On Fri, 2005-05-06 at 19:13, Jan Kiszka wrote:
> Hello,
>
> today I switched on the ARM architecture in RTnet's configure and tried
> to build with some half-baked cross-environment (I have not real ARM
> hardware around). The test was against RTAI 3.2 (CVS) and kernel 2.6.7.
> Compilation worked except for the lxrt userspace example. If it may
> already run - don't know. We are lacking at least some drivers for
> specific on-board NICs, but "useless" rt_loopback should work. If one of
> the ARM gurus around have the time, please take a look at the RTnet SVN
> and report problems back.
I've checked out the trunk (revision 789) and gave it a shot
(linux-2.4.21-rmk1-crus1.4.2 on a EDB9301, current vulcano (with some
minor local modification that I haven't committed yet).
I was not able to pass the configure stage because of troubles with
DESTDIR detection:
[...]
checking for RTAI 24.1.x source tree... no
checking for RTAI 3 installation... /disk/work/armrtai/build/rtai/_xdev
checking for RTAI DESTDIR... configure: error: *** Cannot identify
DESTDIR
I've looked at configure.ac and I have to say I that I don't understand
how this should work:
#
# check if rtai-3 is installed with DESTDIR
# e.g.: 'make DESTDIR=/foo install'
#
AC_MSG_CHECKING([for RTAI DESTDIR])
RTNET_RTAI_PREFIX="`${RTAI_CONFIG} --prefix | sed -e s,[/]*$,,`"
# strip trailing slashes
if test "${RTNET_RTAI_PREFIX}" \!= "${RTAI_DIR}"; then
RTNET_RTAI_DESTDIR="`echo ${RTAI_DIR} | sed -e
s,${RTNET_RTAI_PREFIX}$,,`"
export DESTDIR="${RTNET_RTAI_DESTDIR}"
RTNET_RTAI_PREFIX="`${RTAI_CONFIG} --prefix | sed -e s,[/]*$,,`"
# strip trailing slashes
if test "${RTNET_RTAI_PREFIX}" = "${RTAI_DIR}"; then
AC_MSG_RESULT([${DESTDIR}])
else
AC_MSG_ERROR([*** Cannot identify DESTDIR])
fi
Note that RTNET_RTAI_PREFIX is assigned the same value twice
(/usr/realtime in my case) and RTAI_DIR is not changed between the two
tests. So if the first test (i.e. ${RTNET_RTAI_PREFIX}" \!=
"${RTAI_DIR}") is true, the second one will be false (and an error is
generated).
Another thing: maybe my directory layout is not compatible to your
assumptions (the line after the first test hints in that direction):
On the development machine (i386):
/disk/work/armrtai/src/rtai RTAI source directory
/disk/work/armrtai/build/rtai RTAI build directory
/disk/work/armrtai/build/rtai/_xdev RTAI install directory for
cross-development
(i.e. "make DESTIR=... install"
in build dir.)
On the target machine (ARM):
/usr/realtime RTAI installation
Mike
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