Arduino: 1.8.13 (Windows 10), Board: "Arduino Uno" avr-gcc: error: @C:\Windows\TEMP\cceNc5Ku: Invalid argument avr-gcc: fatal error: no input files compilation terminated. lto-wrapper.exe: fatal error ...

It appears fine to comment out the #include "malloc.h" line in e_ink_display.cpp, at least for Arduino. Edit: Just considered that this is maybe confusing with Arduino IDE.

[psgarcha] took a year-old Arduino Uno on an international trip and upon returning found something was wrong. Every time he would try to upload, he would get the dreaded avrdude error, ‘stk500 ...