The cmake generate step fails on my fresh install of BlueOS on a RPi4 doing the following:
sudo apt install build-essential cmake git
git clone https://github.com/mavlink/MAVSDK.git
cd MAVSDK
git submodule update --init --recursive
cmake -DCMAKE_BUILD_TYPE=Debug -Bbuild/default -H.
I also tried the following:
git checkout v2.12
gcc --version (result is g++ (Raspbian 10.2.1-6+rpi1) 10.2.1 20210110)
sudo apt upgrade
sudo apt install googletest
In all cases, I get the following error messages ( I never even got to compilation step:
cmake --build build/default
[100%] Built target gtest
-- Looking for pthread.h
-- Looking for pthread.h - found
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Failed
-- Looking for pthread_create in pthreads
-- Looking for pthread_create in pthreads - not found
-- Looking for pthread_create in pthread
-- Looking for pthread_create in pthread - found
-- Found Threads: TRUE
-- Found curl via config file: /home/pi/libtest/MAVSDK/build/default/third_party/install/lib/cmake/CURL
-- Looking for lzma_auto_decoder in /home/pi/libtest/MAVSDK/build/default/third_party/install/lib/liblzmad.a
-- Looking for lzma_auto_decoder in /home/pi/libtest/MAVSDK/build/default/third_party/install/lib/liblzmad.a - found
-- Looking for lzma_easy_encoder in /home/pi/libtest/MAVSDK/build/default/third_party/install/lib/liblzmad.a
-- Looking for lzma_easy_encoder in /home/pi/libtest/MAVSDK/build/default/third_party/install/lib/liblzmad.a - found
-- Looking for lzma_lzma_preset in /home/pi/libtest/MAVSDK/build/default/third_party/install/lib/liblzmad.a
-- Looking for lzma_lzma_preset in /home/pi/libtest/MAVSDK/build/default/third_party/install/lib/liblzmad.a - found
-- Found LibLZMA: /home/pi/libtest/MAVSDK/build/default/third_party/install/lib/liblzmad.a (found version "5.4.5")
-- All plugins enabled
-- Check if compiler accepts -pthread
-- Check if compiler accepts -pthread - yes
-- Found GTest: /home/pi/libtest/MAVSDK/build/default/third_party/install/lib/libgtest.a
-- BUILD_MAVSDK_SERVER not set: not building grpc mavsdk_server
-- Configuring done
CMake Error at src/integration_tests/CMakeLists.txt:5 (add_executable):
Target "integration_tests_runner" links to target "GTest::gmock" but the
target was not found. Perhaps a find_package() call is missing for an
IMPORTED target, or an ALIAS target is missing?
CMake Error at src/unit_tests/CMakeLists.txt:3 (add_executable):
Target "unit_tests_runner" links to target "GTest::gmock" but the target
was not found. Perhaps a find_package() call is missing for an IMPORTED
target, or an ALIAS target is missing?
CMake Error at src/system_tests/CMakeLists.txt:1 (add_executable):
Target "system_tests_runner" links to target "GTest::gmock" but the target
was not found. Perhaps a find_package() call is missing for an IMPORTED
target, or an ALIAS target is missing?
-- Generating done
CMake Generate step failed. Build files cannot be regenerated correctly.
actually, the compilation step did run, but also errored out:
[ 86%] Linking CXX executable system_tests_runner
/usr/bin/ld: cannot find -lGTest::gmock
collect2: error: ld returned 1 exit status
gmake[2]: *** [src/system_tests/CMakeFiles/system_tests_runner.dir/build.make:376: src/system_tests/system_tests_runner] Error 1
gmake[1]: *** [CMakeFiles/Makefile2:1097: src/system_tests/CMakeFiles/system_tests_runner.dir/all] Error 2
gmake[1]: *** Waiting for unfinished jobs....
