Linktime error using GRRLIB and related files

Yo guys,

I warn you: I began C++ coding on Thursday evening and did not do any on Friday, thus this is my second evening.

I've been learning from teknecal's tuts on codemii, and am trying to splice some of that with the recent tic-tac-toe coding-assistance release.

All I want to do at this stage is display a background png and have a cursor png follow the IR. I believe my code is sound, so far.

I've been having trouble getting the linking to work: after much fiddling, I've got most things linking, but now I'm getting the error:

c:/devkitPro/examples/wii/experiment2/source/pngu.c:1100: undefined reference to `png_get_io_ptr'

Can anyone help me here? Perhaps a guide to what my dir structure should be, as well as the contents of the makefile bit for GRRLIB.

I would be eternally thankful.

As far as directory structure, here's how I do mine:

root dir (where makefile is)
 -- source (where main app/game source files go)
 ---- gfx (where all images go)
 ---- GRRLIB
 -------- fonts (folder)
 -------- GRRLIB.c
 -------- GRRLIB.h
 ---- libpng
 -------- pngu (folder)
 -------- png.h
 -------- pngconf.h
 -- lib (library files)
 ---- libpng.a

As far as your error goes, can you post the part of your code that uses that reference? I would also look at the code in the pngu.c file on line 1100, make sure you don't have anything misspelled.

Thanks for the response. I've fixed it now: libs listed in incorrect order in makefile -_-. Put libpng closer to the front and it works now.

I've managed to display a background with a movable cursor on it. I might submit it and call it "Stroke Derrida".

Glad to see you fixed the problem!