What is a .h.gch file?

Question

I recently had a class project where I had to make a program with G++.

I used a makefile and for some reason it occasionally left a .h.gch file behind.

So

Answer 1

A .gch file is a precompiled header.

If a .gch is not found then the normal header files will be used.

However, if your project is set to generate pre-compiled headers it will make them if they don’t exist and use them in the next build.

Sometimes the *.h.gch will get corrupted or contain outdated information, so deleting that file and compiling it again should fix it.