Bug Report

Current behavior

cmd.exe /r "C:\Users\pc\Documents\tool\arduino-cli.exe" compile "C:\Users\pc\Documents\tool\sketch\sketch.ino" -b arduino:avr:diecimila --libraries "C:\Users\pc\Documents\tool\libs" --output-dir "C:\Users\pc\Documents\tool\sketch\out" --verbose

It says it can't find a header file inside \tool\libs directory (with #include "header.h") .

Expected behavior

It should find the file like it does when the \libs\ folder is inside the same directory as the sketch (#include "libs/header.h")

Environment

• CLI version (output of arduino-cli version):
• OS and platform:

Additional context

Looking at the source code it seems like the values passed to --libraries are added to a list but aren't referenced ever again. Maybe this is the cause of the issue.