Error when executing make

[burumart]

I followed the instructions on the readme, but I'm facing an error, wich in all forums say it's because -l order issue, but I'm not familiar with cmake and I can't find where to fix it:

Linking C executable ../bin/raspividyuv
/usr/bin/ld: CMakeFiles/raspividyuv.dir/RaspiVidYUV.c.o: undefined reference to symbol 'sem_init@@GLIBC_2.4'
//lib/arm-linux-gnueabihf/libpthread.so.0: error adding symbols: DSO missing from command line
collect2: ld returned 1 exit status
CMakeFiles/raspividyuv.dir/build.make:165: recipe for target '../bin/raspividyuv' failed
make[2]: *** [../bin/raspividyuv] Error 1
CMakeFiles/Makefile2:60: recipe for target 'CMakeFiles/raspividyuv.dir/all' failed
make[1]: *** [CMakeFiles/raspividyuv.dir/all] Error 2
Makefile:72: recipe for target 'all' failed
make: *** [all] Error 2

It seems adding -lpthread to:
CMakeFiles/raspividyuv.dir/link.txt

worked.