Question on dlopen

[Tung-Han Hsieh <thhsieh@linux.org.tw>]

Hello,

I have a question on dlopen(). Suppose that I have a "libA.so"
which is build from

gcc -fPIC -c A.c
gcc -shared -Wl,-soname,A -o libA.so A.o -lB -ldl -L<path of libB.a>

and I also have a "libB.a" which needs the db_open() and other functions
provided by standard libdl of glibc-2.1.1. But libA.so don't need to
call db_open() directly, it will only call the functions of libB.a 
directly. libB.a is compiled like this

gcc -c B.c
ar cr libB.a B.o
ranlib libB.a

Now I have a main program which use dlopen() to load libA.so:

	void *ldso;
        if (! (ldso = dlopen("libA.so", RTLD_LAZY))) {
            fprintf(stderr, "dlerror: %s\n", dlerror());
            return  NULL;
        }

But when I run the main program, the dlopen false. The error message is
like that "the dlopen() symbol not found".

Could anyone suggest what should I do? Thank you very much.


T.H.Hsieh