Hello EMC2 developers,
I found the steps of
DebuggingRtapi<http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?DebuggingRtapi>failed
for Ubuntu 9.10.
While I started "gdb rtapi_app" and give "run" command,
I got the following error:
$ gdb rtapi_app
GNU gdb (GDB) 7.0-ubuntu
...
Reading symbols from /home/ysli/proj/emc2-dev/bin/rtapi_app...done.
(gdb) run
Starting program: /home/ysli/proj/emc2-dev/bin/rtapi_app
[Thread debugging using libthread_db enabled]
Cannot find new threads: generic error
(gdb)
And, there's no way to debug rtapi_app then.
After googled and digging into this issue for several hours,
I'm happy that I found a workaround:
linking rtapi_app with
libpthread<http://sourceware.org/ml/gdb/2008-08/msg00288.html>
1. edit src/rtapi/Submakefile
2. add "-lpthread" to "$(CXX) -rdynamic $(LDFLAGS) -o $@ $^ -ldl
$(PTH_LINK)"
3. rm bin/rtapi_app
4. cd src; make
5. $ gdb rtapi_app
GNU gdb (GDB) 7.0-ubuntu
...
Reading symbols from /home/ysli/proj/emc2-dev/bin/rtapi_app...done.
(gdb) run
Starting program: /home/ysli/proj/emc2-dev/bin/rtapi_app
[Thread debugging using libthread_db enabled]
6. it works!
Yishin
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