External Library Link Error [closed]
I'm trying to use external library file "libdssp_rs232_drive_module.so".
I met following error message.
Linking CXX executable ../dssp
CMakeFiles/dssp.dir/src/dssp.o: In function `main':
/home/hass/my_robot/dssp/src/dssp.cpp:9: undefined reference to `dssp_rs232_drv_module_create(char const*, int)'
collect2: ld returned 1 exit status
------------------------------------------------------------------------------
My setup files are followings
CMakeLists.txt
cmake_minimum_required(VERSION 2.4.6)
include($ENV{ROS_ROOT}/core/rosbuild/rosbuild.cmake)
rosbuild_init()
rosbuild_add_executable(dssp src/dssp.cpp)
target_link_libraries(dssp dssp_rs232_drive_module)
manifest.xml
<package>
...
<export>
<cpp cflags="-I${prefix}/include" lflags="-L${prefix}/lib -Wl,-rpath,${prefix}/lib -ldssp_rs232_drive_module"/>
</export>
</package>
How can I solve this problem?
PS. I tried to make execution file of microstrain_3dmgx2_imu Package, which is the officially published package in ROS DIAMONDBACK. sudo make clean sudo make But I met the same error massage. Why does the officially published package have the same link error?
Closed for the following reason
question is not relevant or outdated by
kwc
close date 2012-02-29 07:53:18
Comments
It seems that the library doesn't provide the call, which shouldn't be. What system are you using? To verify its linked, you can VERBOSE=1 make, to show compiler lines.
dornhege
(
2011-08-12 02:04:43 -0500
)edit
BTW: You don't need the export in the manifest. That is for other packages using libraries that you build.
dornhege
(
2011-08-12 02:06:17 -0500
)edit
you can try running "nm libdssp_rs232_drive_module.so |grep dssp_rs232_drv_module_create" to see if that symbol is available in your library
Markus Achtelik
(
2011-09-02 12:05:33 -0500
)editadd a comment
