include/alsa-symbols.h

/*
 *  ALSA lib - dynamic symbol versions
 *  Copyright (c) 2002 by Jaroslav Kysela <perex@perex.cz>
 *
 *
 *   This library is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU Lesser General Public License as
 *   published by the Free Software Foundation; either version 2.1 of
 *   the License, or (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU Lesser General Public License for more details.
 *
 *   You should have received a copy of the GNU Lesser General Public
 *   License along with this library; if not, write to the Free Software
 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */

#ifndef __ALSA_SYMBOLS_H
#define __ALSA_SYMBOLS_H

#if defined(PIC) && defined(VERSIONED_SYMBOLS) /* might be also configurable */
#define USE_VERSIONED_SYMBOLS
#endif

#define INTERNAL_CONCAT2_2(Pre, Post) Pre##Post
#define INTERNAL(Name) INTERNAL_CONCAT2_2(__, Name)

#if HAVE_ATTRIBUTE_SYMVER && __GNUC__ > 10
#define symbol_version(real, name, version) \
	extern __typeof (real) real __attribute__((symver (#name "@" #version)))
#define default_symbol_version(real, name, version) \
	extern __typeof (real) real __attribute__((symver (#name "@@" #version)))
#else
#define symbol_version(real, name, version) \
	__asm__ (".symver " ASM_NAME(#real) "," ASM_NAME(#name) "@" #version)
#define default_symbol_version(real, name, version) \
	__asm__ (".symver " ASM_NAME(#real) "," ASM_NAME(#name) "@@" #version)
#endif

#ifdef __clang__
#define EXPORT_SYMBOL __attribute__((visibility("default")))
#else
#define EXPORT_SYMBOL __attribute__((visibility("default"),externally_visible))
#endif

#ifdef USE_VERSIONED_SYMBOLS
#define use_symbol_version(real, name, version) \
		symbol_version(real, name, version)
#define use_default_symbol_version(real, name, version) \
		default_symbol_version(real, name, version)
#else
#define use_symbol_version(real, name, version) /* nothing */
#if defined(__alpha__) || defined(__mips__)
#define use_default_symbol_version(real, name, version) \
        __asm__ (".weak " ASM_NAME(#name)); \
        __asm__ (ASM_NAME(#name) " = " ASM_NAME(#real))
#else
#define use_default_symbol_version(real, name, version) \
	__asm__ (".weak " ASM_NAME(#name)); \
	__asm__ (".set " ASM_NAME(#name) "," ASM_NAME(#real))
#endif
#endif

#endif /* __ALSA_SYMBOLS_H */