|
libexplain
1.4.D001
|
00001 /* 00002 * libexplain - Explain errno values returned by libc functions 00003 * Copyright (C) 2008, 2010, 2013 Peter Miller 00004 * Written by Peter Miller <pmiller@opensource.org.au> 00005 * 00006 * This program is free software; you can redistribute it and/or modify 00007 * it under the terms of the GNU Lesser General Public License as published by 00008 * the Free Software Foundation; either version 3 of the License, or (at 00009 * your option) any later version. 00010 * 00011 * This program is distributed in the hope that it will be useful, 00012 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00014 * Lesser General Public License for more details. 00015 * 00016 * You should have received a copy of the GNU Lesser General Public License 00017 * along with this program. If not, see <http://www.gnu.org/licenses/>. 00018 */ 00019 00020 #ifndef LIBEXPLAIN_GCC_ATTRIBUTES_H 00021 #define LIBEXPLAIN_GCC_ATTRIBUTES_H 00022 00023 #ifdef __GNUC__ 00024 #define LIBEXPLAIN_NORETURN __attribute__((noreturn)) 00025 #define LIBEXPLAIN_LINKAGE_HIDDEN __attribute__((visibility("hidden"))) 00026 #define LIBEXPLAIN_FORMAT_PRINTF(x, y) __attribute__((format(printf, x, y))) 00027 #define LIBEXPLAIN_FORMAT_VPRINTF(x) __attribute__((format(printf, x, 0))) 00028 #else 00029 #define LIBEXPLAIN_NORETURN 00030 #define LIBEXPLAIN_LINKAGE_HIDDEN 00031 #define LIBEXPLAIN_FORMAT_PRINTF(x, y) 00032 #define LIBEXPLAIN_FORMAT_VPRINTF(x) 00033 #endif 00034 00035 /* 00036 * Convenience macros to test the versions of glibc and gcc. 00037 * Use them like this: 00038 * #if LIBEXPLAIB_GNUC_PREREQ (2,8) 00039 * ... code requiring gcc 2.8 or later ... 00040 * #endif 00041 * Note - they won't work for gcc1 or glibc1, since the _MINOR macros 00042 * were not defined way back then. 00043 */ 00044 #if defined __GNUC__ && defined __GNUC_MINOR__ 00045 # define LIBEXPLAIN_GNUC_MKREV(maj, min) \ 00046 (((maj) << 16) | (min)) 00047 # define LIBEXPLAIN_GNUC_PREREQ(pmaj, pmin) \ 00048 ( \ 00049 LIBEXPLAIN_GNUC_MKREV(__GNUC__, __GNUC_MINOR__) \ 00050 >= \ 00051 LIBEXPLAIN_GNUC_MKREV(pmaj, pmin) \ 00052 ) 00053 #else 00054 # define LIBEXPLAIN_GNUC_PREREQ(maj, min) 0 00055 #endif 00056 00057 #if LIBEXPLAIN_GNUC_PREREQ(3, 0) 00058 # define LIBEXPLAIN_ATTRIBUTE_MALLOC __attribute__ ((__malloc__)) 00059 #else 00060 # define LIBEXPLAIN_ATTRIBUTE_MALLOC 00061 #endif 00062 00063 #if LIBEXPLAIN_GNUC_PREREQ(4, 3) 00064 # define LIBEXPLAIN_ATTRIBUTE_ALLOC_SIZE(a1) \ 00065 __attribute__ ((__alloc_size__(a1))) 00066 # define LIBEXPLAIN_ATTRIBUTE_ALLOC_SIZE2(a1, a2) \ 00067 __attribute__ ((__alloc_size__(a1, a2))) 00068 #else 00069 # define LIBEXPLAIN_ATTRIBUTE_ALLOC_SIZE(a1) 00070 # define LIBEXPLAIN_ATTRIBUTE_ALLOC_SIZE2(a1, a2) 00071 #endif 00072 00073 00074 /* 00075 * We attach this attribute to functions that should never have their 00076 * return value ignored. Amongst other things, this can detect the case 00077 * where the client has called explain_fubar when they meant to call 00078 * explain_fubar_or_die instead. 00079 */ 00080 #if LIBEXPLAIN_GNUC_PREREQ(3, 4) 00081 #define LIBEXPLAIN_WARN_UNUSED_RESULT __attribute__ ((__warn_unused_result__)) 00082 #else 00083 #define LIBEXPLAIN_WARN_UNUSED_RESULT 00084 #endif 00085 00086 #endif /* LIBEXPLAIN_GCC_ATTRIBUTES_H */ 00087 /* vim: set ts=8 sw=4 et : */
1.7.6.1