The following were assumed to be present by multiple libc
methods or networking commands:
+ _PATH_DEVNULL ==> /dev/null
+ SIZE_T_MAX ==> SIZE_MAX
+ O_EXLOCK ==> O_EXCL
If you define DISABLE_IPV6=yes to the config.inc, then the
rtems-bsd-config.h file will be modified accordingly and
the IPV6 kernel sources will not be built. This is easier
to manage and more correct than having a patch to do the same.
This allows the old stack's configuration structures to be used
unchanged even though this code currently does not support all
of the options. It likely will never support all of the options
as some should eventually come through configuration files as
they would in a real FreeBSD system. Other configuration
parameters are likely configurable via "hints".
The code in rtemsbsd/freebsd/machine/bus.h assumed that all bus space
accesses were through memory in a simple fashion. The i386 has a true
distinction between I/O and memory space which must be accounted for.
This may not be the eventual structure of this code but we must
have different bus space accessors for different hardware configurations.
And in many, if not most, cases we will want these to be inlined for
performance.
