On 01/08/2012 09:38 PM, Jakub Nowacki wrote:
On 06/01/12 09:40, Gilles Chanteperdrix wrote:
> This is not the same issue as Gregory. Gregory missing symbols were from
> libnative, and we know that examples makefiles include -lnative, so,
> libnative is probably not installed in the place where the linker looks
> for it: that is an installation issue.
> On the other hands, the symbols from the errors you show us are defined
> in libxenomai.so. So, the RTXI build system is likely using hardcoded
> flags instead of the flags returned by xeno-config: that is a makefile
> issue.
>
OK, maybe my problem is not similar but I still get unresolved
reference. Below I show the full listing when compilation fails
/bin/bash ../libtool --tag=CXX --mode=link g++ -pipe -Wall
-I/usr/share/qt3/include -DQT_THREAD_SUPPORT -O2 -L/usr/share/qt3/lib
-lqt-mt -lSM -lICE -lX11 -lXext -lXmu -lXt -lXi -lgsl -lgslcblas -lm
-L/usr/xenomai/lib -lxenomai -lpthread -lrt -lnative -o rtxi cmdline.o
daq.o default_gui_model.o event.o fifo.o io.o main.o main_window.o
mutex.o plugin.o rt.o rtfile.o rwlock.o sem.o settings.o workspace.o
rt_os-xenomai.o moc_default_gui_model.o moc_main_window.o moc_plugin.o
-rdynamic
libtool: link: g++ -pipe -Wall -I/usr/share/qt3/include
-DQT_THREAD_SUPPORT -O2 -o rtxi cmdline.o daq.o default_gui_model.o
event.o fifo.o io.o main.o main_window.o mutex.o plugin.o rt.o rtfile.o
rwlock.o sem.o settings.o workspace.o rt_os-xenomai.o
moc_default_gui_model.o moc_main_window.o moc_plugin.o -rdynamic
-L/usr/share/qt3/lib /usr/lib/libqt-mt.so -lSM -lICE -lX11 -lXext -lXmu
-lXt -lXi -lgsl -lgslcblas -lm -L/usr/xenomai/lib
/usr/xenomai/lib/libxenomai.so -lpthread -lrt
/usr/xenomai/lib/libnative.so -Wl,-rpath -Wl,/usr/xenomai/lib -Wl,-rpath
-Wl,/usr/xenomai/lib
References should precede definitions. Try swapping libxenomai.so and
libnative.so in your link order. As Gilles already suggested, using the
xeno-config script in your Makefile to get the proper link flags would
have prevented this issue.
/usr/xenomai/lib/libnative.so: undefined reference to `xeno_current'
/usr/xenomai/lib/libnative.so: undefined reference to `xeno_sem_heap'
/usr/xenomai/lib/libnative.so: undefined reference to
`xeno_sigshadow_install_once'
/usr/xenomai/lib/libnative.so: undefined reference to `xeno_set_current'
/usr/xenomai/lib/libnative.so: undefined reference to `xeno_map_heap'
/usr/xenomai/lib/libnative.so: undefined reference to `xnarch_tsc_to_ns'
/usr/xenomai/lib/libnative.so: undefined reference to
`xeno_handle_mlock_alert'
/usr/xenomai/lib/libnative.so: undefined reference to `xeno_fault_stack'
/usr/xenomai/lib/libnative.so: undefined reference to
`xeno_set_current_mode'
/usr/xenomai/lib/libnative.so: undefined reference to `xeno_bind_skin_opt'
/usr/xenomai/lib/libnative.so: undefined reference to `xeno_current_mode'
/usr/xenomai/lib/libnative.so: undefined reference to `xnarch_ns_to_tsc'
collect2: ld returned 1 exit status
make[1]: *** [rtxi] Error 1
make[1]: Leaving directory `/usr/src/rtxi-1.31/rtxi'
make: *** [all-recursive] Error 1
I use xeno-config to get flags, as you can see in the above libtool
command. I'm not the expert on autotools, but everything seems to look
OK. I even tried to add xenomai LD_LIBRARY_PATH, but the result is still
the same. I think I give it a go with 2.5.6 and see if the error is
there; I installed xenomai 2.5.6 for RTXI a couple of times on different
machines and I don't recall this problem. Just to be absolutely clear,
I'm suing Ubuntu 11.04 with GCC 4.6 (I checked 4.5 and I get the same
thing).
Best wishes,
Jakub
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--
Philippe.
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