Good Software Won't Link

Last hands-on with C++ and Java was 2001, what's the function while (1) suppose to mean?

That just sits doing now't for ever.

I'm beginning to suspect I've got some of the configuration files wrong... I'm trying to tease it back to some simple known working state. It makes no sense at the moment.

How on earth it can't recognise a function in another module is beyond me.

In assembler you'd just have to say the function was external and where it's written you'd say it was global.... easy.... C is too clever by half, complicated to the point of uselessness.

Del

would it not be possible to write it on single file? of course with out external.

Yes indeed, as I said in the original post.
This is just a cut down tiny portion to show there is a problem. The real software is large and complex (not just putting numbers into memory locations). I'm just struggling to get to the root of what should be a trivial problem.

'main' should be able to use the function 'levels' but for some reason the compiler is not resolving the names.

Del

Yes, probably compiler problem. Sorry, I haven't noticed in your post so well, like I passively read sometimes.

Sounds to me like you are now missing some data from a library file that the compiler needs. Have you added or updated any other software that might overwrite library files held in the dreaded DLLs?

Microsoft has done that to me in the past. Update a MSC MFC DLL and loose a required routine not in the updated DLL, took days to find, then had to go back to an earlier version to get the compiler happy again.

Cheers I'm going to have to try and rebuild it all from the floor I think.
Might even have to resort to trying to read the documentation (all damn pdfs of course)... the development system is a nightamre... all shiny font end and you have no idea where the files come from or go to.

Gimme old school any time.

Del

Just declare "levels" function as "extern" into header file to make sure it is read first, and put the actual definition in c file. Header guards to prevent re-including is also good idea. S.M.

Can you give and example of exactly what I should put in?

I've tried sticking the word extern in front of the void levels(void);

maybe there is maybe some daft syntax I'm missing?

Del

You need to tell main that levels is available and what arguments it has. Place this in main after the uint16 declaration. void levels(void);

Yeah, I've tried all that...

like I said I've sprinkled void levels(void); all over the place...

Del

It's probably an RTFM problem in clause 1d10t.

Like most projects it was done in a blazing hurry, piggybacked on the suppliers example and now I need to tease it into some sort of order.

No thanks for getting done on time just long faces and mumbling now I need to spend time house keeping. T'was ever thus.

I'm printing out the several manuals that come with the dev't kit so I can pough through them in detail... oh joy!

The tech support works like most tech support... they do nothing in the knowledge that given enough time you'll fix it (or retire and go make bows )

Del

I'm surprised your compiler has not generated even more error messages. The main() program in C has a very specific form, which is
int // Specifies that type of variable the function returns.
// main() must return an integer
main ( int argc, char **argv ) {
// code
return 0; // Indicates that everything vent well.
}
The format of the parameters for main is fixed, but the use of the parameters is optional, i.e. you need not give values when running a program unless you want to. You should also be making use of header files (.h) for your declarations, e.g.
//levels.h
void levels(void);
and your main file would include the declaration at the top
#include "levels.h"
In general, the .h files would include all the declarations and the .c files the code. In that way you can achieve the aim of modules of reusable code.

Fixed it!

It was now't to do with functions, declarations etc.

Once I studied the linker output files I spotted some extra stuff in there.
The "project" had some how got a second load of files from another demo project mixed in with it. The project structure is shown as a tree and this extra stuff had some how got dragged in at the root.
The poor thing was getting confused.

Anyhow I've taken a screen shot of the working set up for future reference.

Thanks for putting up with my rantings...

Del