edit: my comment addresses the text from the original link https://www.facebook.com/dan.colascione/posts/10107358290728348 https://www.facebook.com/dan.colascio

edit: my comment addresses the text from the original link https://www.facebook.com/dan.colascione/posts/10107358290728348 https://www.facebook.com/dan.colascione/posts/10107358290728... The author is confused. no-semantic-interposition does not preclude unicity of symbols. There are things like -Wl,-Bsymbolic-functions to relinquish that (and lose strict conformity against the programming language you are using, by the way). When I read a virulent post at least I would like the author to have some deep expertise on the subject, and not mix everything they read about (including related but different matters). I won't even talk about the "interposition is useless anyway because clang has an historical bug" part. As for elf shared libs providing a single symbol space, there are arguments for and against. An argument for a single symbol space is that a process with segregated one per dynamic module is a beast the C and C++ standards know nothing about. And don't even get me started on processes with multiple different C or C++ runtimes simultaneously (take a look at the list of CRTs loaded in an instance of explorer.exe, it is horrifying). Another one is that you can easily move things around between dynamic libs or split them, etc. If various subsets are actually used by multiple executables, this can be quite useful (lacking that property, note that MS had to invent their own additional virtual/redirection layer to refactor the Win32 libs) A practical argument against is that it is "hard" (read: virtually impossible) to dynamically link binary only modules maintained with different-enough toolchains. Likewise for different versions of the same lib (e.g. via transitive deps). But then the question of is this even a good idea shall be asked (well, if you want to load a plugin in a proprietary software I understand this can be wanted -- and this is actually similar to using libs of a proprietary platform; any other use case?)