macro BITS_BIG_ENDIAN

[DJ Delorie]

> There is no way to control the order of bit-field allocation.

Yet.

> This is the "right" way to do things.

No, it's just the easy way.  Given that the SH vendor compiler does it
the "other" way, by definition GCC is doing it wrong.

> Apparently, Red Hat has patches that allow one to switch the order
> of bit-field allocation, but these patches have not been
> contributed.

I've tried.  My first attempt was rejected.  I proposed some target
hooks to let me make a second attempt, but got no approval (or reason
for rejection) for them.