Is it possible to display compiler warnings in Arduino?

Question

I would like the Arduino IDE to display compiler warnings, and I would rather not have to compile once in the terminal for warnings, and again through Arduino to generate th

Answer 1

Most answers here seem to be outdated. From Arduino.app 1.5 onwards you must find the file preferences.txt (https://www.arduino.cc/en/Hacking/Preferences) and change the line compiler.warning_level=none to compiler.warning_level=all IMPORTANT: Quit Arduino first, edit, then start the IDE again.