Error on cling LoadLibrary

I’m trying to load a compiled library using gSystem->Load(), and I’m getting an error I wasn’t expecting:

cling::DynamicLibraryManager::loadLibrary(): /my/ undefined symbol: _ZN5TROOT14RegisterModuleEPKcPS1_S2_S1_S1_PFvvERKSt6vectorISt4pairISsiESaIS7_EES2_

This appears to correspond to:
TROOT::RegisterModule(char const*, char const**, char const**, char const*, char const*, void (*)(), std::vector<std::pair<std::string, int>, std::allocator<std::pair<std::string, int> > > const&, char const**)

There are various ROOT-derived classes built in this library, along with a dictionary made by rootcling from a LinkDef.

Using ROOT 6.10/08 with GCC 6.2.0.

Any ideas?

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Apologies for replying only now. The dictionary was likely built with a different version of ROOT. ROOT dictionaries must be rebuilt when switching to a new ROOT version; they are also platform dependent i.e. the dictionary should be build, not checked into the source repository.

Cheers, Axel.