Miles Bader <miles@xxxxxxx> writes: > Sure, then the gcc doc can say "(see <all-about-pic> for details)"... :) OK, so first write that document.... > Are symbols in a shared object loaded with e.g. dlopen "visible" (in the > sense of being unified with symbols in the executable, not visible via a > special lookup like dlsym)? When a library is opened by dlopen the executable has already been dynamically linked, and in any case the dlopen'ed library comes last in the symbol lookup order. So the question is only meaningful with regard to what happens to symbol references in the dlopen'ed library. The answer to that question depends on the RTLD_DEEPBIND flag to dlopen (and of course on whether the library has the DT_SYMBOLIC tag or DF_SYMBOLIC flag). The RTLD_GLOBAL flag controls whether the dlopen'ed shared library's symbols are available for linking with subsequent dlopen'ed libraries. Ian
