Performing C SOURCE FILE Test CMAKE_HAVE_LIBC_PTHREAD failed with the following output: Change Dir: /home/giuliobenetti/autobuild/run/instance-3/output-1/build/host-gtest-1.12.0/CMakeFiles/CMakeTmp Run Build Command(s):/usr/bin/make -f Makefile cmTC_285cb/fast && make[1]: Entering directory '/home/giuliobenetti/autobuild/run/instance-3/output-1/build/host-gtest-1.12.0/CMakeFiles/CMakeTmp' /usr/bin/make -f CMakeFiles/cmTC_285cb.dir/build.make CMakeFiles/cmTC_285cb.dir/build make[2]: Entering directory '/home/giuliobenetti/autobuild/run/instance-3/output-1/build/host-gtest-1.12.0/CMakeFiles/CMakeTmp' Building C object CMakeFiles/cmTC_285cb.dir/src.c.o /usr/bin/gcc -DCMAKE_HAVE_LIBC_PTHREAD -O2 -I/home/giuliobenetti/autobuild/run/instance-3/output-1/host/include -o CMakeFiles/cmTC_285cb.dir/src.c.o -c /home/giuliobenetti/autobuild/run/instance-3/output-1/build/host-gtest-1.12.0/CMakeFiles/CMakeTmp/src.c Linking C executable cmTC_285cb /home/giuliobenetti/autobuild/run/instance-3/output-1/host/bin/cmake -E cmake_link_script CMakeFiles/cmTC_285cb.dir/link.txt --verbose=1 /usr/bin/gcc -O2 -I/home/giuliobenetti/autobuild/run/instance-3/output-1/host/include -L/home/giuliobenetti/autobuild/run/instance-3/output-1/host/lib -Wl,-rpath,/home/giuliobenetti/autobuild/run/instance-3/output-1/host/lib CMakeFiles/cmTC_285cb.dir/src.c.o -o cmTC_285cb /usr/bin/ld: CMakeFiles/cmTC_285cb.dir/src.c.o: in function `main': src.c:(.text.startup+0x29): undefined reference to `pthread_create' /usr/bin/ld: src.c:(.text.startup+0x32): undefined reference to `pthread_detach' /usr/bin/ld: src.c:(.text.startup+0x3b): undefined reference to `pthread_cancel' /usr/bin/ld: src.c:(.text.startup+0x46): undefined reference to `pthread_join' collect2: error: ld returned 1 exit status make[2]: *** [CMakeFiles/cmTC_285cb.dir/build.make:99: cmTC_285cb] Error 1 make[2]: Leaving directory '/home/giuliobenetti/autobuild/run/instance-3/output-1/build/host-gtest-1.12.0/CMakeFiles/CMakeTmp' make[1]: *** [Makefile:127: cmTC_285cb/fast] Error 2 make[1]: Leaving directory '/home/giuliobenetti/autobuild/run/instance-3/output-1/build/host-gtest-1.12.0/CMakeFiles/CMakeTmp' 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/giuliobenetti/autobuild/run/instance-3/output-1/build/host-gtest-1.12.0/CMakeFiles/CMakeTmp Run Build Command(s):/usr/bin/make -f Makefile cmTC_0dcfa/fast && make[1]: Entering directory '/home/giuliobenetti/autobuild/run/instance-3/output-1/build/host-gtest-1.12.0/CMakeFiles/CMakeTmp' /usr/bin/make -f CMakeFiles/cmTC_0dcfa.dir/build.make CMakeFiles/cmTC_0dcfa.dir/build make[2]: Entering directory '/home/giuliobenetti/autobuild/run/instance-3/output-1/build/host-gtest-1.12.0/CMakeFiles/CMakeTmp' Building C object CMakeFiles/cmTC_0dcfa.dir/CheckFunctionExists.c.o /usr/bin/gcc -O2 -I/home/giuliobenetti/autobuild/run/instance-3/output-1/host/include -DCHECK_FUNCTION_EXISTS=pthread_create -o CMakeFiles/cmTC_0dcfa.dir/CheckFunctionExists.c.o -c /home/giuliobenetti/autobuild/run/instance-3/output-1/host/share/cmake-3.22/Modules/CheckFunctionExists.c Linking C executable cmTC_0dcfa /home/giuliobenetti/autobuild/run/instance-3/output-1/host/bin/cmake -E cmake_link_script CMakeFiles/cmTC_0dcfa.dir/link.txt --verbose=1 /usr/bin/gcc -O2 -I/home/giuliobenetti/autobuild/run/instance-3/output-1/host/include -DCHECK_FUNCTION_EXISTS=pthread_create -L/home/giuliobenetti/autobuild/run/instance-3/output-1/host/lib -Wl,-rpath,/home/giuliobenetti/autobuild/run/instance-3/output-1/host/lib CMakeFiles/cmTC_0dcfa.dir/CheckFunctionExists.c.o -o cmTC_0dcfa -lpthreads /usr/bin/ld: cannot find -lpthreads collect2: error: ld returned 1 exit status make[2]: *** [CMakeFiles/cmTC_0dcfa.dir/build.make:99: cmTC_0dcfa] Error 1 make[2]: Leaving directory '/home/giuliobenetti/autobuild/run/instance-3/output-1/build/host-gtest-1.12.0/CMakeFiles/CMakeTmp' make[1]: *** [Makefile:127: cmTC_0dcfa/fast] Error 2 make[1]: Leaving directory '/home/giuliobenetti/autobuild/run/instance-3/output-1/build/host-gtest-1.12.0/CMakeFiles/CMakeTmp'