the tests, b2 then 
sees the file as modified, but does not update the link in boost/ (the link 
being newer than the source in include/.)

When I edit in include/ - which is what I do - b2 sees the file as modified 
and updates the link in boost/ to point to it.

Moral of the story: don't edit the files in boost/.

The exceptions are the headers which b2 can't see as dependencies - those 
included via a macro. They never get their links updated unless one runs "b2 
headers". We've fixed some of them, but not all.