Just type "man gcc" and look for -nostdlib option or I have copied part of gcc manual as: -------------------------------------------- -nostdlib The compiler may generate calls to memcmp, memset, memcpy and memmove. These entries are usually resolved by entries in libc. These entry points should be supplied through some other mechanism when this option is specified. -------------------------------------------- As you can see from the manual, compiler still generates some calls to those functions, so dear Ian why memcpy is built in according to what you wrote? > 5) Ian said: > "The compiler does by default treat functions like memcpy as builtins, > and ..." > If memcpy is built in why gcc still generates some calls to memcpy > and memcpy should be provided some how as the manual of gcc says? Where does the manual say that?
