Performing C++ SOURCE FILE Test CMAKE_HAVE_LIBC_PTHREAD failed with the following output:
Change Dir: /home/iagschli/software/precice-2.2.1/CMakeFiles/CMakeTmp

Run Build Command(s):/usr/bin/gmake cmTC_91018/fast && /usr/bin/gmake -f CMakeFiles/cmTC_91018.dir/build.make CMakeFiles/cmTC_91018.dir/build
gmake[1]: Entering directory `/home/iagschli/software/precice-2.2.1/CMakeFiles/CMakeTmp'
Building CXX object CMakeFiles/cmTC_91018.dir/src.cxx.o
/opt/ohpc/pub/compiler/gcc/11.1.0/bin/g++    -DCMAKE_HAVE_LIBC_PTHREAD   -o CMakeFiles/cmTC_91018.dir/src.cxx.o -c /home/iagschli/software/precice-2.2.1/CMakeFiles/CMakeTmp/src.cxx
Linking CXX executable cmTC_91018
/opt/ohpc/pub/utils/cmake/3.15.4/bin/cmake -E cmake_link_script CMakeFiles/cmTC_91018.dir/link.txt --verbose=1
/opt/ohpc/pub/compiler/gcc/11.1.0/bin/g++   -DCMAKE_HAVE_LIBC_PTHREAD    CMakeFiles/cmTC_91018.dir/src.cxx.o  -o cmTC_91018 
CMakeFiles/cmTC_91018.dir/src.cxx.o: In function `main':
src.cxx:(.text+0x2d): undefined reference to `pthread_create'
src.cxx:(.text+0x39): undefined reference to `pthread_detach'
src.cxx:(.text+0x4a): undefined reference to `pthread_join'
src.cxx:(.text+0x5e): undefined reference to `pthread_atfork'
collect2: error: ld returned 1 exit status
gmake[1]: *** [cmTC_91018] Error 1
gmake[1]: Leaving directory `/home/iagschli/software/precice-2.2.1/CMakeFiles/CMakeTmp'
gmake: *** [cmTC_91018/fast] Error 2


Source file was:
#include <pthread.h>

void* test_func(void* data)
{
  return data;
}

int main(void)
{
  pthread_t thread;
  pthread_create(&thread, NULL, test_func, NULL);
  pthread_detach(thread);
  pthread_join(thread, NULL);
  pthread_atfork(NULL, NULL, NULL);
  pthread_exit(NULL);

  return 0;
}

Determining if the function pthread_create exists in the pthreads failed with the following output:
Change Dir: /home/iagschli/software/precice-2.2.1/CMakeFiles/CMakeTmp

Run Build Command(s):/usr/bin/gmake cmTC_340db/fast && /usr/bin/gmake -f CMakeFiles/cmTC_340db.dir/build.make CMakeFiles/cmTC_340db.dir/build
gmake[1]: Entering directory `/home/iagschli/software/precice-2.2.1/CMakeFiles/CMakeTmp'
Building CXX object CMakeFiles/cmTC_340db.dir/CheckFunctionExists.cxx.o
/opt/ohpc/pub/compiler/gcc/11.1.0/bin/g++    -DCHECK_FUNCTION_EXISTS=pthread_create   -o CMakeFiles/cmTC_340db.dir/CheckFunctionExists.cxx.o -c /home/iagschli/software/precice-2.2.1/CMakeFiles/CheckLibraryExists/CheckFunctionExists.cxx
Linking CXX executable cmTC_340db
/opt/ohpc/pub/utils/cmake/3.15.4/bin/cmake -E cmake_link_script CMakeFiles/cmTC_340db.dir/link.txt --verbose=1
/opt/ohpc/pub/compiler/gcc/11.1.0/bin/g++   -DCHECK_FUNCTION_EXISTS=pthread_create    CMakeFiles/cmTC_340db.dir/CheckFunctionExists.cxx.o  -o cmTC_340db -lpthreads 
/usr/bin/ld: cannot find -lpthreads
collect2: error: ld returned 1 exit status
gmake[1]: *** [cmTC_340db] Error 1
gmake[1]: Leaving directory `/home/iagschli/software/precice-2.2.1/CMakeFiles/CMakeTmp'
gmake: *** [cmTC_340db/fast] Error 2