I have a small problem with the include clause. The fucntions i have declared inside the .h files pop up an "unresolved function-name". Its like the include is not there at all. Any ideas anyone. BTW, other questions can be posted here as well.

Well, if the compiler complains about some code inside that .h file,
then it must have been included.
A little bit of the offending code might be helpful...

Yep, as homer j said ... if you get something about
unresolved you're already past the compile, the header
has been inlcuded, but the linker can't find the object
code that matches the funtion the header described.

And more info would definitely help in assessing
this problem ;) ... e.g. a copy and paste of the error
message would be helpful.


Cheers,
Tink

The functions are declared yet not implemented in the .h file. I have another file with the exact same name but with the extension .pc, where the fucntion declared in the .h is implemented.

#include "atcli031.h" // this is the .h file include in the file that uses the fucntion
extern int atcli031_Consulta_conceptos_recibo_detalle (atcli031_conceptos_recibo_detalle_Arg * , char** );
//this is the function declared here in the .h file

//The implementation is in the atcli031.pc file like follows:
extern int atcli031_Consulta_conceptos_recibo_detalle(atcli031_conceptos_recibo_detalle_Arg *lsp_conceptos_recibo_detalle_Arg, char **pcp_Out )
{
int li_Status;
char * lcp_Out;
long ll_Contador = 0;
atcli031_conceptos_recibo_detalle *lsp_conceptos_recibo_detalle;
// the rest of the code goes here
return 0;
}

//After this, i include #include "atcli031.h" in another file called call_031.c like follows
#include "fgen.h"
#include "atcli031.h"
//Then i try to call the function atcli031_Consulta_conceptos_recibo_detalle like this
int main()
{
char* ll_Nis_Rad = "3231659";
char* ll_Sec_Nis = "1";
char* ll_Sec_Rec = "0";

char *lcp_bloque_atcli031;
atcli031_conceptos_recibo_detalle_Arg slp_atcli031;

/*ESTRUCTURA PARA LA FUNCION ATCLI031*/

slp_atcli031.l_secrec = ll_Sec_Rec;
slp_atcli031.l_nisrad = ll_Nis_Rad;
slp_atcli031.l_secnis = ll_Sec_Nis;
strcpy(slp_atcli031.fh_ffact,lf_Ffact);
if((atcli031_Consulta_conceptos_recibo_detalle(&slp_atcli031,&lcp_bloque_atcli031)) < 0 )
return -1;
else
{
printf("Exito");
return 1;
}
}

The ERROR says (compiling with cc call_031.c):
ld:
Unresolved:
atcli031_Consulta_conceptos_recibo_detalle

You'll need to compile that .pc file first, and add
the object file to the command-line for the real thing,
e.g.

gcc real-file.c atcli031.o -o real-file

As we said - it compiles fine, it just doesn't link,
and there's nothing wrong with the code, just with
the steps you try for linking.


Cheers,
Tink

I have no .o files, how do i generate them?

call_031.c is the file i am trying to compile. Inside i have an include of #include "atcli031.h", that contains only a definition of the function "atcli031_Consulta_conceptos_recibo_detalle(atcli031_conceptos_recibo_detalle_Arg *lsp_conceptos_recibo_detalle_Arg, char **pcp_Out )". The implementation of this function is in a .pc file. I guess you are right, i need to link the .pc file with the .h file and then the .h file with call_031.c. The thing is i have no .o files anywhere. Am i completely lost here?

Here is what i wrote in the command line:
cc call031.c atcli_031.o -o call031

I got some warnings that have nothing to do with the issue. But here is the full description of the other problem i get regarding the function:
ld:
Can't open: atcli031.o (No such file or directory)
How do i create the .o file?

What exactly is that .pc file?

Is it C-source with a funny name, or is it what
package-config would be using? In the latter
case it's not quite what you need (or need to do).

If it's a C source file you can compile it using
gcc atcli031.pc -c
which will create atcli031.o ....


Cheers,
Tink

It's actually pro c code. It's c. I have no idea why it is set up this way, but i have to work with it. Definitions of structs and functions in .h files and the implementation in .pc files. The code i put on one of my replies shows how the atcli031.pc file looks like, and how it is called from the .c file, the one i am compiling, or trying. Jejejeje.

And, will it compile in the way I suggested? :)


Cheers,
Tink

The terminal i use at work does not accept gcc, only cc. I came home and tried the gcc and it does work. What i understand you're saying is to compile the .pc file, that creates the .o file, and then compile the .c file with the .o file option, am i correct?

Yep - that should do the trick.


Cheers,
Tink

Here at work i can't use gcc. What i need to do now is generate a .o file from a .pc file. How do i do this?

man cc
for details on generating intermediate object-files.

I have no clue :)


Cheers,
Tink

I've worked out another solution for the first problem, but no i want to start relearning C at home, and i want to use the mysql engine that i read comes with mandrake. Or maybe i read that wrong. Can i set up mysql database on mandrake and start connecting with C?

BTW, i have the simple "Hello World example" and i get a damn warning i have no idea what it means.

Here's the code and warning.

#include <stdio.h>
#include <math.h>
#include <string.h>
#include <assert.h>

main()
{
//array_ini();
int arr[5]={1,2,3,4,5};
printf("WTF?\n");
}

hola.cc:12:2: warning: no newline at end of file

Thanks Tink, seems u r the only one reading this thread. Jejeje.

Yes.

The error is likely caused by your editor. What editor did you use. Try to put a few newlines at the end of the file.