APR_DECLARE(apr_status_t) apr_dso_load(apr_dso_handle_t **res_handle, 
                                       const char *path, apr_pool_t *pool)
{
#if defined(DSO_USE_SHL)
    shl_t os_handle = shl_load(path, BIND_IMMEDIATE, 0L);

#elif defined(DSO_USE_DYLD)
    NSObjectFileImage image;
    NSModule os_handle = NULL;
    NSObjectFileImageReturnCode dsoerr;
    const char* err_msg = NULL;
    dsoerr = NSCreateObjectFileImageFromFile(path, &image);

    if (dsoerr == NSObjectFileImageSuccess) {
#if defined(NSLINKMODULE_OPTION_RETURN_ON_ERROR) && defined(NSLINKMODULE_OPTION_NONE)
        os_handle = NSLinkModule(image, path,
                                 NSLINKMODULE_OPTION_RETURN_ON_ERROR |
                                 NSLINKMODULE_OPTION_NONE);
        /* If something went wrong, get the errors... */
        if (!os_handle) {
            NSLinkEditErrors errors;
            int errorNumber;
            const char *fileName;
            NSLinkEditError(&errors, &errorNumber, &fileName, &err_msg);
        }
#else
        os_handle = NSLinkModule(image, path, FALSE);
#endif
        NSDestroyObjectFileImage(image);
    }
    else if ((dsoerr == NSObjectFileImageFormat ||
             dsoerr == NSObjectFileImageInappropriateFile) &&
             NSAddLibrary(path) == TRUE) {
        os_handle = (NSModule)DYLD_LIBRARY_HANDLE;
    }
    else {
        err_msg = "cannot create object file image or add library";
    }

#elif defined(DSO_USE_DLFCN)
#if defined(OSF1) || defined(SEQUENT) || defined(SNI) ||\
    (defined(__FreeBSD_version) && (__FreeBSD_version >= 220000)) ||\
    defined(__DragonFly__)
    void *os_handle = dlopen((char *)path, RTLD_NOW | RTLD_GLOBAL);

#else
    int flags = RTLD_NOW | RTLD_GLOBAL;
    void *os_handle;
#ifdef _AIX
    if (strchr(path + 1, '(') && path[strlen(path) - 1] == ')')
    {
        /* This special archive.a(dso.so) syntax is required for
         * the way libtool likes to build shared libraries on AIX.
         * dlopen() support for such a library requires that the
         * RTLD_MEMBER flag be enabled.
         */
        flags |= RTLD_MEMBER;
    }
#endif
    os_handle = dlopen(path, flags);
#endif    
#endif /* DSO_USE_x */

    *res_handle = apr_pcalloc(pool, sizeof(**res_handle));

    if(os_handle == NULL) {
#if defined(DSO_USE_SHL)
        (*res_handle)->errormsg = strerror(errno);
        return APR_EDSOOPEN;
#elif defined(DSO_USE_DYLD)
        (*res_handle)->errormsg = (err_msg) ? err_msg : "link failed";
        return APR_EDSOOPEN;
#elif defined(DSO_USE_DLFCN)
        (*res_handle)->errormsg = dlerror();
        return APR_EDSOOPEN;
#endif
    }

    (*res_handle)->handle = (void*)os_handle;
    (*res_handle)->pool = pool;
    (*res_handle)->errormsg = NULL;

    apr_pool_cleanup_register(pool, *res_handle, dso_cleanup, apr_pool_cleanup_null);

    return APR_SUCCESS;
}