Compiling with GCC6?

ArduCopter Copter 3.4
1

Anyone done this? Ubuntu on Windows 10 does not support 32bit executables so I am stuck trying to use 64bit executables which means the very latest arm compiler.

It all gets quite far until:
CXX: /mnt/i/github/ardupilot-dist/modules/PX4Firmware/src/modules/uORB/uORBDevices_nuttx.cpp
In file included from /opt/gcc-arm-none-eabi-6-2017-q1-update/arm-none-eabi/include/c++/6.3.1/string:52:0,
from /mnt/i/github/ardupilot-dist/modules/PX4Firmware/src/modules/uORB/uORBUtils.hpp:37,
from /mnt/i/github/ardupilot-dist/modules/PX4Firmware/src/modules/uORB/uORBDevices_nuttx.cpp:40:
/opt/gcc-arm-none-eabi-6-2017-q1-update/arm-none-eabi/include/c++/6.3.1/bits/basic_string.h: In function ‘float std::__cxx11::stof(const string&, size_t*)’:
/opt/gcc-arm-none-eabi-6-2017-q1-update/arm-none-eabi/include/c++/6.3.1/bits/basic_string.h:5454:31: error: ‘strtof’ is not a member of ‘std’
{ return __gnu_cxx::__stoa(&std::strtof, “stof”, __str.c_str(), __idx); }
^~~
compilation terminated due to -Wfatal-errors.
make[3]: *** [uORBDevices_nuttx.cpp.o] Error 1

Will I have better luck with master or is this a pointless exercise?

andy

2

I have the same problem compiling rover on Fedora 25 with arm-none-eabi 6.2.0 so you are not alone.
I am compiling the latest git master branch too.

3

There is a 64-bit version of the ARM GCC 4.9. Look at step 10 in http://ardupilot.org/dev/docs/building-ardupilot-onwindows10.html#setup-ardupilot-dev-enviromment-for-ubuntu-bash-on-windows-10

GCC 6 isn’t supported for now in ArduPilot.

4

Thanks! I shall try that.

6

The repository for that 64-bit version of the ARM GCC 4.9 is no longer available. Currently, I get the same error message as Andy, because I was left with installing gcc6, when I followed the instructions on the link pointed to by OXINARF.
Thanks in advance for help!

7

Alberto, not sure what repository you are referring to where arm gcc 4.9 is not available. But check step 9 of http://ardupilot.org/dev/docs/building-ardupilot-onwindows10.html#setup-ardupilot-dev-enviromment-for-ubuntu-bash-on-windows-10

it will get you the right compiler.
Specifically:

sudo add-apt-repository ppa:terry.guo/gcc-arm-embedded
sudo apt-get update
sudo apt-get install gcc-arm-none-eabi=4.9.3.2015q3-1trusty1

sudo apt-get update
sudo apt-get upgrade

8

EDIT: That said [see below], I was able to successfully build the latest version of ArduPilot for Plane using the latest GCC (sudo apt-get install gcc-arm-none-eabi)

Unfortunately, that’s just the issue.
That version is no longer available from the quoted repository.

See output below:

The repository seems to have a couple other issues:

image.png810×578 17.3 KB

9

Hi, did you encounter any errors as mentioned by OP? i.e. 'strtof' is not a member of 'std' etc. ? If so, how did you solve it?? I’m trying to compile with the latest GCC as well, would greatly appreciate your help!

10

I didn’t encounter any hard errors, though there are warnings throughout.
I followed the standard WSL + waf guide pretty much to the letter: http://ardupilot.org/dev/docs/building-ardupilot-onwindows10.html

The only difference was in step 9:
sudo add-apt-repository ppa:terry.guo/gcc-arm-embedded
sudo apt-get update
sudo apt-get install gcc-arm-none-eabi=4.9.3.2015q3-1trusty1

11

I’m running into errors with the suggestion from Evan110011, and the steps listed in on the doc page I listed all of my issues and errors over at the ardupilot wiki. I’m stumped and hoping there is an easy solution.

Thanks,
Jeremy