Determining if the pthread_create exist failed with the following output:
Change Dir: /home/mice/Grid/MAUS-v2.8.5/third_party/build/root_v5.34.36/CMakeFiles/CMakeTmp

Run Build Command:"/usr/bin/gmake" "cmTC_ed1c4/fast"
/usr/bin/gmake -f CMakeFiles/cmTC_ed1c4.dir/build.make CMakeFiles/cmTC_ed1c4.dir/build
gmake[1]: Entering directory `/home/mice/Grid/MAUS-v2.8.5/third_party/build/root_v5.34.36/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_ed1c4.dir/CheckSymbolExists.c.o
/home/mice/Grid/MAUS-v2.8.5/third_party/install/bin/gcc     -o CMakeFiles/cmTC_ed1c4.dir/CheckSymbolExists.c.o   -c /home/mice/Grid/MAUS-v2.8.5/third_party/build/root_v5.34.36/CMakeFiles/CMakeTmp/CheckSymbolExists.c
Linking C executable cmTC_ed1c4
/home/mice/Grid/MAUS-v2.8.5/third_party/install/bin/cmake -E cmake_link_script CMakeFiles/cmTC_ed1c4.dir/link.txt --verbose=1
/home/mice/Grid/MAUS-v2.8.5/third_party/install/bin/gcc       CMakeFiles/cmTC_ed1c4.dir/CheckSymbolExists.c.o  -o cmTC_ed1c4 -rdynamic 
CMakeFiles/cmTC_ed1c4.dir/CheckSymbolExists.c.o: In function `main':
CheckSymbolExists.c:(.text+0x16): undefined reference to `pthread_create'
collect2: error: ld returned 1 exit status
gmake[1]: *** [cmTC_ed1c4] Error 1
gmake[1]: Leaving directory `/home/mice/Grid/MAUS-v2.8.5/third_party/build/root_v5.34.36/CMakeFiles/CMakeTmp'
gmake: *** [cmTC_ed1c4/fast] Error 2

File /home/mice/Grid/MAUS-v2.8.5/third_party/build/root_v5.34.36/CMakeFiles/CMakeTmp/CheckSymbolExists.c:
/* */
#include <pthread.h>

int main(int argc, char** argv)
{
  (void)argv;
#ifndef pthread_create
  return ((int*)(&pthread_create))[argc];
#else
  (void)argc;
  return 0;
#endif
}

Determining if the function pthread_create exists in the pthreads failed with the following output:
Change Dir: /home/mice/Grid/MAUS-v2.8.5/third_party/build/root_v5.34.36/CMakeFiles/CMakeTmp

Run Build Command:"/usr/bin/gmake" "cmTC_88dd7/fast"
/usr/bin/gmake -f CMakeFiles/cmTC_88dd7.dir/build.make CMakeFiles/cmTC_88dd7.dir/build
gmake[1]: Entering directory `/home/mice/Grid/MAUS-v2.8.5/third_party/build/root_v5.34.36/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_88dd7.dir/CheckFunctionExists.c.o
/home/mice/Grid/MAUS-v2.8.5/third_party/install/bin/gcc    -DCHECK_FUNCTION_EXISTS=pthread_create   -o CMakeFiles/cmTC_88dd7.dir/CheckFunctionExists.c.o   -c /home/mice/Grid/MAUS-v2.8.5/third_party/install/share/cmake-3.5/Modules/CheckFunctionExists.c
Linking C executable cmTC_88dd7
/home/mice/Grid/MAUS-v2.8.5/third_party/install/bin/cmake -E cmake_link_script CMakeFiles/cmTC_88dd7.dir/link.txt --verbose=1
/home/mice/Grid/MAUS-v2.8.5/third_party/install/bin/gcc   -DCHECK_FUNCTION_EXISTS=pthread_create    CMakeFiles/cmTC_88dd7.dir/CheckFunctionExists.c.o  -o cmTC_88dd7 -rdynamic -lpthreads 
/usr/bin/ld: cannot find -lpthreads
collect2: error: ld returned 1 exit status
gmake[1]: *** [cmTC_88dd7] Error 1
gmake[1]: Leaving directory `/home/mice/Grid/MAUS-v2.8.5/third_party/build/root_v5.34.36/CMakeFiles/CMakeTmp'
gmake: *** [cmTC_88dd7/fast] Error 2