What are the .la and .lo files?

[LubomirBogdanov]

Hello guys,
I've contributed to BEEBs a couple of years ago when there were only .o .axf (.elf) and .bin files. I was able to flash them and use openocd with my microcontrollers.

However at some point the build system changed and now there are .la .lo .o and .bin files. If I try to flash any of these files I see that my program is stuck at some random address 0xffff.ffa0 and GDB cant find any symbols even though I have -g flag.

Could you give me some kind of guidance, or a keyword, so that I can understand why you use .la and .lo files?

I'd like to contribute some more, because I have access to lots of boards at my university.

Regards,
L. B.