Subject: Re: [boost] [Booster] Or boost is useless for library developers
From: Artyom (artyomtnk_at_[hidden])
Date: 2010-05-15 10:32:18
> Well, due to the inner shape of boost, such change are
> What can be done is having such ABI-breaking change
> documented in a
> big, red, blinking part of the documentation.
Then all documentation would be red and blinking.
- Class layout of many libraries may change with some small feature
in configuration that may depend if you compile with gcc-4.1 or gcc-4.3
- Good example shared_ptr:
- You may add debug define and class layout is changed
- Sometimes it uses pthread sometimes atomic operations and it depends
on so many things. And every 2nd boost upgrade added implementation
for new platform.
So **every library** that uses shared_ptr (like every 2nd boost
library) would break ABI.
The problem that Boost as whole never looks on ABI.
> Did you repackaged libstd++5 when the 6 went out and broke
> some binary compatibility ?
6 Years ago? To be honest these days I don't remember if I had any project
in C++ at all ;-)