There seems to be an ugly dependency between posix-headers and
libcsupport.
Configuring rtems with
../rtems-rc-19990324-0/configure \
--target=i386-rtems \
--prefix=<somewhere> \
--disable-posix
"make RTEMS_BSP=pc386" results into:
[...]
/opt/rtems/bin/i386-rtems-gcc --pipe
-B/users/rtems/src/multi/build/pc386/lib/ -specs bsp_specs -qrtems
-I/users/rtems/src/multi/build/pc386/lib/include/networking -g -Wall
-ansi -fasm -O4 -fomit-frame-pointer -c -o o-pc386/utime.o
../../../../../rtems-rc-19990324-0/c/src/lib/libc/utime.c
In file included from
../../../../../rtems-rc-19990324-0/c/src/lib/libc/utime.c:16:
/opt/rtems/i386-rtems/include/utime.h:4: sys/utime.h: No such file or
directory
../../../../../rtems-rc-19990324-0/c/src/lib/libc/utime.c:24: warning:
`struct utimbuf' declared inside parameter list
../../../../../rtems-rc-19990324-0/c/src/lib/libc/utime.c:24: warning:
its scope is only this definition or declaration,
../../../../../rtems-rc-19990324-0/c/src/lib/libc/utime.c:24: warning:
which is probably not what you want.
../../../../../rtems-rc-19990324-0/c/src/lib/libc/utime.c: In function
`utime':
../../../../../rtems-rc-19990324-0/c/src/lib/libc/utime.c:34:
dereferencing pointer to incomplete type
../../../../../rtems-rc-19990324-0/c/src/lib/libc/utime.c:34:
dereferencing pointer to incomplete type
make[4]: *** [o-pc386/utime.o] Error 1
make[3]: *** [all] Error 1
make[2]: *** [all] Error 1
make[1]: *** [all] Error 1
make[1]: Leaving directory `/lfs/poseidon/users/rtems/src/multi/build/c'
make: *** [all] Error 1
Apparently sys/utime.h is one of the posix headers and therefore gets
not installed (I suppose this is correct).
IMO, this probably indicates that sys/utime.h has to be moved to another
include subdirectory and should not be part of the posix-package.
[AFAIK, sys/*.h are system dependent headers, so why should it be a
posix-header? - Hmm]
From: Eric Norum <eric@skatter.usask.ca>
Date: Sat, 5 Dec 98 13:20:51 -0600
What do you think of this patch? It implements your `tap'
suggestion in a way that adds support for all ethernet devices with
no driver modifications. I also added a return value from the tap
function. If the return value is zero, the packet will be passed up
the chain as usual. If the return value is non-zero the mbuf holding
the packet will be freed and the packet will be dropped.
If you like it, please submit it to Joel.
I guess there needs to be an addition to the network documentation
describing the additional ioctl's -- and a big warning that the tap
function is called from a context that holds the network semaphore.
Here is Eric's patch. I've tested it a bit, and made a couple of
trivial changes. This is certainly better than mine: it should work
for all Ethernet drivers.
==================================================
The only concern I have about this patch is that the tap function may
want to fiddle with the mbuf, calling functions like m_pullup and the
like. If those force the networking code to rearrange the mbuf
structure, then the caller's call to m_freem may crash. I don't know
if this is a realistic concern--I don't know enough about the mbuf
layer.
(Sapporo, Japan) submitted the extended console driver for the
MVME162LX BSP and the POSIX tcsetattr() and tcgetattr() routines.
This device driver supports four serial ports, cooked IO, and
provides a portable base for Zilog 8530 based console drivers.
