Byte swapping for doubles

[Fred Kiefer]

I had an email discussion with Nikolaus Schaller about the code in
NSByteOrder.h which does the byte swapping for GNUstep and he convinced
me that we may not handle the case of swapping doubles correctly for
certain ARM processors. Here the word order in doubles seems to differ
from the general byte order.

I had a quick search on the web and found ax_cv_c_float_words_bigendian
(See http://autoconf-archive.cryp.to/ax_c_float_words_bigendian.html).
Is there anybody out there, who understands word/byte order a bit better
and is able to fix this?

Cheers,
Fred