Ttorial HM move without party knowing them

[Gym Leader Brock]

Hi, I followed the tutorial published on the page "https://github.com/pret/pokeemerald/wiki/Use-HMs-Without-Any-Pokemon-in-your-Party-Knowing-Them"
to be able to use HMs without teaching them to pokémon (i'm using pokeruby disassembler).
Compiling the rom gives me the following error:
"agbcc: warnings being treated as errors
src/field_control_avatar.c: In function `GetInteractedWaterScript':
src/field_control_avatar.c:506: warning: implicit declaration of function `CheckBagHasItem'
make[1]: *** [Makefile:253: build/ruby/src/field_control_avatar.o] Error 1
make: *** [Makefile:267: ruby] Error 2".

I copied the code directly from the page so I don't understand what it could depend on.
Is there anyone who can help me?
Thanks in advance

 

[Lunos]

src/field_control_avatar.c:506: warning: implicit declaration of function `CheckBagHasItem'

Make sure that you have a #include "item.h" in the list of header files invoked at the top of src/field_control_avatar.c.
The CheckBagHasItem function is defined in include/item.h, so src/field_control_avatar.c needs to be able to read the contents of the file in order to be able to invoke that function.

 

[Gym Leader Brock]

Thank you very much, now I can compile the pokeruby rom without problems.
Unfortunately, although I won the first medal, I can't use the HM Cut without teaching it.
I noticed that there are some code differences between ruby/sapphire and emerald.
Maybe I didn't put the tutorial code in the right line.
Anyway, thanks again.