[Boost-build] link rules and "piecemeal"

Subject: [Boost-build] link rules and "piecemeal"
From: Thorsten Ottosen (tottosen_at_[hidden])
Date: 2017-11-13 08:43:44

Hi all,

I was trying to figure out some very strange linking behavior where 
symbols where missing.

I finally tracked it down in tools/darwin.jam. I don't know if this is a 
problem on other platforms.

Anyway, at the bottom it says

actions piecemeal achieve
{
 Â Â  ...
}

So what happened for me was that the link command was too long and so 
bjam generated two commands because of "piecemeal". The end result was 
that the second invocation overwrote the lib file, resulting in a lib 
file with only 10% of the compiled object files.

I fixed it by adding --abbreviate-paths to the command line, but it 
would have been nice if the tool would give an error instead of silently 
generating two incompatible achieve commands.

kind regards

Thorsten