Hi, everyone! I’m a novice on this site. Just several days ago I became interested in ioquake3 project, after couldn’t run original compiled sources of Q3 on my windows 
After I could do it with ioquake3, I found a good book that explains some things in
Q3 modding(I think all of you know it): http://index-of.co.uk/Game-Development/Programming/Focus%20on%20Mod%20Programming%20In%20Quake%20III%20Arena.pdf
Today I’ve started with the first exercise from it, where author explains the implementation of homing missile. When I implemented required functions in g_utils.c, I had to write their definitions in g_local.h. I made my way to the end of the file and wrote the definitions of the declared functions(957 and 958 number of lines). Compiled it and that’s what I’ve got:
I started googling this error, and found answers such as this can happen if path of my program contains spaces or launching Visual Studio via administrator’s name can solve the problem, but non of these helped.
I tried to experiment and place these 2 lines of function’s definitions a bit upper in local.h where all functions from g_utils.c are defined. And wow, it has compiled and gave *qvm files.
I don’t really understand what’s going on with the compiling process and why I can’t define the functions anywhere I want in *.h file.
As far as I understand there are maybe some conflicts in translating code to bytecode via virtual machine, but I don’t understand anything about such processes
Could somebody please explain it to me what’s the problem with that? Are there any limitations for line of code or smth like that? I’m really confused. 
P.S. I use Visual Studio 2015
P.P.S Sorry for my broken English
