Does your project use CMake ? CMake supports these with all major compilers... I'll just google "<your build system> pre-compiled headers" and see if there is

Does your project use CMake ? CMake supports these with all major compilers... I'll just google "<your build system> pre-compiled headers" and see if there is a flag or option that you can enabled. You will definetly need quite a bit of fine tuning for apps over 500k LOC or so, but if your app is under that, and you are splitting code between .h and .cpp files appropriately, just flipping a flag might get you 80% there. The speed ups you see people get from PCHs is like 20-30% faster compile-times. So they are more a "nice to have" feature than something that will solve your compile-time problems. If your app is structured in such a way that it takes 20 min to compile, this can cut it to 15 min at most, but that would probably still suck. If you want more, then you'd need to consider other solutions like distributed build caches (sccache, etc.).