1 /* -*- buffer-read-only: t -*- vi: set ro: */
2 /* DO NOT EDIT! GENERATED AUTOMATICALLY! */
3 /* A C macro for emitting link time warnings.
4 Copyright (C) 1995, 1997, 2000, 2002-2003, 2007, 2009-2010 Free Software
7 This program is free software: you can redistribute it and/or modify it
8 under the terms of the GNU General Public License as published
9 by the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Lesser General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 /* GL_LINK_WARNING("literal string") arranges to emit the literal string as
21 a linker warning on most glibc systems.
22 We use a linker warning rather than a preprocessor warning, because
23 #warning cannot be used inside macros. */
24 #ifndef GL_LINK_WARNING
25 /* This works on platforms with GNU ld and ELF object format.
26 Testing __GLIBC__ is sufficient for asserting that GNU ld is in use.
27 Testing __ELF__ guarantees the ELF object format.
28 Testing __GNUC__ is necessary for the compound expression syntax. */
29 # if defined __GLIBC__ && defined __ELF__ && defined __GNUC__
30 # define GL_LINK_WARNING(message) \
31 GL_LINK_WARNING1 (__FILE__, __LINE__, message)
32 # define GL_LINK_WARNING1(file, line, message) \
33 GL_LINK_WARNING2 (file, line, message) /* macroexpand file and line */
34 # define GL_LINK_WARNING2(file, line, message) \
35 GL_LINK_WARNING3 (file ":" #line ": warning: " message)
36 # define GL_LINK_WARNING3(message) \
37 ({ static const char warning[sizeof (message)] \
38 __attribute__ ((__unused__, \
39 __section__ (".gnu.warning"), \
45 # define GL_LINK_WARNING(message) ((void) 0)