On Fri, Apr 20, 2012 at 1:26 PM, Roland McGrath <rol...@hack.frob.com> wrote: >> Currently we use weak undefined symbol, foo, to do >> >> if (&foo != 0) >> foo is defined. >> else >> foo isn't defined. >> >> We want is to define foo as a secondary symbol so that >> we can always use foo without checking. If there is a primary >> one in a .o file and .so file, we will get the primary one, >> otherwise, we will use the secondary one. > > Why not use a weak definition in the file where you make the call?
It doesn't work for us since a weak definition can't be overridden by another definition in a .so file. -- H.J.