[ 86%] Building CXX object src/unit_tests/CMakeFiles/unit_tests_runner.dir/__/mavsdk/plugins/mission_raw/mission_import_test.cpp.o
[ 87%] Building CXX object src/integration_tests/CMakeFiles/integration_tests_runner.dir/info.cpp.o
[ 87%] Building CXX object src/integration_tests/CMakeFiles/integration_tests_runner.dir/offboard_attitude.cpp.o
[ 87%] Building CXX object src/integration_tests/CMakeFiles/integration_tests_runner.dir/log_files.cpp.o
[ 88%] Building CXX object src/integration_tests/CMakeFiles/integration_tests_runner.dir/mission_cancellation.cpp.o
[ 88%] Building CXX object src/integration_tests/CMakeFiles/integration_tests_runner.dir/mission_change_speed.cpp.o
[ 89%] Building CXX object src/integration_tests/CMakeFiles/integration_tests_runner.dir/mission.cpp.o
[ 89%] Building CXX object src/integration_tests/CMakeFiles/integration_tests_runner.dir/mission_rtl.cpp.o
[ 90%] Building CXX object src/integration_tests/CMakeFiles/integration_tests_runner.dir/mission_raw_mission_changed.cpp.o
[ 90%] Building CXX object src/integration_tests/CMakeFiles/integration_tests_runner.dir/mission_raw_import_and_fly.cpp.o
[ 91%] Building CXX object src/integration_tests/CMakeFiles/integration_tests_runner.dir/mission_set_current.cpp.o
[ 92%] Linking CXX executable unit_tests_runner
/usr/bin/ld: cannot find -lGTest::gmock
collect2: error: ld returned 1 exit status
gmake[2]: *** [src/unit_tests/CMakeFiles/unit_tests_runner.dir/build.make:453: src/unit_tests/unit_tests_runner] Error 1
gmake[1]: *** [CMakeFiles/Makefile2:1070: src/unit_tests/CMakeFiles/unit_tests_runner.dir/all] Error 2
[ 92%] Building CXX object src/integration_tests/CMakeFiles/integration_tests_runner.dir/mission_transition.cpp.o
[ 93%] Building CXX object src/integration_tests/CMakeFiles/integration_tests_runner.dir/mission_takeoff_land.cpp.o
[ 93%] Building CXX object src/integration_tests/CMakeFiles/integration_tests_runner.dir/offboard_acceleration.cpp.o
[ 93%] Building CXX object src/integration_tests/CMakeFiles/integration_tests_runner.dir/offboard_velocity.cpp.o
[ 94%] Building CXX object src/integration_tests/CMakeFiles/integration_tests_runner.dir/offboard_position.cpp.o
[ 94%] Building CXX object src/integration_tests/CMakeFiles/integration_tests_runner.dir/param.cpp.o
[ 95%] Building CXX object src/integration_tests/CMakeFiles/integration_tests_runner.dir/path_checker.cpp.o
[ 95%] Building CXX object src/integration_tests/CMakeFiles/integration_tests_runner.dir/system_connection_async.cpp.o
[ 96%] Building CXX object src/integration_tests/CMakeFiles/integration_tests_runner.dir/system_multi_components.cpp.o
[ 96%] Building CXX object src/integration_tests/CMakeFiles/integration_tests_runner.dir/statustext.cpp.o
[ 97%] Building CXX object src/integration_tests/CMakeFiles/integration_tests_runner.dir/telemetry_async.cpp.o
[ 97%] Building CXX object src/integration_tests/CMakeFiles/integration_tests_runner.dir/telemetry_gps_origin.cpp.o
[ 98%] Building CXX object src/integration_tests/CMakeFiles/integration_tests_runner.dir/telemetry_health.cpp.o
[ 98%] Building CXX object src/integration_tests/CMakeFiles/integration_tests_runner.dir/telemetry_modes.cpp.o
[ 99%] Building CXX object src/integration_tests/CMakeFiles/integration_tests_runner.dir/telemetry_sync.cpp.o
[ 99%] Building CXX object src/integration_tests/CMakeFiles/integration_tests_runner.dir/mavlink_passthrough.cpp.o
[ 99%] Building CXX object src/integration_tests/CMakeFiles/integration_tests_runner.dir/mission_transfer_lossy.cpp.o
[100%] Linking CXX executable integration_tests_runner
/usr/bin/ld: cannot find -lGTest::gmock
collect2: error: ld returned 1 exit status
gmake[2]: *** [src/integration_tests/CMakeFiles/integration_tests_runner.dir/build.make:811: src/integration_tests/integration_tests_runner] Error 1
gmake[1]: *** [CMakeFiles/Makefile2:1016: src/integration_tests/CMakeFiles/integration_tests_runner.dir/all] Error 2
gmake: *** [Makefile:149: all] Error 2
I thought we fixed this here: Fix absl CI by JonasVautherin · Pull Request #2350 · mavlink/MAVSDK · GitHub
Also, any reason you don’t just want to install the release?
