static void *		FindSymbol(Tcl_Interp *interp,
			    Tcl_LoadHandle loadHandle, const char *symbol);
static void		UnloadFile(Tcl_LoadHandle handle);

/*
 *----------------------------------------------------------------------
 *
 * DyldOFIErrorMsg --
 *
 *	Converts a numerical NSObjectFileImage error into an error message
 *	string.
 *
 * Results:
 *	Error message string.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

#if defined(TCL_LOAD_FROM_MEMORY)
static const char *
DyldOFIErrorMsg(
    int err)
{
    switch (err) {
    case NSObjectFileImageSuccess:
	return NULL;
    case NSObjectFileImageFailure:
	return "object file setup failure";
    case NSObjectFileImageInappropriateFile:
	return "not a Mach-O MH_BUNDLE file";
    case NSObjectFileImageArch:
	return "no object for this architecture";
    case NSObjectFileImageFormat:
	return "bad object file format";
    case NSObjectFileImageAccess:
	return "cannot read object file";
    default:
	return "unknown error";
    }
}
#endif /* TCL_LOAD_FROM_MEMORY */

/*
 *----------------------------------------------------------------------
 *
 * TclpDlopen --
 *
 *	Dynamically loads a binary code file into memory and returns a handle
 *	to the new code.
 *
 * Results:
 *	A standard Tcl completion code. If an error occurs, an error message

    int flags)
{
    Tcl_LoadHandle newHandle;
    Tcl_DyldLoadHandle *dyldLoadHandle;
    NSObjectFileImage dyldObjFileImage = NULL;
    Tcl_DyldModuleHandle *modulePtr;
    NSModule module;
    const char *objFileImageErrMsg = NULL;
    int nsflags = NSLINKMODULE_OPTION_RETURN_ON_ERROR;

    /*
     * Try to create an object file image that we can load from.
     */

    if (codeSize >= 0) {

	if (ms && !(ms >= mh_size && mh->magic == mh_magic &&
		 mh->filetype == MH_BUNDLE)) {
	    err = NSObjectFileImageInappropriateFile;
	}
	if (err == NSObjectFileImageSuccess) {
	    err = NSCreateObjectFileImageFromMemory(buffer, codeSize,
		    &dyldObjFileImage);
	    if (err != NSObjectFileImageSuccess) {
		objFileImageErrMsg = DyldOFIErrorMsg(err);
	    }
	} else {
	    objFileImageErrMsg = DyldOFIErrorMsg(err);
	}
    }

    /*
     * If it went wrong (or we were asked to just deallocate), get rid of the
     * memory block.
     */