https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90429
Bug ID: 90429 Summary: lto-wrapper.exe: fatal error: C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.21.0_x86__ mdqgnx93n4wtt\hardware\tools\avr/bin/avr-gcc returned 1 exit status Product: gcc Version: lto Status: UNCONFIRMED Severity: normal Priority: P3 Component: lto Assignee: unassigned at gcc dot gnu.org Reporter: sandreas at satx dot rr.com CC: marxin at gcc dot gnu.org Target Milestone: --- I installed version 1.8.9 (Windows Store 1.8.21.0) Without making any changes to my Marlin configuration (it compiled cleanly earlier today) I did a compile. I received this error: Please submit a full bug report, with preprocessed source if appropriate. See <http://gcc.gnu.org/bugs.html> for instructions. lto-wrapper.exe: fatal error: C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.21.0_x86__mdqgnx93n4wtt\hardware\tools\avr/bin/avr-gcc returned 1 exit status compilation terminated. c:/program files/windowsapps/arduinollc.arduinoide_1.8.21.0_x86__mdqgnx93n4wtt/hardware/tools/avr/bin/../lib/gcc/avr/5.4.0/../../../../avr/bin/ld.exe: error: lto-wrapper failed collect2.exe: error: ld returned 1 exit status exit status 1 Error compiling for board Arduino/Genuino Mega or Mega 2560.