[bluecalm]

Initializing variables means the compiler will not be able to warn you when you use ununitialized value. I prefer to get the warning than use zero initialized one by accident.

Build.c file - good idea if performance is priority but you remove an option to get incremental builds (with make or the like).

I would add: read about warning options and enable as many as sensible ("-Wall -Wextra -pedantic from memory but there are a few others). Treat warnings seriously, don't allow them for longer than debugging/experimenting stage.

C99 has some useful features (like designated initializers or compound literals). Check if your compiler supports it.