I'm using GCC together with FASM for my hobby OS. Assembler objects are written in FASM, C objects in GCC, and then everything is linked together with LD.

I am automatically calculating dependencies for C objects with the following code in MAKEFILE:



Unfortunatelly, FASM does not have -M flag, so I can calculate only C dependencies currently. NASM have -M, but I prefer FASM syntax. So, maybe somebody have written some utility for this purpose. Or maybe this could be added to FASM itself. I don't like to maintain dependencies by hand.

maybe a combo of grep and sed or awk could extract all extrn ?

I don't need to extract extrn's, I need to extract include's.

Well, it seems there isn't something like this already done, so I will try to hack something by myself.