Ubuntu 18.04 mis-compiles Klipper arm binaries

[khseal]

Updated to the latest version of the Klipper.
The extruder itself began to heat up.
Klipper is not connected to the microcontroller.
Add out folder and log.
klippy.log

out.zip

[khseal]

Returned to a stable version of Arduino Due does not respond =(

[khseal]

The problem is solved. Klipper is compiled without errors on Ubuntu 18.04 but does not work. Attention, the extruder is heated after flash the firmware!

[StefanMeGit]

That’s normal... Exchange the fan and extruder heater output. In this Case next Time just tue fan goes on instead of the heater.

[khseal]

Nothing normal. Normally everything is compiled under Ubuntu 16.04.
Problem in Ubuntu 18.04

[KevinOConnor]

Just so I understand, you're saying the micro-controller code compiles okay on Ubuntu 16.04, but is being mis-compiled on Ubuntu 18.04? If so, I'll take a look, but it will be some time before I can setup everything to test that. I do regularly test with newer versions of the toolchain (specifically the gcc versions that ship with Fedora) and I have not seen any problems.

-Kevin

[khseal]

Yes, you understood me correctly. Compile in Ubuntu 18.04 passed without errors and warnings, but the firmware does not work correctly. I attached my folder 'out'.
My version GCC 7.3.0

[PreownedFIN]

Just going through the issues and noticed this.

What expansion shield did you use?
It is a known problem with all mass manufactured RAMPS-FD shields that if the DUE doesn't have power, the heaters get turned on.
None of the sub-2.0 versions should be used anymore.
Due to the V1.0, 1.1 and 1.2 having the fatal problem, the 2.0 revision was never implemented and pretty much all RAMPS-FDs on the market have the problem.

bobc/bobc_hardware#19

[khseal]

I modified ramps 1.4. There is a heating problem in the absence of power supply at the Arduino DUE.

[KevinOConnor]

So, should this be closed then? (I haven't had a chance to test Ubuntu 18.04 myself.)

-Kevin

[khseal]

I will check the firmware on Ubuntu 18.04 in the near future. Initially, the problem was still because of the problem firmware. Heating the printer is a consequence of the configuration hardware and problem of firmware.

[khseal]

The problem with the firmware in version 18.04 is still present. I tried to flash on two laptops, as a result, after firmware, the microcontroller does not respond to requests.

[KevinOConnor]

I got a chance to install Ubuntu 18.04 and I can confirm that Klipper does not build arm binaries correctly on that OS. It appears the Ubuntu 18.04 gcc-arm-none-eabi and/or libnewlib-arm-none-eabi packages are linking in the wrong version of the libc functions. Instead of getting the thumb armv7-m C library we're getting a library for some other arm instruction set.

This does not appear to be a Klipper issue. It's not clear to me how to prevent Ubuntu from miscompiling Klipper. I recommend not compiling Klipper on Ubuntu 18.04.

Separately, I was able to build regular AVR binaries without issue. So, this appears limited to the arm toolset.

-Kevin

[khseal]

This is very bad. I installed almost in all computers lubuntu 18.04 =)

[KevinOConnor]

As of commit 50e9c67, Klipper will attempt to detect the broken compiler in Ubuntu 18.04 and produce an error message. It looks like there is an Ubuntu issue for it at: https://bugs.launchpad.net/ubuntu/+source/newlib/+bug/1767223

-Kevin

[KevinOConnor]

I'm going to close this issue as I think the recently added build time error checking addresses this (at least as best as we can).

-Kevin