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Hi!

Out of interest (and since the university currently recommends self-isolation), I was trying to build InfOS locally on my Windows laptop.
I am using Windows 10 and MinGW64 8.1.0 (x86_64-8.1.0-posix-seh-rt_v6-rev0)
I could not manage to get it to build and I was not sure whether this is a bug with InfOS, MinGW or g++, any advice would be much appreciated.

Make in the infos root directory fails with:

$ make
  CXX      arch/x86/cpu.o
cc1plus.exe: error: code model kernel does not support PIC mode

I've looked into this and all information I could find says to compile with -fno-pic (or -fno-PIC). However, line 20 of the Makefile already has export common-flags := -I$(inc-dir) -nostdinc -nostdlib -g -Wall -O3 -std=gnu++17 -fno-pic.
It's as if the flag is just ignored - there is no difference if I remove it.
It seems like this has nothing to do with flag positionality either, as moving the flag in different places (including adding it inline to make targets) did not change anything at all.

I'm currently trying to get Doom to run on this OS and noticed an issue with the memory management initialisation. It has to do with multiboot information, multiboot_info_structure is a pointer to information provided by multiboot, specified here. What I'm trying to access is the framebuffer pointer.

However accessing this structure after mm_init would lead to reads on a null page. Which is caused by this line here.

I'm not sure why the pages are zeroed out, my guess is that it's meant to be a form of memory protection, but multiboot_info_structure is accessed later on in modules_init.

The result is that mods_count would be 0 and effectively renders this function dead code. No multiboot modules would then be initialised.