So looking at how I build GCC __aeabi_uidiv is HIDDEN for 4.7 and 4.8.
So can you you post your libgcc/config.log somewhere for 4.7 & 4.8, and point us to them? (To save time I'm also probably going to want the complete build log at some stage for libgcc - so it is probably worth posting those as well).
In particular I am interested in the values of vs_hide and libgcc_cv_hidden_visibility_attribute.