Hello everybody.
I'm trying to load libraries with g_module_open in windows and linux, I don't
have problems in Windows, can load perfectly the libraries. but when I do it in
linux tells me that don't find the function
I am compile mi libmilib.so with
///file1.cpp
float xfun(int d){
float res;
res = d * 3;
return res;
}
//milib.h
#ifndef __MILIB_H_
#define __MILIB_H_
float xfun(int d);
#endif
//makefile of libmilib.so
CFLAGS=-Wall -I.
libmilib.so: file1.o
ld -o libmilib.so file1.o -shared
file1.o : file1.cpp
g++ -c $?
//program for load libraries is
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <gtk/gtk.h>
#include <glib.h>
#include <gmodule.h>
typedef float (*xfun)(int d);
xfun auxFun;
int main(){
GError **error;
char xlib[300];
char namefun[30];
float res;
FILE *fp;
GModule *milib=NULL;
error=NULL;
sprintf(xlib,"/home/shadown/Desktop/misProg/make_ejemplos/gmodule/lib/libmilib.so");
sprintf(namefun,"xfun");
printf("%s",xlib);
//fp = fopen(xlib,"rb");
fp = fopen("libmilib.so","rb");
if(fp==NULL){
printf("\nI can open libmilib.so");
}
else{
printf("\nI can't open libmilib.so");
fclose(fp);
}
//Check supported
if(!g_module_supported()){
printf("\nNo supported\n");
return 0;
}
//Load lib
milib = g_module_open (xlib, G_MODULE_BIND_LAZY);
if(!milib){
printf("\nCan't load library: %s",xlib);
printf("\nError: %s",g_module_error ());
printf("\nCan't load modules, You can't use user function\n");
return 0;
}
else{
//Load function
if (!g_module_symbol (milib,namefun, (gpointer *)&auxFun)){
printf("\nUnable load function in: %s",xlib);
printf("\nError: %s", g_module_error ());
printf("\nCan't load modules, You can't use user
function\n");
if (!g_module_close (milib)) g_warning ("\nm: %s",
g_module_error ());
return 0;
}
else{
//Use function
res = auxFun(3);
printf("\nres = %f",res);
}
}
return 0;
}
//Makefile of main program
CFGTK := `pkg-config --cflags --libs gtk+-2.0 gmodule-2.0`
prog : loadlib.cpp
g++ ${CFGTK} $? -o prog
And rename function, and made a program that uses the library and works, but
when I try to load the function with g_module_symbol, I can not
When I print the error, I have the following:
Error: `xfun':
/home/shadown/Desktop/misProg/make_ejemplos/gmodule/lib/libmilib.so: undefined
symbol: xfun
the function print between ( ` ) and ( ' )
I do not know if this error there.
can somebody help me?
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