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[ 12%] Building CXX object tests/CMakeFiles/perf_test_noalloc.dir/perf_test_noalloc.cpp.o
In file included from /home/students/slaufmann/Software/mc-fastflow/tests/perf_test_noalloc.cpp:34:0:
/home/students/slaufmann/Software/mc-fastflow/ff/mapping_utils.hpp: In function ‘long int ff_getThreadID()’:
/home/students/slaufmann/Software/mc-fastflow/ff/mapping_utils.hpp:37:37: error: ‘syscall’ was not declared in this scope
 #define gettid() syscall(__NR_gettid)
                                     ^
/home/students/slaufmann/Software/mc-fastflow/ff/mapping_utils.hpp:57:13: note: in expansion of macro ‘gettid’
     return  gettid();
             ^~~~~~
/home/students/slaufmann/Software/mc-fastflow/ff/mapping_utils.hpp: In function ‘int ff_setPriority(int)’:
/home/students/slaufmann/Software/mc-fastflow/ff/mapping_utils.hpp:37:37: error: ‘syscall’ was not declared in this scope
 #define gettid() syscall(__NR_gettid)
                                     ^
/home/students/slaufmann/Software/mc-fastflow/ff/mapping_utils.hpp:123:39: note: in expansion of macro ‘gettid’
         if (setpriority(PRIO_PROCESS, gettid(),priority_level) != 0) {
                                       ^~~~~~
/home/students/slaufmann/Software/mc-fastflow/ff/mapping_utils.hpp: In function ‘int ff_mapThreadToCpu(int, int)’:
/home/students/slaufmann/Software/mc-fastflow/ff/mapping_utils.hpp:37:37: error: ‘syscall’ was not declared in this scope
 #define gettid() syscall(__NR_gettid)
                                     ^
/home/students/slaufmann/Software/mc-fastflow/ff/mapping_utils.hpp:174:27: note: in expansion of macro ‘gettid’
     if (sched_setaffinity(gettid(), sizeof(mask), &mask) != 0)
                           ^~~~~~
make[2]: *** [tests/CMakeFiles/perf_test_noalloc.dir/build.make:63: tests/CMakeFiles/perf_test_noalloc.dir/perf_test_noalloc.cpp.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:281: tests/CMakeFiles/perf_test_noalloc.dir/all] Error 2
make: *** [Makefile:139: all] Error 2

[ 21%] Linking CXX executable mandelbrot_ff
/usr/lib/gcc/x86_64-pc-linux-gnu/6.3.0/../../../../x86_64-pc-linux-gnu/bin/ld: CMakeFiles/mandelbrot_ff.dir/renderthread.cpp.o: undefined reference to symbol 'pthread_create@@GLIBC_2.2.5'
/lib64/libpthread.so.0: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status
make[2]: *** [examples/qt-mandelbrot/fastflow/CMakeFiles/mandelbrot_ff.dir/build.make:211: examples/qt-mandelbrot/fastflow/mandelbrot_ff] Error 1
make[1]: *** [CMakeFiles/Makefile2:599: examples/qt-mandelbrot/fastflow/CMakeFiles/mandelbrot_ff.dir/all] Error 2
make: *** [Makefile:139: all] Error 2