Isolating a Group

The default assignment of world symbol search scope to the objects obtained by a dlopen(3DL) can be reduced to group by augmenting the mode argument with the RTLD_GROUP flag. Under this mode, any objects obtained through a dlopen(3DL) will only be allowed to look for symbols within their own group.

Objects can have the group symbol search scope assigned to them when they are built by using the link-editors' -Bgroup option.

If a member of a group, having group search capability, is referenced by another group requiring world search capability, the object's search capability will become a concatenation of both group and world. This promotion of attributes will remain, even if the world group reference is later removed.