Performing C SOURCE FILE Test CMAKE_HAVE_LIBC_PTHREAD failed with the following output: Change Dir: /home/cmhu/vpt_ascend_arm/3rdparty/gb28181_3rd/jthread-1.3.3/build/CMakeFiles/CMakeTmp Run Build Command(s):/usr/bin/make -f Makefile cmTC_2024b/fast && /usr/bin/make -f CMakeFiles/cmTC_2024b.dir/build.make CMakeFiles/cmTC_2024b.dir/build make[1]: Entering directory '/home/cmhu/vpt_ascend_arm/3rdparty/gb28181_3rd/jthread-1.3.3/build/CMakeFiles/CMakeTmp' Building C object CMakeFiles/cmTC_2024b.dir/src.c.o /usr/bin/cc -DCMAKE_HAVE_LIBC_PTHREAD -o CMakeFiles/cmTC_2024b.dir/src.c.o -c /home/cmhu/vpt_ascend_arm/3rdparty/gb28181_3rd/jthread-1.3.3/build/CMakeFiles/CMakeTmp/src.c Linking C executable cmTC_2024b /usr/local/bin/cmake -E cmake_link_script CMakeFiles/cmTC_2024b.dir/link.txt --verbose=1 /usr/bin/cc -rdynamic CMakeFiles/cmTC_2024b.dir/src.c.o -o cmTC_2024b /usr/bin/ld: CMakeFiles/cmTC_2024b.dir/src.c.o: in function `main': src.c:(.text+0x48): undefined reference to `pthread_create' /usr/bin/ld: src.c:(.text+0x50): undefined reference to `pthread_detach' /usr/bin/ld: src.c:(.text+0x58): undefined reference to `pthread_cancel' /usr/bin/ld: src.c:(.text+0x64): undefined reference to `pthread_join' collect2: error: ld returned 1 exit status make[1]: *** [CMakeFiles/cmTC_2024b.dir/build.make:99: cmTC_2024b] Error 1 make[1]: Leaving directory '/home/cmhu/vpt_ascend_arm/3rdparty/gb28181_3rd/jthread-1.3.3/build/CMakeFiles/CMakeTmp' make: *** [Makefile:127: cmTC_2024b/fast] Error 2 Source file was: #include static 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/cmhu/vpt_ascend_arm/3rdparty/gb28181_3rd/jthread-1.3.3/build/CMakeFiles/CMakeTmp Run Build Command(s):/usr/bin/make -f Makefile cmTC_fee4f/fast && /usr/bin/make -f CMakeFiles/cmTC_fee4f.dir/build.make CMakeFiles/cmTC_fee4f.dir/build make[1]: Entering directory '/home/cmhu/vpt_ascend_arm/3rdparty/gb28181_3rd/jthread-1.3.3/build/CMakeFiles/CMakeTmp' Building C object CMakeFiles/cmTC_fee4f.dir/CheckFunctionExists.c.o /usr/bin/cc -DCHECK_FUNCTION_EXISTS=pthread_create -o CMakeFiles/cmTC_fee4f.dir/CheckFunctionExists.c.o -c /usr/local/share/cmake-3.23/Modules/CheckFunctionExists.c Linking C executable cmTC_fee4f /usr/local/bin/cmake -E cmake_link_script CMakeFiles/cmTC_fee4f.dir/link.txt --verbose=1 /usr/bin/cc -DCHECK_FUNCTION_EXISTS=pthread_create -rdynamic CMakeFiles/cmTC_fee4f.dir/CheckFunctionExists.c.o -o cmTC_fee4f -lpthreads /usr/bin/ld: cannot find -lpthreads collect2: error: ld returned 1 exit status make[1]: *** [CMakeFiles/cmTC_fee4f.dir/build.make:99: cmTC_fee4f] Error 1 make[1]: Leaving directory '/home/cmhu/vpt_ascend_arm/3rdparty/gb28181_3rd/jthread-1.3.3/build/CMakeFiles/CMakeTmp' make: *** [Makefile:127: cmTC_fee4f/fast] Error 2