[rescue] glibc on sun3

[Doug McIntyre]

On Fri, Apr 24, 2020 at 04:48:06PM -0700, Dan Moisa wrote:
> I've been trying to get both the X11R6.8 from sun3arc going, as well as
> compiling a dhcp package. They all get stuck in missing memmove, which I
> gathered comes from glibc. Is that the only source?
> 
> I haven't been able to successfully compile a glibc yet. I have a 3/60 with
> the 4.1.1U1. Neither the 3.2.3 gcc from sun3arc nor a hand-built 2.7.2.3
> can compile either glibc-1.09.1 or 2+. I either fail compilation for
> various reason, or the tests segfault/memory error at various stages.
> 
> At the moment I'm just trying to get the newer X working, though eventually
> I'd like a working glibc too. Anyone know/have the sequence of things that
> make this work?


SunOS/BSD of the era had bcopy() instead of the SysV'ish memmove()
(that became part of the standard). 

IIRC, it was the same call, but the src & dst were reversed.

Perhaps something like

#define memmove(dst, src, n) bcopy((src), (dst), (n))

would let you move forward.

Otherwise, you should be able to find many opensource libc's to raid.
Ie. I'd start at FreeBSD.
https://github.com/freebsd/freebsd/blob/master/lib/libc/string/memcmp.c
(which is actually defined in bcopy.c anyway).

The 'b' string functions were one of the most common differences
between code written for BSD systems and what was becoming some of the
standard lib functions.