[OT] gcc-warning: more info

[Daniel Reuter]

Hello there, 

Thanks to all, who responded up to now. I think I'll give some more
information, as I still don't understand, why the warning 
main.c:158: assignment makes pointer from integer without a cast
is generated in my case:

I have the following (among some other function and structure 
declarations) in my program-header-file 'bet.h':

        #include <stdlib.h>
        #include <stdio.h>

        struct provided_data{
                double sample_weight;
                struct datapoint *ppovolads;
                int value_count;
        };

        struct provided_data *read_data(char *);


This function is in file 'scanner.c' and does the following:

        #include "bet.h"

        struct provided_data *read_data(char *input_file_name)
        {
                struct provided_data *prov_data_buffer;
                
                Read in some data and put them into structure provided_data.
                Then return pointer to structure provided data using the
                following statement:
                
                return(prov_data_buffer);
        }


In file main.c I have the following:

        #include "bet.h"

        int main(int argc, char **argv)
        {
                some code that reads commandline opts and so on.
                
                Here I define input_data:
                struct provided_data *input_data;
                
                Now call read_data:
--->            input_data=read_data(input_file_name);
        }

line marked with ---> is the line, the compiler complains about.
I don't quite understand this, because I never declared function read_data
to return an int. Is something wrong with my function declaration?
Regards,
Daniel