include/alsa-symbols.h

   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307 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 #ifdef __powerpc64__
  33 # define symbol_version(real, name, version)                    \
  34         __asm__ (".symver " ASM_NAME(#real) "," ASM_NAME(#name) "@" #version);  \
  35         __asm__ (".symver ." ASM_NAME(#real) ",." ASM_NAME(#name) "@" #version)
  36 # define default_symbol_version(real, name, version)            \
  37         __asm__ (".symver " ASM_NAME(#real) "," ASM_NAME(#name) "@@" #version); \
  38         __asm__ (".symver ." ASM_NAME(#real) ",." ASM_NAME(#name) "@@" #version)
  39 #else
  40 # define symbol_version(real, name, version) \
  41         __asm__ (".symver " ASM_NAME(#real) "," ASM_NAME(#name) "@" #version)
  42 # define default_symbol_version(real, name, version) \
  43         __asm__ (".symver " ASM_NAME(#real) "," ASM_NAME(#name) "@@" #version)
  44 #endif
  45
  46 #ifdef USE_VERSIONED_SYMBOLS
  47 #define use_symbol_version(real, name, version) \
  48                 symbol_version(real, name, version)
  49 #define use_default_symbol_version(real, name, version) \
  50                 default_symbol_version(real, name, version)
  51 #else
  52 #define use_symbol_version(real, name, version) /* nothing */
  53 #ifdef __powerpc64__
  54 #define use_default_symbol_version(real, name, version) \
  55         __asm__ (".weak " ASM_NAME(#name));                     \
  56         __asm__ (".weak ." ASM_NAME(#name));                    \
  57         __asm__ (".set " ASM_NAME(#name) "," ASM_NAME(#real));          \
  58         __asm__ (".set ." ASM_NAME(#name) ",." ASM_NAME(#real))
  59 #else
  60 #if defined(__alpha__) || defined(__mips__)
  61 #define use_default_symbol_version(real, name, version) \
  62         __asm__ (".weak " ASM_NAME(#name)); \
  63         __asm__ (ASM_NAME(#name) " = " ASM_NAME(#real))
  64 #else
  65 #define use_default_symbol_version(real, name, version) \
  66         __asm__ (".weak " ASM_NAME(#name)); \
  67         __asm__ (".set " ASM_NAME(#name) "," ASM_NAME(#real))
  68 #endif
  69 #endif
  70 #endif
  71
  72 #endif /* __ALSA_SYMBOLS_H */