Thread: undefined reference to 'clnt_create'

So the linker (i guess) gives me the following error:

obj\Release\main.o:main.c undefined reference to `clnt_create'

I tried adding libc.a to my libraries but that doesn't fix it.

in CodeBlocks when I do a 'Find declaration of:' it goes to the line in my included clnt.h file:

extern CLIENT *clnt_create(const char *, const rpcprog_t, const rpcvers_t, const char *);

Any idea what I've done wrong? I assume it's a common newbie error.

The whole program is:

Code:

#include <stdio.h>
#include <stdlib.h>
#include <memory.h>
#include "rap.h"
static struct timeval TIMEOUT = { 25, 0 };
RAPVAR_READ_NAME_RESP_TYPE *rapvar_read_name_1(RAPVAR_READ_NAME_REQ_TYPE *argp, CLIENT *clnt)
{

    RAPVAR_READ_NAME_REQ_TYPE *inproc = NULL;
    RAPVAR_READ_NAME_RESP_TYPE *outproc = NULL;
RAPVAR_READ_NAME_RESP_TYPE clnt_res;
memset((char *)&clnt_res, 0, sizeof(clnt_res));

printf("Hello world!\n");

    if (clnt_call (clnt, 1001, (xdrproc_t) inproc, (caddr_t) argp,              /*---CRASH--- */
        (xdrproc_t) outproc, (caddr_t) &clnt_res, TIMEOUT) != RPC_SUCCESS)
        {
            return (NULL);
            printf("clnt_call FAILED!\n");
        }
    return (&clnt_res);
}

int main()
{
    int Pclient= 1;
    int pstat=0;
    RAPVAR_READ_NAME_RESP_TYPE *result = NULL;
    RAPVAR_READ_NAME_REQ_TYPE request;

    CLIENT *clnt;
    clnt = clnt_create("s4c",300456,1,"tcp");

    request.head.userdef=1;
    request.var.name="name";
    request.var.type="robposdata";
    request.var.domain=1;
    request.var.number1=0;
    request.var.number2=26;                                /*ROBTARGET_TRANSFER_TYPE */

    result = rapvar_read_name_1(&request, clnt);        /*Call the RPC function */


    if (result == (RAPVAR_READ_NAME_RESP_TYPE *) NULL)
    {
        printf("'result' is NULL\n");
        pstat = -1;
        return(0);
    }

    pstat = result->resp.status;

    if (pstat >= 0)
    {
        float *trans = NULL;
        trans[0] = result->resp.RAPVAR_READ_NAME_RESPX_TYPE_u.data.RAPVAR_DATA_TYPE_u.robposdata.robtarget.trans.x;
        trans[1] = result->resp.RAPVAR_READ_NAME_RESPX_TYPE_u.data.RAPVAR_DATA_TYPE_u.robposdata.robtarget.trans.y;
        trans[2] = result->resp.RAPVAR_READ_NAME_RESPX_TYPE_u.data.RAPVAR_DATA_TYPE_u.robposdata.robtarget.trans.z;

        printf("\nx = ");
        printf("%f",trans[0]);
        printf("\ny = ");
        printf("%f",trans[1]);
        printf("\nz = ");
        printf("%f",trans[2]);


 build (RAPVAR_READ_NAME_REQ_TYPE *argp, CLIENT *clnt)
    rapvar_read_name_1( *argp, *clnt)
    print result
        return 0;
    }
return 0;
}

A prototype of clnt_create is located in clnt.h, not rpc.h. however BOTH are 'included' in rap.h:

Code:

/*rap.h*/
/*
 * Please do not edit this file.
 * It was generated using rpcgen.
 */


#ifndef _RAP_H_RPCGEN
#define _RAP_H_RPCGEN


//#include <rpc/rpc.h>
#include "tirpc/rpc/rpc.h"
#include "tirpc/rpc/clnt.h"
<...>

Background:
I'm using Code::Blocks and it's gcc compiler found in it's Mingw directory.
I'm using RPC headers that came with Cygwin (cygwin/usr/include/tirpc/rpc).
I found a library that came with cygwin (libtirpc.dll.a) that contains 'clnt_create' but when I want to run it on another PC I have to bring several other cygwin .dlls with it.
I was under the impression that clnt_create was a standard UNIX function, like clnt_call. windows services for UNIX library has it in librpclib.c but it creates hundreds of errors during linking.

