The way that has been done in the past was too add the libc functions
to the base FLASH symbol table. That symbol table draws the libc
functions into the base FLASH image*. Then there is one copy of the
libc functions in base FLASH and no libc functions in the ELF
module. The ELF module is linked to the libc functions just as they
are linked to the OS inteface functions.
(And I forgot ... don't link the ELF module with libc.a so that all of
the libc symbols are undefined and will get the values from the base
FLASH symbol table when the ELF module is dynamically loaded.
