Instead of looking for htobe64 which is be available both when
be64toh or betoh64 are, check for the latter functions. If we
find betoh64 but not be64toh, use compat #defines. If both
can't be found, search for OSX' OSSwapHostToBigInt64.
Also include sys/types.h in byteorder.h (which is necessary for
byteorder functions on OpenBSD), and incidentally fixes build
of networkfragment.cc.
Fixes build on OpenBSD
Signed-off-by: Jérémie Courrèges-Anglas <jca@wxcvbn.org>
EL5 lacks htobe64 and friends. Using its byteswap.h requires an endianness
check in our headers, which is fragile and compiler-dependent. It's a fair
amount of code [1], and is only useful on EL5.
So instead, let's include a fallback implementation of these functions, and use
it whenever we can't find the (now-)standard Linux or OS X routines. The
fallback is endianness-independent and should work on any platform.
[1] https://github.com/rurban/mosh/commit/da1a5abd1e09f0c1e9295357bb480a643d9dc8e3
John Hood