On Wed, Apr 11, 2018 at 11:45:07PM -0700, Chuck Guzis via cctalk wrote:
  Looks pretty much like standard C until you get into
the minutiae, such
 as "A character constant is 1 to 4 characters" and page 4-4 "Data
Types"
 (9 bit characters and 36 bit ints and 18 bit short ints).
 So, it should be pretty straightforward unless you assume that a char
 is 8 bits, with a signed char having a range of +/-255. 
"pretty straightforward"
Thanks.  I needed a laugh.
As someone who tries to get/keep a zillion open source packages building
on FreeBSD, on non-x86 archs, I constantly refer to a piece of paper that
hangs on my wall.  It was given to me many years ago at a conference, by
its author, Henry Spencer.  An annotated version may be found here:
  
https://www.lysator.liu.se/c/ten-commandments.html
Of course these days s/VAX/32-bit Linux distro/, but the principle still
holds.
Finally, for any remaining disbelievers, the most recent update of
FreeBSD's toolchain to include Clang version 6, regressed 419 port
builds -- on x86 alone.
mcl