static functions appearing in the symbol table

[Martin Faltesek <martin.faltesek@xxxxxxxxx>]

While using gcc, I've noticed that some static functions appear in the
symbol table while others do not. What are the conditions that control
when a static function's symbol appears? I would have thought all
statics would not be included.

This observation arose while debugging stack traces in the linux
kernel. (and using ftrace).

Using arm-linux-gcc 4.9.1.

Thanks