I'm porting some oddball software, and trying to get "every" platform, if I
have hardware, and getting more hardware (but not a lot).
So, regarding SPARC, my quick understanding is that:
 OpenBSD has separate "pure" SPARC and SPARC64.
 On SPARC64, gcc accepts -m32 and -m64 (I think),
  defaults to -m64, usermode is "all" 64bit.
 Linux has just SPARC, runs on either hardware, usermode is   mostly 32bit,
gcc accepts -m32 and -m64, defaults to -m32.
 So now, I'm going to have roughly the following ports:    SPARC32_LINUX
(already working)    SPARC64_LINUX     SPARC32_OPENBSD     SPARC64_OPENBSD
(and more NetBSD, OpenBSD, etc.)
In the Linux case, this is two sets of binaries that run on one OS.Folks might
chose 32 perhaps for size or speed or interop withcode that hasn't been ported
to 64, whatever.
So my question then is...well, you see, I only have SPARC64 hardwareand am
unlikely to install SPARC32, though maybe.More so, I'm unlikely to acquire
SPARC32 hardware, unless SPARC64can run SPARC32?
So my question is, do OpenBSD/sparc binaries run on OpenBSD/sparc64?Do
binaries built on OpenBSD/sparc64 with -m32 run on OpenBSD/sparc?And are they
the same?
That is, if I wanted a complete matrix, is:   SPARC32_OPENBSD
SPARC64_OPENBSD
complete, or is there really    SPARC32on32_OPENBSD    SPARC32on64_OPENBSD
SPARC64_OPENBSD
or even more? (64 on 32?)
  http://www.openbsd.org/sparc.html   http://www.openbsd.org/sparc64.html
 appear to list different machines, so that answers part of my question.
sparc won't run on my sparc64 machine.
 If SPARC32 == SPARC32on64, I'll just do those two.  If SPARC32 !=
SPARC32on64, I'll probably just do SPARC64.
Thanks, - Jay