1 /* 2 * ALSA lib - dynamic symbol versions 3 * Copyright (c) 2002 by Jaroslav Kysela <perex@perex.cz> 4 * 5 * 6 * This library is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU Lesser General Public License as 8 * published by the Free Software Foundation; either version 2.1 of 9 * the License, or (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with this library; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 19 * 20 */ 21 22 #ifndef __ALSA_SYMBOLS_H 23 #define __ALSA_SYMBOLS_H 24 25 #if defined(PIC) && defined(VERSIONED_SYMBOLS) /* might be also configurable */ 26 #define USE_VERSIONED_SYMBOLS 27 #endif 28 29 #define INTERNAL_CONCAT2_2(Pre, Post) Pre##Post 30 #define INTERNAL(Name) INTERNAL_CONCAT2_2(__, Name) 31 32 #define symbol_version(real, name, version) \ 33 __asm__ (".symver " ASM_NAME(#real) "," ASM_NAME(#name) "@" #version) 34 #define default_symbol_version(real, name, version) \ 35 __asm__ (".symver " ASM_NAME(#real) "," ASM_NAME(#name) "@@" #version) 36 37 #ifdef __clang__ 38 #define EXPORT_SYMBOL __attribute__((visibility("default"))) 39 #else 40 #define EXPORT_SYMBOL __attribute__((visibility("default"),externally_visible)) 41 #endif 42 43 #ifdef USE_VERSIONED_SYMBOLS 44 #define use_symbol_version(real, name, version) \ 45 symbol_version(real, name, version) 46 #define use_default_symbol_version(real, name, version) \ 47 default_symbol_version(real, name, version) 48 #else 49 #define use_symbol_version(real, name, version) /* nothing */ 50 #if defined(__alpha__) || defined(__mips__) 51 #define use_default_symbol_version(real, name, version) \ 52 __asm__ (".weak " ASM_NAME(#name)); \ 53 __asm__ (ASM_NAME(#name) " = " ASM_NAME(#real)) 54 #else 55 #define use_default_symbol_version(real, name, version) \ 56 __asm__ (".weak " ASM_NAME(#name)); \ 57 __asm__ (".set " ASM_NAME(#name) "," ASM_NAME(#real)) 58 #endif 59 #endif 60 61 #endif /* __ALSA_SYMBOLS_H */ 62