722a6f6b97
Some platforms respect RTLD_LOCAL: symbols from libraries loaded with this flag cannot be resolved by dlsym through the process. They should instead be exposed to the JIT by calling ExposeHiddenSharedLibrarySymbols(). But then the JIT needs to actually make use of these libraries from symbol resolution. That is done by setting SearchOrder to SO_LoadedLast, as nicely documented in that flag. Fixes ROOT not finding libCling symbols on some platforms, e.g. CentOS7, Ubuntu 16 and 18.