Update: By specifying only .a libs I've eliminated all undefined symbols. The last linker issue: 'ERR_load_strings' is duplicated between Oracle libs and libpq'

Update: By specifying only .a libs I've eliminated all undefined symbols. The last linker issue: 'ERR_load_strings' is duplicated between Oracle libs and libpq's dependent libs. This symbol cannot be stripped (it's in a relocation) nor can the one of the libs it appears in be removed without leading to undefined symbols.