During setup of catkin workspace i am getting this error: /usr/bin/ld: cannot find -lpthreads while executing catkin_make

please help!!!

Determining if the function pthread_create exists in the pthreads failed with the following output:
Change Dir: /home/devesh/ROS/catlin_workspace/build/CMakeFiles/CMakeTmp

Run Build Command:"/usr/bin/make" "cmTryCompileExec3515155321/fast"
/usr/bin/make -f CMakeFiles/cmTryCompileExec3515155321.dir/build.make CMakeFiles/cmTryCompileExec3515155321.dir/build
make[1]: Entering directory '/home/devesh/ROS/catlin_workspace/build/CMakeFiles/CMakeTmp'
/usr/bin/cmake -E cmake_progress_report /home/devesh/ROS/catlin_workspace/build/CMakeFiles/CMakeTmp/CMakeFiles 1
Building C object CMakeFiles/cmTryCompileExec3515155321.dir/CheckFunctionExists.c.o
/usr/bin/cc   -DCHECK_FUNCTION_EXISTS=pthread_create   -o CMakeFiles/cmTryCompileExec3515155321.dir/CheckFunctionExists.c.o   -c /usr/share/cmake-3.2/Modules/CheckFunctionExists.c
Linking C executable cmTryCompileExec3515155321
/usr/bin/cmake -E cmake_link_script CMakeFiles/cmTryCompileExec3515155321.dir/link.txt --verbose=1
/usr/bin/cc   -DCHECK_FUNCTION_EXISTS=pthread_create    CMakeFiles/cmTryCompileExec3515155321.dir/CheckFunctionExists.c.o  -o cmTryCompileExec3515155321 -rdynamic -lpthreads 
**/usr/bin/ld: cannot find -lpthreads**
collect2: error: ld returned 1 exit status
CMakeFiles/cmTryCompileExec3515155321.dir/build.make:88: recipe for target 'cmTryCompileExec3515155321' failed
make[1]: Leaving directory '/home/devesh/ROS/catlin_workspace/build/CMakeFiles/CMakeTmp'
make[1]: *** [cmTryCompileExec3515155321] Error 1
Makefile:117: recipe for target 'cmTryCompileExec3515155321/fast' failed
make: *** [cmTryCompileExec3515155321/fast] Error 2