[syslinux] gnu-efi memset/memcpy

[Ady Ady]

> But not this library surely ? Looking at gnu-efi one can see that is is a workaround for gcc/MSVC
> and only for memcpy/memset :
>   https://sourceforge.net/p/gnu-efi/code/ci/b1d426ce67cbeaa1a8ec7d9b8d0d8071ae4563b4/
> I have suggested that gnu-efi should use weak syms for these.
 
Just an attempt to "keep it all together" (Nigel Croxon doesn't seem to 
be "connecting" the following first 2 items):

_ "syslinux fails to build: multiple definition of `memset'", from 
Joakim Tjernlund,
 https://sf.net/p/gnu-efi/bugs/16/ 

_ "jmp_buf definition violates C standard", from hpa,
 https://sf.net/p/gnu-efi/bugs/17/ 


(and one additional item that _maybe_ has some kind of influence?...)
_ "Add -ffreestanding to compiler flags", from David Woodhouse 
 https://www.syslinux.org/archives/2018-August/026159.html 

Regards,
Ady.