Performing C SOURCE FILE Test CMAKE_HAVE_LIBC_PTHREAD failed with the following output: Change Dir: /home/autobuild/autobuild/instance-12/output-1/build/luvi-2.13.0/CMakeFiles/CMakeTmp Run Build Command(s):/usr/bin/gmake -f Makefile cmTC_24ba6/fast && gmake[1]: Entering directory '/home/autobuild/autobuild/instance-12/output-1/build/luvi-2.13.0/CMakeFiles/CMakeTmp' /usr/bin/gmake -f CMakeFiles/cmTC_24ba6.dir/build.make CMakeFiles/cmTC_24ba6.dir/build gmake[2]: Entering directory '/home/autobuild/autobuild/instance-12/output-1/build/luvi-2.13.0/CMakeFiles/CMakeTmp' Building C object CMakeFiles/cmTC_24ba6.dir/src.c.o /home/autobuild/autobuild/instance-12/output-1/host/bin/aarch64_be-none-linux-gnu-gcc --sysroot=/home/autobuild/autobuild/instance-12/output-1/host/aarch64_be-buildroot-linux-gnu/sysroot -DCMAKE_HAVE_LIBC_PTHREAD -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -O1 -g0 -DNDEBUG -o CMakeFiles/cmTC_24ba6.dir/src.c.o -c /home/autobuild/autobuild/instance-12/output-1/build/luvi-2.13.0/CMakeFiles/CMakeTmp/src.c Linking C executable cmTC_24ba6 /home/autobuild/autobuild/instance-12/output-1/host/bin/cmake -E cmake_link_script CMakeFiles/cmTC_24ba6.dir/link.txt --verbose=1 /home/autobuild/autobuild/instance-12/output-1/host/bin/aarch64_be-none-linux-gnu-gcc --sysroot=/home/autobuild/autobuild/instance-12/output-1/host/aarch64_be-buildroot-linux-gnu/sysroot -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -O1 -g0 -DNDEBUG CMakeFiles/cmTC_24ba6.dir/src.c.o -o cmTC_24ba6 /home/autobuild/autobuild/instance-12/output-1/host/opt/ext-toolchain/bin/../lib/gcc/aarch64_be-none-linux-gnu/10.3.1/../../../../aarch64_be-none-linux-gnu/bin/ld: CMakeFiles/cmTC_24ba6.dir/src.c.o: in function `main': src.c:(.text+0x20): undefined reference to `pthread_create' /home/autobuild/autobuild/instance-12/output-1/host/opt/ext-toolchain/bin/../lib/gcc/aarch64_be-none-linux-gnu/10.3.1/../../../../aarch64_be-none-linux-gnu/bin/ld: src.c:(.text+0x28): undefined reference to `pthread_detach' /home/autobuild/autobuild/instance-12/output-1/host/opt/ext-toolchain/bin/../lib/gcc/aarch64_be-none-linux-gnu/10.3.1/../../../../aarch64_be-none-linux-gnu/bin/ld: src.c:(.text+0x30): undefined reference to `pthread_cancel' /home/autobuild/autobuild/instance-12/output-1/host/opt/ext-toolchain/bin/../lib/gcc/aarch64_be-none-linux-gnu/10.3.1/../../../../aarch64_be-none-linux-gnu/bin/ld: src.c:(.text+0x3c): undefined reference to `pthread_join' collect2: error: ld returned 1 exit status gmake[2]: *** [CMakeFiles/cmTC_24ba6.dir/build.make:99: cmTC_24ba6] Error 1 gmake[2]: Leaving directory '/home/autobuild/autobuild/instance-12/output-1/build/luvi-2.13.0/CMakeFiles/CMakeTmp' gmake[1]: *** [Makefile:127: cmTC_24ba6/fast] Error 2 gmake[1]: Leaving directory '/home/autobuild/autobuild/instance-12/output-1/build/luvi-2.13.0/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/autobuild/autobuild/instance-12/output-1/build/luvi-2.13.0/CMakeFiles/CMakeTmp Run Build Command(s):/usr/bin/gmake -f Makefile cmTC_eb391/fast && gmake[1]: Entering directory '/home/autobuild/autobuild/instance-12/output-1/build/luvi-2.13.0/CMakeFiles/CMakeTmp' /usr/bin/gmake -f CMakeFiles/cmTC_eb391.dir/build.make CMakeFiles/cmTC_eb391.dir/build gmake[2]: Entering directory '/home/autobuild/autobuild/instance-12/output-1/build/luvi-2.13.0/CMakeFiles/CMakeTmp' Building C object CMakeFiles/cmTC_eb391.dir/CheckFunctionExists.c.o /home/autobuild/autobuild/instance-12/output-1/host/bin/aarch64_be-none-linux-gnu-gcc --sysroot=/home/autobuild/autobuild/instance-12/output-1/host/aarch64_be-buildroot-linux-gnu/sysroot -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -O1 -g0 -DCHECK_FUNCTION_EXISTS=pthread_create -DNDEBUG -o CMakeFiles/cmTC_eb391.dir/CheckFunctionExists.c.o -c /home/autobuild/autobuild/instance-12/output-1/host/share/cmake-3.22/Modules/CheckFunctionExists.c Linking C executable cmTC_eb391 /home/autobuild/autobuild/instance-12/output-1/host/bin/cmake -E cmake_link_script CMakeFiles/cmTC_eb391.dir/link.txt --verbose=1 /home/autobuild/autobuild/instance-12/output-1/host/bin/aarch64_be-none-linux-gnu-gcc --sysroot=/home/autobuild/autobuild/instance-12/output-1/host/aarch64_be-buildroot-linux-gnu/sysroot -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -O1 -g0 -DCHECK_FUNCTION_EXISTS=pthread_create -DNDEBUG CMakeFiles/cmTC_eb391.dir/CheckFunctionExists.c.o -o cmTC_eb391 -lpthreads /home/autobuild/autobuild/instance-12/output-1/host/opt/ext-toolchain/bin/../lib/gcc/aarch64_be-none-linux-gnu/10.3.1/../../../../aarch64_be-none-linux-gnu/bin/ld: cannot find -lpthreads collect2: error: ld returned 1 exit status gmake[2]: *** [CMakeFiles/cmTC_eb391.dir/build.make:99: cmTC_eb391] Error 1 gmake[2]: Leaving directory '/home/autobuild/autobuild/instance-12/output-1/build/luvi-2.13.0/CMakeFiles/CMakeTmp' gmake[1]: *** [Makefile:127: cmTC_eb391/fast] Error 2 gmake[1]: Leaving directory '/home/autobuild/autobuild/instance-12/output-1/build/luvi-2.13.0/CMakeFiles/CMakeTmp'