1 #ifndef __WARNING_H__
2 #define __WARNING_H__
3 
4 /******************************************************************************
5 *                                                                             *
6 * License Agreement                                                           *
7 *                                                                             *
8 * Copyright (c) 2003 Altera Corporation, San Jose, California, USA.           *
9 * All rights reserved.                                                        *
10 *                                                                             *
11 * Permission is hereby granted, free of charge, to any person obtaining a     *
12 * copy of this software and associated documentation files (the "Software"),  *
13 * to deal in the Software without restriction, including without limitation   *
14 * the rights to use, copy, modify, merge, publish, distribute, sublicense,    *
15 * and/or sell copies of the Software, and to permit persons to whom the       *
16 * Software is furnished to do so, subject to the following conditions:        *
17 *                                                                             *
18 * The above copyright notice and this permission notice shall be included in  *
19 * all copies or substantial portions of the Software.                         *
20 *                                                                             *
21 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR  *
22 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,    *
23 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE *
24 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER      *
25 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING     *
26 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER         *
27 * DEALINGS IN THE SOFTWARE.                                                   *
28 *                                                                             *
29 *                                                                             *
30 ******************************************************************************/
31 
32 /*
33  * alt_warning.h provides macro definitions that can be used to generate link
34  * time warnings.
35  */
36 
37 #ifdef __cplusplus
38 extern "C"
39 {
40 #endif /* __cplusplus */
41 
42 /*
43  * The symbol "__alt_invalid" is used to force a link error. There should be
44  * no corresponding implementation of this function.
45  */
46 
47 extern void __alt_invalid (void);
48 
49 #define ALT_LINK_WARNING(symbol, msg)                                                      \
50   __asm__(".ifndef __evoke_link_warning_" #symbol                                          \
51           "\n\t .section .gnu.warning." #symbol                                            \
52           "\n__evoke_link_warning_" #symbol ":\n\t .string \x22" msg "\x22 \n\t .previous" \
53           "\n .endif");
54 
55 /* A canned warning for sysdeps/stub functions.  */
56 
57 #define ALT_STUB_WARNING(name) \
58   ALT_LINK_WARNING (name, \
59     "warning: " #name " is not implemented and will always fail")
60 
61 #define ALT_OBSOLETE_FUNCTION_WARNING(name) \
62   ALT_LINK_WARNING (name, \
63     "warning: " #name " is a deprecated function")
64 
65 #define ALT_LINK_ERROR(msg) \
66   ALT_LINK_WARNING (__alt_invalid, msg); \
67   __alt_invalid()
68 
69 #ifdef __cplusplus
70 }
71 #endif
72 
73 #endif /* __WARNING_H__ */
74