[ltt-dev] lttv-gui fails to run: libguievents.so: undefined symbol: LTTV_VIEWER_CONSTRUCTORS

[Cui, Dexuan]

Hi all,
I'm a Poky (http://pokylinux.org/, an opensource tool that can build a bootable embedded Linux image) developer and when trying to run lttv-gui from the target system (emulated by qemu x86), I meet with the issue as stated in the subject.

I'm using lttv-0.12.36-18112010(I know 0.12.37 is the latest version, but I don't think it would help here) and after I cross-compile (my host's CPU is Intel Core i7 CPU and I run 32-bit Ubuntu, so this is actually the same as the target system) and install it into the target qemux86 system, I meet with the issue when running it. BTW: lttv builds and runs fine in my host environment and I only meet with the issue in target system.

In target system, I found "lttv.real -m lttvwindow" could run fine, e.g., I could see a window; but "lttv.real -m lttvwindow -m guievents" got the undefined LTTV_VIEWER_CONSTRUCTORS error.

I'm a newbie to lttv. My understanding is: LTTV_VIEWER_CONSTRUCTORS is defined in liblttvwindow.so("nm -D /usr/lib/lttv/plugins/liblttvwindow.so | grep LTTV_VIEWER_CONSTRUCTORS" does show the type of LTTV_VIEWER_CONSTRUCTORS is "B", meaning BSS section) , so after loading liblttvwindow.so, lttv.real should never get the undefined symbol issue when loading libguievents.so, but ...

BTW, I pasted the log of "lttv.real -v -e -d" at the end of the mail.

I'm debugging the issue. Any suggestion is appreciate! 

Thanks!

-- Dexuan 

root at qemux86:~# cat /usr/bin/lttv-gui
#!/bin/sh
# -* sh *-

# This is a simple script that starts lttv with default GUI modules
# Mathieu Desnoyers 15-09-2005

LTTV_CMD=`echo $0 | sed 's/-gui$//'`

$LTTV_CMD.real -v -e -d -m lttvwindow -m guievents -m guifilter -m guicontrolflow -m resourceview \
    -m guistatistics -m guitracecontrol

root at qemux86:~# lttv-gui
** INFO: Logging set to include INFO level messages
** INFO: Option edebug encountered
** INFO: Output event detailed debug
** INFO: Option debug encountered
** INFO: Logging set to include DEBUG level messages
** INFO: Option module encountered
** (process:456): DEBUG: Option module hook called
** INFO: Load library lttvwindow
** INFO: Try path /usr/lib/lttv/plugins/liblttvwindow.so
** INFO: Library lttvwindow (/usr/lib/lttv/plugins/liblttvwindow.so) loaded
** INFO: Module state: init()
** INFO: Module stats: init()
** INFO: Module sync: init()
** (process:456): DEBUG: Sync init
** INFO: Add option sync
** INFO: Add option sync-stats
** INFO: Add option sync-null
** INFO: Add option sync-analysis
** INFO: Add option sync-reduction
** INFO: Add option sync-graphs
** INFO: Add option sync-graphs-dir
** INFO: Add option eval-rtt-file
** INFO: Module lttvwindow: init()
** (process:456): DEBUG: GUI init()
** INFO: Add option trace
** INFO: Unload library lttvwindow: module lttvwindow used
** (process:456): DEBUG: Option verbose rescanned, skipped
** (process:456): DEBUG: Option edebug rescanned, skipped
** (process:456): DEBUG: Option debug rescanned, skipped
** (process:456): DEBUG: Option module rescanned, skipped
** INFO: Option module encountered
** (process:456): DEBUG: Option module hook called
** INFO: Load library guievents
** INFO: Try path /usr/lib/lttv/plugins/libguievents.so
** INFO: Trial failed, /usr/lib/lttv/plugins/libguievents.so: undefined symbol: LTTV_VIEWER_CONSTRUCTORS
** INFO: Try path libguievents.so
** INFO: Trial failed, /usr/lib/libguievents.so: undefined symbol: LTTV_VIEWER_CONSTRUCTORS
** INFO: Failed to load guievents

** ERROR **: Cannot load library guievents: /usr/lib/lttv/plugins/libguievents.so: undefined symbol: LTTV_VIEWER_CONSTRUCTORS
/usr/lib/libguievents.so: undefined symbol: LTTV_VIEWER_CONSTRUCTORS

aborting...
Aborted