OSDev.org

Posted: **Sun Oct 29, 2023 2:11 pm**

Hello.

I've followed the barebones tutorial and got it to run in qemu. Now i'm trying to put some code in another file, test.{h,c}, but i get an error linking. There are no errors/messages compiling kernel.c. The error i get is:

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/home/billy/opt/cross/lib/gcc/i686-elf/13.2.0/../../../../i686-elf/bin/ld: ../obj/kernel.o: in function `kernel_main':
kernel.c:(.text+0x445): undefined reference to `TestFunc'
collect2: error: ld returned 1 exit status

and the command i'm running is

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i686-elf-gcc -T ../linker.ld -o ../bin/kernel.bin -ffreestanding -O2 -nostdlib ../obj//kernel.o -lgcc

Everything else is the same as the barebones tutorial.
Any help would be appreciated.

Thanks!

Posted: **Mon Oct 30, 2023 7:35 pm**

You are building a separate object file and then not including it when you link. You must include all object files in your final link.

OSDev.org

Error linking when including header files with barebones

Error linking when including header files with barebones

Re: Error linking when including header files with barebones