How to speed up g++ compile time (when using a lot of templates)

Question

This question is perhaps somehow odd, but how can I speed up g++ compile time? My C++ code heavily uses boost and templates. I already moved as much as possible out of the h

Answer 1

If there are a lot of files you can speed up compilation a lot by just having one .cpp file that #includes all the other .cpp files. This of course requires you to be more careful with macros and such that you already have defined per file as they will now be visible to other cpp files.

If there are many files this can reduce compile time a lot.