memmov/memset/memcpy without libc

[Andreas Geißler <setjem@xxxxxxxxxxxxxx>]

Hi,
I'm trying to port gcc for my own target system.
I want to avoid the compilation of libc, therefore i use
-nodefaultlibs for compiling.
But if I want to still use memmov/memset/memcpy where do i have describe them?
A define expand memmov does not seem to be sufficient.

Tanks in advance.

Best regards,
Andreas