'make px4_fmu-v4' fails - compilers not found

[jmalbert97]

I am attempting to simply build the firmware for a NuttX / PixHawk board, following the guide here: https://docs.px4.io/master/en/dev_setup/building_px4.html. I have the firmware cloned, the toolchains installed, but the build fails. I should note, when I build for JMavSim, it builds just fine. When I build for an actual NuttX target (I am using PixHawk 4) the build fails. I have tried adding environmental variables (verified with echo) to point to the paths for each compiler… but output is exactly the same, not even showing the path i entered. Here is my output:

joe@joe-ThinkPad-T440p:~/PX4-Autopilot$ sudo make px4_fmu-v4
-- PX4 version: v1.11.0-rc3-829-g3276916df9
-- PX4 config file: /home/joe/PX4-Autopilot/boards/px4/fmu-v4/default.cmake
-- PX4 config: px4_fmu-v4_default
-- PX4 platform: nuttx
-- cmake build type: MinSizeRel
-- The CXX compiler identification is unknown
-- The C compiler identification is unknown
-- The ASM compiler identification is unknown
-- Found assembler: arm-none-eabi-gcc
CMake Error at CMakeLists.txt:202 (project):
  The CMAKE_CXX_COMPILER:

    arm-none-eabi-g++

  is not a full path and was not found in the PATH.

  Tell CMake where to find the compiler by setting either the environment
  variable "CXX" or the CMake cache entry CMAKE_CXX_COMPILER to the full path
  to the compiler, or to the compiler name if it is in the PATH.

CMake Error at CMakeLists.txt:202 (project):
  The CMAKE_C_COMPILER:

    arm-none-eabi-gcc

  is not a full path and was not found in the PATH.

  Tell CMake where to find the compiler by setting either the environment
  variable "CC" or the CMake cache entry CMAKE_C_COMPILER to the full path to
  the compiler, or to the compiler name if it is in the PATH.

CMake Error at CMakeLists.txt:202 (project):
  The CMAKE_ASM_COMPILER:

    arm-none-eabi-gcc

  is not a full path and was not found in the PATH.

  Tell CMake where to find the compiler by setting either the environment
  variable "ASM" or the CMake cache entry CMAKE_ASM_COMPILER to the full path
  to the compiler, or to the compiler name if it is in the PATH.

-- Warning: Did not find file Compiler/-ASM
-- Configuring incomplete, errors occurred!
See also "/home/joe/PX4-Autopilot/build/px4_fmu-v4_default/CMakeFiles/CMakeOutput.log".
See also "/home/joe/PX4-Autopilot/build/px4_fmu-v4_default/CMakeFiles/CMakeError.log".
Error: /home/joe/PX4-Autopilot/build/px4_fmu-v4_default is not a directory
Makefile:224: recipe for target 'px4_fmu-v4' failed
make: *** [px4_fmu-v4] Error 1

My GCC version:

joe@joe-ThinkPad-T440p:~/PX4-Autopilot$ gcc --version
gcc (Ubuntu 7.5.0-3ubuntu1~18.04) 7.5.0
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

‘find -iname arm-none-eabi*’ output, showing these compilers do in fact exist (altough, seems like a weird place for them)

.......
./opt/gcc-arm-none-eabi-9-2020-q2-update/lib/gcc/arm-none-eabi
./opt/gcc-arm-none-eabi-9-2020-q2-update/bin/arm-none-eabi-elfedit
./opt/gcc-arm-none-eabi-9-2020-q2-update/bin/arm-none-eabi-gcc-ar
./opt/gcc-arm-none-eabi-9-2020-q2-update/bin/arm-none-eabi-g++
./opt/gcc-arm-none-eabi-9-2020-q2-update/bin/arm-none-eabi-ar
./opt/gcc-arm-none-eabi-9-2020-q2-update/bin/arm-none-eabi-strings
./opt/gcc-arm-none-eabi-9-2020-q2-update/bin/arm-none-eabi-c++
./opt/gcc-arm-none-eabi-9-2020-q2-update/bin/arm-none-eabi-c++filt
./opt/gcc-arm-none-eabi-9-2020-q2-update/bin/arm-none-eabi-gcc-9.3.1
./opt/gcc-arm-none-eabi-9-2020-q2-update/bin/arm-none-eabi-readelf
./opt/gcc-arm-none-eabi-9-2020-q2-update/bin/arm-none-eabi-addr2line
./opt/gcc-arm-none-eabi-9-2020-q2-update/bin/arm-none-eabi-gcc-ranlib
./opt/gcc-arm-none-eabi-9-2020-q2-update/bin/arm-none-eabi-ranlib
./opt/gcc-arm-none-eabi-9-2020-q2-update/bin/arm-none-eabi-cpp
./opt/gcc-arm-none-eabi-9-2020-q2-update/bin/arm-none-eabi-objcopy
./opt/gcc-arm-none-eabi-9-2020-q2-update/bin/arm-none-eabi-gcc
.......

Any guidance here would be appreciated. I am compiling on Ubuntu 18.04.

[dviresh93]

I would recommend running the setup script for your particular os. For ubuntu it is ./Tools/setup/ubuntu.sh it is possible that your compiler part is not linked properly and that script should fix it. Make sure to log out and log back in once you run that script.

[afwilkin]

I am experiencing this issue as well. The ubuntu.sh setup did not work for me.

Is there any update on this?

[afwilkin]

I found the issue. On the last version of PX4-autopilot I had to run with sudo because the program needed permission to create a cache file Failed to create temporary file for /home/atlas/.ccache/5/d/ec4da3686341d3d3968582736b61b9-11825.o.tmp.stdout: Permission denied

So, I simply ran with sudo. In this new version this seems to screw things up.

I am working on a fix, will update

[afwilkin]

Yeah, I am unsure why permissions on my folder /home/atlas/.ccache/5/d/ were set for only root use, but after changing the permissions there I was able to get a successful build

[julianoes]

I am experiencing this issue as well. The ubuntu.sh setup did not work for me.

Please paste the log of what did not work.

[jnomikos]

I ran into this issue today, and found out it was because I ran ubuntu.sh in Tools/setup with sudo, instead of as a normal user.

[superBaik]

Hi there, Even though I performed this process with "sudo', I m faced with the exactly same issus now. can I know there is any possible way to pass this error ?

thx in advance

[mcsauder]

Hi there, Even though I performed this process with "sudo', I m faced with the exactly same issus now. can I know there is any possible way to pass this error ?

thx in advance

reboot, update via sudo apt -y update reboot, and it might fix your issue. if not, then reboot again. If still not fixed, try

sudo apt -y update && sudo apt -y upgrade && sudo apt -y autoremove && sudo apt -y clean && sudo apt -y autoclean

If not fixed, post your new status.