Performing C SOURCE FILE Test CMAKE_HAVE_LIBC_PTHREAD failed with the following output:
Change Dir: /home/nvidia/workspace/driveworks_3.5/samples/build/CMakeFiles/CMakeTmp

Run Build Command(s):/usr/bin/make cmTC_47c06/fast && /usr/bin/make  -f CMakeFiles/cmTC_47c06.dir/build.make CMakeFiles/cmTC_47c06.dir/build
make[1]: Entering directory '/home/nvidia/workspace/driveworks_3.5/samples/build/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_47c06.dir/src.c.o
/usr/bin/cc   -DCMAKE_HAVE_LIBC_PTHREAD -fPIE   -std=gnu99 -o CMakeFiles/cmTC_47c06.dir/src.c.o   -c /home/nvidia/workspace/driveworks_3.5/samples/build/CMakeFiles/CMakeTmp/src.c
Linking C executable cmTC_47c06
/usr/bin/cmake -E cmake_link_script CMakeFiles/cmTC_47c06.dir/link.txt --verbose=1
/usr/bin/cc  -DCMAKE_HAVE_LIBC_PTHREAD    CMakeFiles/cmTC_47c06.dir/src.c.o  -o cmTC_47c06 
CMakeFiles/cmTC_47c06.dir/src.c.o: In function `main':
src.c:(.text+0x3e): undefined reference to `pthread_create'
src.c:(.text+0x4a): undefined reference to `pthread_detach'
src.c:(.text+0x56): undefined reference to `pthread_cancel'
src.c:(.text+0x67): undefined reference to `pthread_join'
src.c:(.text+0x7b): undefined reference to `pthread_atfork'
collect2: error: ld returned 1 exit status
CMakeFiles/cmTC_47c06.dir/build.make:106: recipe for target 'cmTC_47c06' failed
make[1]: *** [cmTC_47c06] Error 1
make[1]: Leaving directory '/home/nvidia/workspace/driveworks_3.5/samples/build/CMakeFiles/CMakeTmp'
Makefile:141: recipe for target 'cmTC_47c06/fast' failed
make: *** [cmTC_47c06/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_cancel(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/nvidia/workspace/driveworks_3.5/samples/build/CMakeFiles/CMakeTmp

Run Build Command(s):/usr/bin/make cmTC_495f9/fast && /usr/bin/make  -f CMakeFiles/cmTC_495f9.dir/build.make CMakeFiles/cmTC_495f9.dir/build
make[1]: Entering directory '/home/nvidia/workspace/driveworks_3.5/samples/build/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_495f9.dir/CheckFunctionExists.c.o
/usr/bin/cc   -DCHECK_FUNCTION_EXISTS=pthread_create -fPIE   -std=gnu99 -o CMakeFiles/cmTC_495f9.dir/CheckFunctionExists.c.o   -c /usr/share/cmake-3.17/Modules/CheckFunctionExists.c
Linking C executable cmTC_495f9
/usr/bin/cmake -E cmake_link_script CMakeFiles/cmTC_495f9.dir/link.txt --verbose=1
/usr/bin/cc  -DCHECK_FUNCTION_EXISTS=pthread_create    CMakeFiles/cmTC_495f9.dir/CheckFunctionExists.c.o  -o cmTC_495f9  -lpthreads 
/usr/bin/ld: cannot find -lpthreads
collect2: error: ld returned 1 exit status
CMakeFiles/cmTC_495f9.dir/build.make:106: recipe for target 'cmTC_495f9' failed
make[1]: *** [cmTC_495f9] Error 1
make[1]: Leaving directory '/home/nvidia/workspace/driveworks_3.5/samples/build/CMakeFiles/CMakeTmp'
Makefile:141: recipe for target 'cmTC_495f9/fast' failed
make: *** [cmTC_495f9/fast] Error 2