ld.so.1 can't find symbol.

[Christopher Lintz]

Can someone offer direction to this strange problem.  I have built a 4 line function and built it into a shared library using libtool.  I call the library with dlopen() (which is succesful), but when I call dlsym() it can't find the symbol for the function.  However, If i go into the gdb debugger and display the functions (info functions) in the symbol table, my function is there!!!  I can even call the function in gdb (call foo(3) ). 

 

I am on Solaris 2.6 and installed the latest linker patch (107733-09) that did not help a thing.  Does anyone know what could possibly be happening?? 

 

Here is my libtool commands (which work fine):

libtool gcc -g -O -c gcc001.cpp
libtool gcc -g -O -o libgcc001.la gcc001.lo -rpath /home/cjl/lang/c++/sharedLibraries/.libs -lm
libtool gcc -module -o libgcc001.la gcc001.lo -rpath /home/cjl/lang/c++/sharedLibraries/.libs -lm
libtool gcc -g -export-dynamic -ldl -o dlopen dlopen.cpp

Here is my shared object code (gcc001.cpp):

int myTestFunction(int x)
{
  x = x*2;
  return x;
}

Here is my code that does the dlopen() and dlsym():

 

#include <stdio.h>
#include <dlfcn.h>
#include <stdio.h>


int main()
{    


   void *handle;
   int (*fptr)(int);
   char* error = 0;

   handle = dlopen("/home/cjl/lang/c++/sharedLibraries/.libs/libgcc001.so", RTLD_NOW | RTLD_WORLD  );
   if(!handle)
   {
      fputs( dlerror(), stderr);
      exit( -1 );
   }

   fptr = (int (*) (int) ) dlsym(handle, "myTestFunction");
   char* error_msg = dlerror();
   if (error_msg)
   {

      fprintf(stderr, "Error locating mytestFunction %s\n", error_msg );
      dlclose(handle);
      exit(-1);
   }

   printf("%d\n",(*fptr)(8) );
   dlclose(handle);
   return 0;
}