[CMake] Linking against boost_Test fails

[Michael Hertling]

On 06/21/2010 10:19 PM, Oswin Krause wrote:
>> On 06/21/2010 04:53 PM, Oswin Krause wrote:
>>> Hello everybody,
>>>
>>> I am currently trying to write a cmake script for my testcases. Previously i used a command like this:
>>>
>>> g++ test.cpp -lboost_test_exec_monitor-mt -L/path/to/lib/ -lshark -I/path/to/include
>>>
>>> and everything worked fine.
>>> Now i'm using the following macro:
>>>
>>> MACRO( SHARK_ADD_TEST SRC NAME)
>>>
>>>     ADD_EXECUTABLE( ${NAME}
>>>         ${SRC}
>>>     )
>>>
>>>     SET( LINK_LIBRARIES
>>>         ${Boost_TEST_EXEC_MONITOR_LIBRARY}
>>>         shark
>>>     )
>>>     TARGET_LINK_LIBRARIES( ${NAME} ${LINK_LIBRARIES} )
>>>
>>>     ADD_TEST( ${NAME} ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/Test/${NAME} )
>>> ENDMACRO()
>>> SHARK_ADD_TEST( LinAlg/test.cpp LinAlg_test )
>>>
>>> And this creates the following commands:
>>> /usr/bin/c++ -D_CRT_SECURE_NO_WARNINGS -DBOOST_ALL_DYN_LINK -I/path/to/include -o /some/path/test.o -c path/to/test/test.cpp
>>>
>>> /usr/bin/c++ /some/path/test.o -o /path/to/bin -rdynamic -Wl,-Bstatic -lboost_test_exec_monitor-mt 
>>> -Wl,-Bdynamic /path/to/lib/libshark.so.2.3.0 -Wl,-rpath,/path/to/lib
>>>
>>> and the error:
>>> undefined reference to 'boost::unit_test::unit_test_main(bool (*)(),int,char**)'
>>>
>>> So cmake finds the correct library, but seems to link wrong.
>>> How can i fix that?
>>
>> Usually, this means you have a reference of your libshark.so.2.3.0 to
>> libboost_test_exec_monitor-mt.a, but in this case, your manually set up
>> link line wouldn't work, too, so are you sure that line works as you've
>> presented it, i.e. with -lboost_test_exec_monitor-mt before -lshark?
> Yes, it is exactly this:
> g++ cblnsrch.cpp -lboost_test_exec_monitor-mt 
> -L/home/oswin/Projekte/Shark/shark-project/branches/SharkReworkBoostRng/Shark/lib/ -lshark 
> -I/home/oswin/Projekte/Shark/shark-project/branches/SharkReworkBoostRng/Shark/include/
> 
> But there is  currently no dependency between shark and boost, so the order shouldn't make a difference.
> 
>> Does SET(LINK_LIBRARIES shark ${Boost_TEST_EXEC_MONITOR_LIBRARY}),
>> i.e. shark-before-boost, work?
> Same result, unfortunately.
> 
>>
>> Another potential cause for such incidents is the use of different C++
>> compiler versions, so do you have multiple compilers installed, or do
>> you have multiple Boost installations, and how does libshark.so.2.3.0
>> get built?
> I'm building the tests with the same cmake Script as i'm currently trying to build the Tests.
> I checked the gcc versions. My gcc was quite old, 4.4.1 and boost was build with 4.4.3. But updating gcc to 4.4.5 didn't help either.
> And both are now the newest version of my distribution. 

Could you perhaps do the following:

1) Post the CMakeList.txt that generates the faulty link line.
2) Post the output of "make VERBOSE=1", so we can see the details.
3) After make has bailed out with the failure in linking, jump into the
   concerned directory, set up a working link line by hand and post it.

Don't forget to do an out-of-source build starting from within a clean
binary directory, and BTW, how do you enable Boost in CMakeLists.txt?

Regards,

Michael

P.S.: Which version of Boost do you use?