objcopy --prefix-symbols allows me to prefix all symbols exported by an object file / static library.
Can I perform a more sophisticated transformation?
In particular, I would like to be able to add a C++ namespace to an object file / static library, i.e., demangle the symbols, prefix the result, and remangle it.
Found the answer(s).
objcopy --redefine-sym old=new
objcopy --redefine-syms=filename
--redefine-sym old=new Change the name of a symbol old, to new. This can be useful when one is trying link two things together for which you have no source, and there are name collisions.
--redefine-syms=filename Apply --redefine-sym to each symbol pair "old new" listed in the file filename. filename is simply a flat file, with one symbol pair per line. Line comments may be introduced by the hash character. This option may be given more than once.
c++filt
