GCC without build system

[jgromes]

Hi,

I'm trying to run CodeQL on of my repositories (https://github.com/jgromes/RadioLib), but I'm seeing the following error message:

No source code was seen during the build.

The workflow run in question can be found here: https://github.com/jgromes/RadioLib/runs/1055172671

I suspect this is due to the non-standard build process I'm using - the code is compiled using a command-line utility (arduino-cli), which internally uses avr-gcc. There's no use of build systems like cmake. The output is a GCC-compiled ELF file.

Is there something that's not configured correctly here, or is it required to use e.g. cmake or make to compile prior to CodeQL scan?

Thank you for any help or pointers.

[igfoo]

Hi jgromes,

The problem is caused by avr-g++ being executed directly from a statically linked binary. If you do something like

for i in ~/.arduino*/packages/arduino/tools/avr-gcc/*/bin/*; do mv "$i" "$i.real"; printf '#!/usr/bin/sh\nexec "'"$i"'.real" ${1+"$@"}\n' > "$i"; chmod +x "$i"; done

after arduino-cli core install arduino:avr then it should work around the problem.

[jgromes]

Thank you for the response - I tried just copy-pasting it (like the noob that I am), but the build step then fails with

Error during build: fork/exec /home/runner/.arduino15/packages/arduino/tools/avr-gcc/7.3.0-atmel3.6.1-arduino7/bin/avr-g++: no such file or directory

Fortunately it's just the case of specifying interpreter, here's what I'm using:

for i in ~/.arduino*/packages/arduino/tools/avr-gcc/*/bin/*; do
  mv "$i" "$i.real";
  printf '#!/bin/bash\nexec "'"$i"'.real" ${1+"$@"}\n' > "$i"
  chmod +x "$i";
done

Now it works great!