Doesn't work on non-FHS systems

[balsoft]

Bug Report

Current behavior

$ arduino-cli compile --fqbn arduino:avr:nano AnalogSensors/AnalogSensors.ino 
Error during build: build failed: fork/exec /home/balsoft/.arduino15/packages/arduino/tools/avr-gcc/7.3.0-atmel3.6.1-arduino5/bin/avr-g++: no such file or directory

The build fails because the toolchain (downloaded to ~/.arduino15/packages) has /lib/ld-linux-x86-64.so.2 set as interpreter. While it might work on FHS systems, it doesn't work on mine. I can solve this by patching the executables (for i in $(find /home/balsoft/.arduino15 -t file); do patchelf --set-interpreter /nix/store/xlxiw4rnxx2dksa91fizjzf7jb5nqghc-glibc-2.27/lib/ld-linux-x86-64.so.2 $i; done) but it is a flimsy solution and won't work long-term (it'll break after the next glibc update and garbage collection).

Expected behavior

It works out of the box, independent of the location of ld-linux-x86-64.so.2. This can be achieved by building the toolchain statically.

Environment

• CLI version (output of arduino-cli version): 0.0.0-git Commit: (in reality it's built from master branch) The expression is here: https://github.com/balsoft/nur-packages/tree/master/pkgs/arduino-cli
• OS and platform: NixOS GNU/Linux 20.03

Additional context

I'm not sure this should be reported here. If it isn't, please close the issue and redirect me to the correct place.

[facchinm]

Mmmh the toolchain is being built as statically as possible (for glibc), we could try compiling against musl in the future to solve this but it's not very high priority 🙂

[balsoft]

To fix my problem, we need to link the toolchain with --no-dynamic-linker which should work on all platforms that support binfmt (so all of them).

[ericonr]

Hi there! Do you think it would be possible instead to build musl variants and have arduino-cli auto detect the platform? Void Linux ships arduino-cli in its musl variant, but has to resort to gcompat in order to run the AVR compiler, and quite a few more hacks to run the SAM one. I recently dealt with this here void-linux/void-packages#22616 (comment)

Where can I find the build configuration, if I were to try and help with it?

[balsoft]

@ericonr https://github.com/balsoft/nur-packages/blob/master/pkgs/arduino-cli/default.nix is the package description. deps.nix is generated from go.sum or go.mod, don't remember which one.

[per1234]

Someone with write permission in the arduino/toolchain-avr repo (@facchinm, @cmaglie, ...), please transfer the issue over there. The issue doesn't seem to be anything that can be resolved by changing the Arduino CLI code base.

[SpenceKonde]

I saw this in my email, a growing sense of terror and dread,. as I saw owrds I firast assumed weretypos having never seen them before were repeated by multiple peop[le.

It was such a relief to find that it's not my problem yet. Whatever this problem is, may the technology gods have mercy on their soul.