Dreaded linker error. Boost and catkin_make

edit

Hey there, I am creating my own package with Boost, and I have a .cpp file that is able to compile using g++ with:

g++ newboost.cpp -o boost -lboost_system -lpthread

But, when I try to put the .cpp file into my package and catkin_make my package, I get the following error:

/usr/bin/ld: CMakeFiles/keyencelaser_node.dir/src/newboost.cpp.o: undefined reference to symbol 'pthread_create@@GLIBC_2.2.5'
//lib/x86_64-linux-gnu/libpthread.so.0: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status
keyencelaser/CMakeFiles/keyencelaser_node.dir/build.make:95: recipe for target '/home/ateator/catkin_ws/devel/lib/keyencelaser/keyencelaser_node' failed
make[2]: *** [/home/ateator/catkin_ws/devel/lib/keyencelaser/keyencelaser_node] Error 1
CMakeFiles/Makefile2:4463: recipe for target 'keyencelaser/CMakeFiles/keyencelaser_node.dir/all' failed
make[1]: *** [keyencelaser/CMakeFiles/keyencelaser_node.dir/all] Error 2
Makefile:138: recipe for target 'all' failed

which is a similar error to the one I got before adding the flags onto the g++ terminal command

I have tried to add Boost into my CMakeLists.txt, but (although it did improve my errors), I am still left with the above errors. My CMakeLists.txt is:

find_package(catkin REQUIRED COMPONENTS
  roscpp

)
find_package(
  Boost
  REQUIRED COMPONENTS system thread
)
include_directories(
  ${catkin_INCLUDE_DIRS}
)
 add_executable(keyencelaser_node src/newboost.cpp)
 target_link_libraries(keyencelaser_node
   ${Boost_FILESYSTEM_LIBRARIES}
   ${Boost_SYSTEM_LIBRARY}
 )

I am pretty sure it's a linker error but I don't know how to fix it. Again, the edits I made to my CMakeLists.txt eliminated a lot of "undefined reference to" errors, but now that those are gone, I am left with the above. I appreciate any and all help.

Thank you.