# Unable to build px4 using rb5-flight-px4-build-docker Source: https://forum.modalai.com/topic/4160/unable-to-build-px4-using-rb5-flight-px4-build-docker Category: General Questions (https://forum.modalai.com/category/2/general-questions) Posted: 2025-02-09 22:33:27 UTC by Gary Holmgren Replies: 2 · Views: 967 ## Gary Holmgren · 2025-02-09 22:33:27 UTC So I followed the step to build the px4 docker [here](https://gitlab.com/voxl-public/rb5-flight/rb5-flight-px4-build-docker) with quite the hassle of installing hexigon 4.1.0.4 in a fresh ubuntu 20.04LTS VM. then tar that into the px4-docker project and build. I cloned the [voxl-px4](https://gitlab.com/voxl-public/voxl-sdk/services/voxl-px4/-/tree/dev?ref_type=heads) projec to run my new docker image ``` rb5-flight-px4-build-docker latest 0510293c3675 2 hours ago 8.09GB rb5-flight-px4-build-docker v1.5 0510293c3675 2 hours ago 8.09GB base-px4-build-docker v1.4 3095b633bdc3 21 months ago 2.03GB ``` as they built successfully. when checking out a stable release say v1.14.0-2.0.85 to test this new build and of course using ```git submodule update --init --recursive``` followed by ```./run-docker.sh``` >```/clean.sh``` >```./build.sh``` I end up with a failed build and am greeted with these errors. ``` root@0fcde4b59dca:/usr/local/workspace# ./build.sh *** Starting build *** Setting up the Hexagon SDK environment locally HEXAGON_SDK_ROOT is : /home/4.1.0.4 Setting up the QAIC binary for the platform make: Entering directory '/home/4.1.0.4/ipc/fastrpc/qaic' make: 'bin/qaic' is up to date. make: Leaving directory '/home/4.1.0.4/ipc/fastrpc/qaic' Could not find Androd ndk at /home/4.1.0.4/tools/android-ndk-r19c Please refer to /home/4.1.0.4/docs/tools/setup.html for installing the missed components *** Starting dependencies build *** -- The C compiler identification is GNU 7.5.0 -- The CXX compiler identification is GNU 9.4.0 -- Check for working C compiler: /home/4.1.0.4/tools/linaro64/bin/aarch64-linux-gnu-gcc -- Check for working C compiler: /home/4.1.0.4/tools/linaro64/bin/aarch64-linux-gnu-gcc -- works -- Detecting C compiler ABI info -- Detecting C compiler ABI info - done -- Detecting C compile features -- Detecting C compile features - done -- Check for working CXX compiler: /usr/bin/c++ -- Check for working CXX compiler: /usr/bin/c++ -- works -- Detecting CXX compiler ABI info -- Detecting CXX compiler ABI info - done -- Detecting CXX compile features -- Detecting CXX compile features - done -- Configuring done -- Generating done -- Build files have been written to: /usr/local/workspace/px4-firmware/boards/modalai/voxl2/libfc-sensor-api/build Scanning dependencies of target fc_sensor [ 50%] Building C object CMakeFiles/fc_sensor.dir/src/fc_sensor_stub.c.o [100%] Linking C shared library libfc_sensor.so [100%] Built target fc_sensor *** End of dependencies build *** *** Starting apps processor build *** -- PX4 version: v1.14.0-2.0.85-dev (1.14.0) -- Found PythonInterp: /usr/bin/python3 (found suitable version "3.8.10", minimum required is "3") -- PX4 config file: /usr/local/workspace/px4-firmware/boards/modalai/voxl2/default.px4board -- PLATFORM posix -- LINUX_TARGET y -- TOOLCHAIN aarch64-linux-gnu -- ROMFSROOT px4fmu_common -- ROOTFSDIR /data/px4 -- PX4 config: modalai_voxl2_default -- PX4 platform: posix -- PX4 lockstep: disabled -- The CXX compiler identification is GNU 7.5.0 -- The C compiler identification is GNU 7.5.0 -- The ASM compiler identification is GNU -- Found assembler: /home/4.1.0.4/tools/linaro64/bin/aarch64-linux-gnu-gcc -- Check for working CXX compiler: /home/4.1.0.4/tools/linaro64/bin/aarch64-linux-gnu-g++ -- Check for working CXX compiler: /home/4.1.0.4/tools/linaro64/bin/aarch64-linux-gnu-g++ -- works -- Detecting CXX compiler ABI info -- Detecting CXX compiler ABI info - done -- Detecting CXX compile features -- Detecting CXX compile features - done -- Check for working C compiler: /home/4.1.0.4/tools/linaro64/bin/aarch64-linux-gnu-gcc -- Check for working C compiler: /home/4.1.0.4/tools/linaro64/bin/aarch64-linux-gnu-gcc -- works -- Detecting C compiler ABI info -- Detecting C compiler ABI info - done -- Detecting C compile features -- Detecting C compile features - done -- cmake build type: RelWithDebInfo -- ccache enabled (export CCACHE_DISABLE=1 to disable) -- Skipping pwm file path /usr/local/workspace/px4-firmware/src/drivers/linux_pwm_out/module.yaml for VOXL2 -- Skipping pwm file path /usr/local/workspace/px4-firmware/src/drivers/pca9685_pwm_out/module.yaml for VOXL2 -- Skipping pwm file path /usr/local/workspace/px4-firmware/src/drivers/pwm_out/module.yaml for VOXL2 -- Skipping pwm file path /usr/local/workspace/px4-firmware/src/modules/simulation/pwm_out_sim/module_hil.yaml for VOXL2 -- Skipping pwm file path /usr/local/workspace/px4-firmware/src/modules/simulation/pwm_out_sim/module_sim.yaml for VOXL2 -- ROMFS: ROMFS/px4fmu_common Architecture: amd64 ==> CPACK_INSTALL_PREFIX = @DEB_INSTALL_PREFIX@ -- Configuring done -- Generating done -- Build files have been written to: /usr/local/workspace/px4-firmware/build/modalai_voxl2_default [0/562] git submodule src/modules/microdds_client/Micro-XRCE-DDS-Client [6/562] git submodule src/drivers/gps/devices [10/562] git submodule src/modules/mavlink/mavlink [269/562] Performing configure step for 'libmicroxrceddsclient_project' -- libmicroxrceddsclient_project configure command succeeded. See also /usr/local/workspace/px4-firmware/build/modalai_voxl2_default/src/modules/microdds_client/src/libmicroxrceddsclient_project-stamp/libmicroxrceddsclient_project-configure-*.log [383/562] Performing build step for 'libmicroxrceddsclient_project' -- libmicroxrceddsclient_project build command succeeded. See also /usr/local/workspace/px4-firmware/build/modalai_voxl2_default/src/modules/microdds_client/src/libmicroxrceddsclient_project-stamp/libmicroxrceddsclient_project-build-*.log [427/562] Performing install step for 'libmicroxrceddsclient_project' -- libmicroxrceddsclient_project install command succeeded. See also /usr/local/workspace/px4-firmware/build/modalai_voxl2_default/src/modules/microdds_client/src/libmicroxrceddsclient_project-stamp/libmicroxrceddsclient_project-install-*.log [562/562] Linking CXX executable bin/px4 /* Auto Magically Generated file */ /* Do not edit! */ #pragma once #define PX4_GIT_VERSION_STR "039064b897cf0a123bc1badb269e352186c8946d" #define PX4_GIT_VERSION_BINARY 0x039064b897cf0a12 #define PX4_GIT_TAG_STR "v1.14.0-2.0.85-dev" #define PX4_GIT_BRANCH_NAME "" #define PX4_GIT_OEM_VERSION_STR "" #define PX4_GIT_TAG_OR_BRANCH_NAME "v1.14.0-2.0.85-dev" // special variable: git tag, release or master branch #define MAVLINK_LIB_GIT_VERSION_STR "3ee5382d0c96134b0e1c250d8c2d54bfed0166fa" #define MAVLINK_LIB_GIT_VERSION_BINARY 0x3ee5382d0c96134b #define NUTTX_GIT_VERSION_STR "3f77354c0dc88793a47ff3b57595195ab45f7ba9" #define NUTTX_GIT_VERSION_BINARY 0x3f77354c0dc88793 #define NUTTX_GIT_TAG_STR "v11.0.0" *** End of apps processor build *** *** Starting qurt slpi build *** -- PX4 version: v1.14.0-2.0.85-dev (1.14.0) -- Found PythonInterp: /usr/bin/python3 (found suitable version "3.8.10", minimum required is "3") -- PX4 config file: /usr/local/workspace/px4-firmware/boards/modalai/voxl2-slpi/default.px4board -- PLATFORM qurt -- TOOLCHAIN qurt -- ROMFSROOT px4fmu_common -- PX4 config: modalai_voxl2-slpi_default -- PX4 platform: qurt -- The CXX compiler identification is Clang 10.0.0 -- The C compiler identification is Clang 10.0.0 -- The ASM compiler identification is unknown -- Found assembler: /home/4.1.0.4/tools/HEXAGON_Tools/8.4.05/Tools/bin/hexagon-clang -- Check for working CXX compiler: /home/4.1.0.4/tools/HEXAGON_Tools/8.4.05/Tools/bin/hexagon-clang++ -- Check for working CXX compiler: /home/4.1.0.4/tools/HEXAGON_Tools/8.4.05/Tools/bin/hexagon-clang++ -- broken CMake Error at /usr/share/cmake-3.16/Modules/CMakeTestCXXCompiler.cmake:53 (message): The C++ compiler "/home/4.1.0.4/tools/HEXAGON_Tools/8.4.05/Tools/bin/hexagon-clang++" is not able to compile a simple test program. It fails with the following output: Change Dir: /usr/local/workspace/px4-firmware/build/modalai_voxl2-slpi_default/CMakeFiles/CMakeTmp Run Build Command(s):/usr/bin/ninja cmTC_05fc1 && [1/2] Building CXX object CMakeFiles/cmTC_05fc1.dir/testCXXCompiler.cxx.o [2/2] Linking CXX executable cmTC_05fc1 FAILED: cmTC_05fc1 : && /home/4.1.0.4/tools/HEXAGON_Tools/8.4.05/Tools/bin/hexagon-clang++ -Wno-inconsistent-missing-override -DCONFIG_WCHAR_BUILTIN -D__CUSTOM_FILE_IO__ -mv66 -G0 -O3 -Wno-inconsistent-missing-override -DCONFIG_WCHAR_BUILTIN -D__CUSTOM_FILE_IO__ -mv66 -G0 -O3 -Wno-inconsistent-missing-override -DCONFIG_WCHAR_BUILTIN -D__CUSTOM_FILE_IO__ -mv66 -G0 -O3 -Wno-inconsistent-missing-override -DCONFIG_WCHAR_BUILTIN -D__CUSTOM_FILE_IO__ -mv66 -G0 -O3 -mv66 -mG0lib -G0 -fpic -shared -Wl,-Bsymbolic -Wl,--wrap=malloc -Wl,--wrap=calloc -Wl,--wrap=free -Wl,--wrap=realloc -Wl,--wrap=memalign -Wl,--wrap=__stack_chk_fail -Wl,/home/4.1.0.4/tools/HEXAGON_Tools/8.4.05/Tools/target/hexagon/lib/v66/G0/pic/libc++.a -lc -mv66 -mG0lib -G0 -fpic -shared -Wl,-Bsymbolic -Wl,--wrap=malloc -Wl,--wrap=calloc -Wl,--wrap=free -Wl,--wrap=realloc -Wl,--wrap=memalign -Wl,--wrap=__stack_chk_fail -Wl,/home/4.1.0.4/tools/HEXAGON_Tools/8.4.05/Tools/target/hexagon/lib/v66/G0/pic/libc++.a -lc CMakeFiles/cmTC_05fc1.dir/testCXXCompiler.cxx.o -o cmTC_05fc1 && : hexagon-clang++: error: unable to execute command: Executable "hexagon-link" doesn't exist! hexagon-clang++: error: hexagon-link command failed with exit code 1 (use -v to see invocation) ninja: build stopped: subcommand failed. CMake will not be able to correctly generate this project. Call Stack (most recent call first): CMakeLists.txt:219 (project) -- Configuring incomplete, errors occurred! See also "/usr/local/workspace/px4-firmware/build/modalai_voxl2-slpi_default/CMakeFiles/CMakeOutput.log". See also "/usr/local/workspace/px4-firmware/build/modalai_voxl2-slpi_default/CMakeFiles/CMakeError.log". Error: /usr/local/workspace/px4-firmware/build/modalai_voxl2-slpi_default is not a directory make: *** [Makefile:232: modalai_voxl2-slpi] Error 1 cat: build/modalai_voxl2-slpi_default/src/lib/version/build_git_version.h: No such file or directory *** End of qurt slpi build *** /usr/local/workspace User ID is 1000 Group ID is 1000 *** End of build *** ``` So as i followed the guides as EXACTLY as they described I am not sure whats going on with it and the tweaks I am trying are not working. Please let me know what I am missing here. Thanks! ## Reply by Gary Holmgren · 2025-02-10 00:40:42 UTC @Gary-Holmgren Was able to fix it with bash ```chmod +x /home/4.1.0.4/tools/HEXAGON_Tools/8.4.05/Tools/bin/ld.qcld``` (while in the docker image of course) It appeared hexagon-link was a symbolic link and making it executable fixed the target not having permissions. Hope this helps someone with a similar issue. ## Reply by garret · 2025-07-01 17:49:41 UTC (in reply to Gary Holmgren) @Gary-Holmgren you have saved at least one other person :pray: