Sorry for the bump, but I am having a somewhat similar issue when trying to load a library.
I recompiled it with Root 6.14.04, it’s some sort of encapsulation of Armadillo to use it into Root, and I am getting the following error when Root starts:
cling::DynamicLibraryManager::loadLibrary(): /directory/to/KArma.so: undefined symbol: _ZN4arma23arma_rng_cxx11_instanceE
root [0]
Seems to be an issue with Armadillo’s Arma_RNG, but I can’t pinpoint the exact problem with it.