Hi!
On Fri, May 06, 2005 at 10:12:21PM +0200, Michael Neuhauser wrote:
> > 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
[...]
> 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:
This code tries to detect if you have installed rtai with DESTDIR != "".
> #
> # 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
The procedure does like this:
* Assuming you've configured RTAI with
'configure --prefix=/usr/realtime' and installed it with
'make DESTDIR=/disk/work/armrtai/build/rtai/_xdev'
The includes get installed into:
'/disk/work/armrtai/build/rtai/_xdev/usr/realtime/include'
* you are configure'ing RTnet:
'configure --with-rtai=/disk/work/armrtai/build/rtai/_xdev/usr/realtime'
> 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).
* 'rtai-config --prefix' gives /usr/realtime, and subsequent '--cflags'
would point to nonexisting or wrong dirs like /usr/realtime/include
* the directory supplied with the '--with-rtai=' parameter is stored
in the $RTAI_DIR variable, in your case
'/disk/work/armrtai/build/rtai/_xdev/usr/realtime'
* 'sed' removes the rtai-prefix ("/usr/realtime") from $RTAI_DIR
resulting in '/disk/work/armrtai/build/rtai/_xdev', which is
stored in DESTDIR
* the DESTDIR env-variable modifies the output of
'rtai-config --prefix'. It is prefixed to the paths.
(see [1] for details)
* now the rtai-prefix equals rtai-dir check is repeated
Perhaps we have here a problem with trailings or leading slashes or with
relative paths.
Can you please send your exact RTnet configure command and your
'rtai-config' (/disk/work/armrtai/build/rtai/_xdev/bin/rtai-config),
aswell as the exact paths and commands during 'make install DESTDIR=...'
regards - Marc
[1]
http://www.rts.uni-hannover.de/rtai/lxr/source/base/scripts/rtai-config.in?v=cvs-3.2-vulcano
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