1/* 2 * Copyright (c) 2005-2009 Apple Inc. All rights reserved. 3 * 4 * @APPLE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. Please obtain a copy of the License at 10 * http://www.opensource.apple.com/apsl/ and read it before using this 11 * file. 12 * 13 * The Original Code and all software distributed under the License are 14 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 15 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 16 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 18 * Please see the License for the specific language governing rights and 19 * limitations under the License. 20 * 21 * @APPLE_LICENSE_HEADER_END@ 22 */ 23 24#include <stdbool.h> 25#include <Availability.h> 26 27 28// _dyld_func_lookup is only available in 10.5 and earlier 29#if defined(__MAC_OS_X_VERSION_MIN_REQUIRED) && (__MAC_OS_X_VERSION_MIN_REQUIRED <= __MAC_10_5) 30 31extern bool _dyld_func_lookup(const char* dyld_func_name, void** address); 32 33 34 35bool check_dyld_func_lookup() 36{ 37 void* address; 38 39 // dlopen does not exist, something is wrong 40 if ( ! _dyld_func_lookup("__dyld_dlopen", &address) ) 41 return false; 42 43 // if a garbage string returns true, something is wrong 44 if ( _dyld_func_lookup("blablah", &address) ) 45 return false; 46 47 // looks good 48 return true; 49} 50 51#endif 52