ERROR: /home/pi/mediapipe/mediapipe/examples/desktop/hello_world/BUILD:19:1: Linking of rule '//mediapipe/examples/desktop/hello_world:hello_world' failed (Exit 1) gcc failed: error executing command /usr/bin/gcc @bazel-out/arm-fastbuild/bin/mediapipe/examples/desktop/hello_world/hello_world-2.params

Use --sandbox_debug to see verbose messages from the sandbox bazel-out/arm-fastbuild/bin/mediapipe/framework/_objs/calculator_graph/scheduler.pic.o:scheduler.cc:function std::__atomic_base<long long>::operator=(long long): error: undefined reference to '__atomic_store_8' bazel-out/arm-fastbuild/bin/mediapipe/framework/_objs/calculator_graph/scheduler.pic.o:scheduler.cc:function std::__atomic_base<long long>::operator long long() const: error: undefined reference to '__atomic_load_8' bazel-out/arm-fastbuild/bin/mediapipe/framework/_objs/scheduler_queue/scheduler_queue.pic.o:scheduler_queue.cc:function mediapipe::internal::SchedulerTimer::EndNode(long long): error: undefined reference to '__atomic_fetch_add_8' bazel-out/arm-fastbuild/bin/external/com_google_protobuf/_objs/protobuf_lite/arena.pic.o:arena.cc:function google::protobuf::internal::ArenaImpl::Init(): error: undefined reference to '__atomic_fetch_add_8' bazel-out/arm-fastbuild/bin/external/com_google_absl/absl/base/_objs/spinlock_wait/spinlock_wait.pic.o:spinlock_wait.cc:function absl::base_internal::SpinLockSuggestedDelayNS(int): error: undefined reference to '__atomic_load_8' bazel-out/arm-fastbuild/bin/external/com_google_absl/absl/base/_objs/spinlock_wait/spinlock_wait.pic.o:spinlock_wait.cc:function absl::base_internal::SpinLockSuggestedDelayNS(int): error: undefined reference to '__atomic_store_8' collect2: error: ld returned 1 exit status Target //mediapipe/examples/desktop/hello_world:hello_world failed to build Use --verbose_failures to see the command lines of failed build steps. INFO: Elapsed time: 917.881s, Critical Path: 776.57s INFO: 440 processes: 440 linux-sandbox. FAILED: Build did NOT complete successfully FAILED: Build did NOT complete successfully

Any idea what's causing this? I'm puzzled.

Linux raspberrypi 4.19.75-v7l+ #1270 SMP Tue Sep 24 18:51:41 BST 2019 armv7l GNU/Linux

Hi, we haven't tested MediaPipe on Raspberry Pi yet. Therefore, we can't guarantee that MediaPipe works on Raspberry Pi. From the error message, it seems to be a linker issue regarding libatomic. You can append --linkopt=-latomic to the Bazel command to see if it fixes the problem.