If you are using dlopen you should not try to link with this library, looks like you linked your execurable with it (-l.
..)

On 24/11/10 12:50 AM, li jianfeng wrote:
> 
>  Now, I have create a executble application and a Shared Library , But when I use the library  I receive a error msg 
as 
> follows:
> ldd:FATAL: Could not load library liblibrarytest1_g.so.1
> 
> note: The  error  occurs  when I add the Extral  Library for the executble application . but if I don't  add the 
Extral 
> Libray , I  will  receive another error  msg  as  follows:
> Shared library is corrupted
> 
> my code list:
> 
> executble application:
> 
> #include <stdlib.h>
> #include <stdio.h>
> #include <fcntl.h>
> #include <dlfcn.h>
> 
> void *FunctionLib;
> const char *dlError;
> int (*Function)();
> 
> int main(int argc, char *argv[]) {
> 	int   rc;             /*  return codes            */
> 	char HelloMessage[] = "Hello World\n";
> 
> 	//printf("Welcome to the QNX Momentics IDE\n");
> 	FunctionLib=dlopen("/home/liblibrarytest1.so",RTLD_LAZY);
> 	dlError=dlerror();
> 	printf("  dlTest  3-Open Library with absolute path return-%s- \n", dlError);
> 
> 	if (dlError) exit(1);
> 	printf("  dlTest  2-Original message \n");
> 	Function=dlsym(FunctionLib,"printUPPERCASE");
> 	dlError=dlerror();
> 	printf("  dlTest  4-Find symbol printUPPERCASE return-%s- \n", dlError);
> 	if (dlError) exit(1);
> 	rc = (*Function)( HelloMessage );
> 	printf("  dlTest  5-printUPPERCASE return-%s- \n", dlError);
> 	rc = dlclose(FunctionLib);
> 	dlError=dlerror();
> 	printf("  dlTest  7-Open Library with relative path return-%s- \n", dlError);
> 	return EXIT_SUCCESS;
> }
> 
> Shared Library:
> 
>   #include <stdio.h>
> #include <stdlib.h>
> #include <ctype.h>
> 
> int printUPPERCASE ( inLine )
> char inLine[];
> {
>    char UPstring[256];
>    char *inptr, *outptr;
> 
>    inptr = inLine;
>    outptr = UPstring;
>    while ( *inptr != '\0' )
>       *outptr++ = toupper(*inptr++);
>   *outptr++ = '\0';
>    printf(UPstring);
>    return(1);
> }
> 
> note :  I  have compile and link success with the two project.
> 
> 
> 
> _______________________________________________
> 
> QNX Momentics Getting Started
> http://community.qnx.com/sf/go/post75753
>