On Fri, Dec 03, 2010 at 10:57:59PM +0100, Olaf van der Spek wrote: > >> BTW, got my mail about auto linking? > > > > I saw it, yes. I'm not sure how MSVC implements auto-linking, but > > I would be concerned about the determinism of such behaviour, > > especially when a given symbol could be satisfied by a number of > > different libraries. For Boost, a given symbol might be satisfied > > by a number of different library versions which could be installed > > concurrently; how would you know which was the correct one? > > The header knows what version it is, so it can use that to link to the > correct lib.
The header is just a text file. It doesn't contain any library dependency information (or version information) at all, and there's no way to associate a given header with any shared library at all. Untimately it's just expanded into your source file and passed through the compiler; and libraries used there need to be linked in (by you) at link time. // boost/filesystem/filesystem.hpp -----------------------------------------// // Copyright Beman Dawes 2005 // Use, modification, and distribution is subject to the Boost Software // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at // http://www.boost.org/LICENSE_1_0.txt) // See library home page at http://www.boost.org/libs/filesystem //----------------------------------------------------------------------------// #ifndef BOOST_FILESYSTEM_FILESYSTEM_HPP #define BOOST_FILESYSTEM_FILESYSTEM_HPP #include <boost/filesystem/operations.hpp> // includes path.hpp #include <boost/filesystem/convenience.hpp> #endif -- .''`. Roger Leigh : :' : Debian GNU/Linux http://people.debian.org/~rleigh/ `. `' Printing on GNU/Linux? http://gutenprint.sourceforge.net/ `- GPG Public Key: 0x25BFB848 Please GPG sign your mail.
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