BlueOs is on 32 bit, so I blindly assumed that the binary wouldnt work.
32bit? 
probably won’t then, yes.
If you need a quick-fix, just disable all test targets in cmake: integration_tests, system_tests, unit_tests. Then there is a test it will just link.
Thanks for the discussion, its helpful. It caused me to double check my assumption, and as usual I was wrong. The BlueOS image I am using (v1.2.6 here Release 1.2.6 · bluerobotics/BlueOS · GitHub) is clearly aarch64. Sorry for the mixup, I will install the libmavsdk-dev binary and will hopefully be off and running.
1 Like
Turns out that I was wrong when I thought I was wrong. I was actually right, that BlueOS is 32 bit. Their uname -a command is misleading. But evidence from commands like lshw, file, and dpkg shows that it is 32 bit, armhf to be precise.
So I am back to square one, in which I have to fully build mavsdk in order to link the mavsdk/example code as well as build my own proxy in order to interface with the autopilot.
Hi Mike,
I was having this exact same issue. I did two things and I honestly am not sure which one made it work
This is my updated cmake call
cmake -DCMAKE_BUILD_TYPE=Debug -DBUILD_TESTS=OFF -Bbuild/default -H.
And I removed my apt installation of googletest and libgtest-dev
MAVSDK Main Branch: GTest::gmock Target Not Found Error
Hello,
I am trying to build the MAVSDK main branch on an RPi4, but I am encountering the following errors:
-- All plugins enabled
-- BUILD_MAVSDK_SERVER not set: not building grpc mavsdk_server
-- Configuring done
CMake Error at src/integration_tests/CMakeLists.txt:5 (add_executable):
Target "integration_tests_runner" links to target "GTest::gmock" but the target was not found. Perhaps a find_package() call is missing for an IMPORTED target, or an ALIAS target is missing?
CMake Error at src/unit_tests/CMakeLists.txt:3 (add_executable):
Target "unit_tests_runner" links to target "GTest::gmock" but the target was not found. Perhaps a find_package() call is missing for an IMPORTED target, or an ALIAS target is missing?
CMake Error at src/system_tests/CMakeLists.txt:1 (add_executable):
Target "system_tests_runner" links to target "GTest::gmock" but the target was not found. Perhaps a find_package() call is missing for an IMPORTED target, or an ALIAS target is missing?
-- Generating done
CMake Generate step failed. Build files cannot be regenerated correctly.
I have enabled the BUILD_TESTING=ON flag and ensured that the libgtest-dev package is installed on the system. However, it seems that CMake cannot find the GTest::gmock target.
Could you help me resolve this error? I have also set up GTest, but the issue persists.
Thank you in advance!
Do you need the tests? Why don’t you just disable them using -DBUILD_TESTING=OFF?
And why are you building it in the first place? You can just get the mavsdk_server binary from, e.g.:
https://github.com/mavlink/MAVSDK/releases/download/v2.12.12/mavsdk_server_musl_x86_64
1 Like
Julian, please read the posts. I was clear that I have a 32-bit OS. To my knowledge, this is the only, or at least the primary, environment allowed by BlueRobotics.
Or did you mean to include a URL to a download for a 32bit library.
Oh, I’m sorry, I missed that when I came back to this thread. It’s all very confusing to be honest. That’s what happens when someone necrobumps threads with “I have the same issue” just because they see vagely the same error.
@MikeFair I assume your issue is resolved in the meantime, or do you still need a solution?