Currently I am trying to build a .exe that executes a call to a unix based RPC server. Thus far my attempts to create a client handle have failed:

Code:

int main()
{
    int Pclient= 1;
    int pstat=0;
    RAPVAR_READ_NAME_RESP_TYPE *result = NULL;
    RAPVAR_READ_NAME_REQ_TYPE request;

    CLIENT *clnt = NULL;
    clnt = clnt_create("s4c",300456,1,"tcp");
    if(clnt==NULL) printf("Client is\tNULL\n");

    CLIENT *clnt2 = NULL;
    clnt2 = clnt_create("192.168.1.2",300456,1,"tcp");
    if(clnt2==NULL) printf("Client2 is\tNULL\n");
<...>
    return(0);
}

Client is NULL
Client2 is NULL

I'd rather use Mingw IF I can find a compatible library with the clnt_create function.
Any ideas where to look for one? I've already downloaded code:: blocks with mingw and Mingw from mingw.org and they don't have it.
OR
Does anyone know how to build a self contained .exe that will work in Windows on other computers WITHOUT having to ferry along a slew of cygwin dlls?

THANKS for the find. I'll let you know how it goes.

So I copied the lib, include and manifest folders from the libgw32c-0.4-lib.zip file into my c:\rap02 directory.
I added C:\rap02\lib\libgw32c.a to my Link libraries.
I added C:\rap02\include\glibc to my Compiler, Linker and Resource compiler Search directories.
This is my build log (Compiler logging: Full command line):



-------------- Clean: Debug in rap02 ---------------


Cleaned "rap02 - Debug"


-------------- Build: Debug in rap02 ---------------


mingw32-gcc.exe -Wall -g -IC:\rap02\include\glibc -c C:\rap02\main.c -o obj\Debug\main.o
C:\rap02\main.c: In function 'rapvar_read_name_1':
C:\rap02\main.c:40: warning: function returns address of local variable
C:\rap02\main.c: In function 'main':
C:\rap02\main.c:47: warning: unused variable 'Pclient'
mingw32-g++.exe -LC:\rap02\include\glibc -o bin\Debug\rap02.exe obj\Debug\main.o C:\rap02\lib\libgw32c.a
obj\Debug\main.o: In function `main':
C:/rap02/main.c:53: undefined reference to `clnt_create'
C:/rap02/main.c:57: undefined reference to `clnt_create'
collect2: ld returned 1 exit status
Process terminated with status 1 (0 minutes, 0 seconds)
2 errors, 2 warnings

clnt.h contains only a prototype for the clnt_create funtion.
The actual definition should be in a library, like a .a or a .dll.
Apparently the lib (libgw32c.a) does not have the function.

I got this this morning:



-------------- Clean: Release in rap00 ---------------


Cleaned "rap00 - Release"


-------------- Build: Release in rap00 ---------------


Compiling: main.c
cygwin warning:
MS-DOS style path detected: C:/cygwin/home/eb/rap00/main.c
Preferred POSIX equivalent is: /cygdrive/c/cygwin/home/eb/rap00/main.c
CYGWIN environment variable option "nodosfilewarning" turns off this warning.
Consult the user's guide for more details about POSIX paths:
Chapter 3. Using Cygwin
In file included from C:/cygwin/usr/include/tirpc/rpc/rpc.h:67:0,
from C:/cygwin/home/eb/rap00/rap.h:16,
from C:/cygwin/home/eb/rap00/main.c:10:
C:/cygwin/usr/include/tirpc/rpc/svc.h:369:11: warning: ‘struct t_bind’ declared inside parameter list
C:/cygwin/usr/include/tirpc/rpc/svc.h:369:11: warning: its scope is only this definition or declaration, which is probably not what you want
In file included from C:/cygwin/home/eb/rap00/rap.h:16:0,
from C:/cygwin/home/eb/rap00/main.c:10:
C:/cygwin/usr/include/tirpc/rpc/rpc.h:104:59: warning: ‘struct __rpc_sockinfo’ declared inside parameter list
C:/cygwin/usr/include/tirpc/rpc/rpc.h:105:35: warning: ‘struct __rpc_sockinfo’ declared inside parameter list
C:/cygwin/home/eb/rap00/main.c: In function ‘rapvar_read_name_1’:
C:/cygwin/home/eb/rap00/main.c:40:5: warning: function returns address of local variable
C:/cygwin/home/eb/rap00/main.c: In function ‘main’:
C:/cygwin/home/eb/rap00/main.c:47:9: warning: unused variable ‘Pclient’
Linking console executable: bin\Release\rap00.exe
obj/Release/main.o: file not recognized: File format not recognized
collect2: ld returned 1 exit status
Process terminated with status 1 (0 minutes, 1 seconds)
0 errors, 6 warnings

And when I looked rap00.exe did not exist anywhere.
So I switched every compilers I was using in my toolchain to whatever looked compatible in my c:/mingw install.
It compiles/runs with no errors but still fails to create a client (returns a NULL).
I am also using cygwin's libtirpc.dll.a library and it's dependencies because it's the only library I can find that defines the clnt_create function.

btw - thanks again for trying to help.