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0b19387dae
Ensure configure.h is always 1st. included header. Maybe we could eventually introduce gcc -include option, but for now this better uses dependency tracking. Also move _REENTRANT and _GNU_SOURCE into configure.h so it doesn't need to be present in various source files. This ensures consistent compilation of headers like stdio.h since it may produce different declaration.
93 lines
2.6 KiB
C
93 lines
2.6 KiB
C
/*
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* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
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* Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
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*
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* This file is part of LVM2.
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*
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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU Lesser General Public License v.2.1.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/*
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* This file must be included first by every library source file.
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*/
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#ifndef _LVM_LIB_H
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#define _LVM_LIB_H
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/*
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* Symbol export control macros
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*
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* DM_EXPORT_SYMBOL(func,ver)
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* DM_EXPORT_SYMBOL_BASE(func,ver)
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*
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* For functions that have multiple implementations these macros control
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* symbol export and versioning.
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*
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* Function definitions that exist in only one version never need to use
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* these macros.
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*
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* Backwards compatible implementations must include a version tag of
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* the form "_v1_02_104" as a suffix to the function name and use the
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* macro DM_EXPORT_SYMBOL to export the function and bind it to the
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* specified version string.
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*
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* Since versioning is only available when compiling with GCC the entire
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* compatibility version should be enclosed in '#if defined(__GNUC__)',
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* for example:
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*
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* int dm_foo(int bar)
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* {
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* return bar;
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* }
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*
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* #if defined(__GNUC__)
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* // Backward compatible dm_foo() version 1.02.104
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* int dm_foo_v1_02_104(void);
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* int dm_foo_v1_02_104(void)
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* {
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* return 0;
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* }
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* DM_EXPORT_SYMBOL(dm_foo,1_02_104)
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* #endif
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*
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* A prototype for the compatibility version is required as these
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* functions must not be declared static.
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*
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* The DM_EXPORT_SYMBOL_BASE macro is only used to export the base
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* versions of library symbols prior to the introduction of symbol
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* versioning: it must never be used for new symbols.
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*/
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#if defined(__GNUC__)
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#define DM_EXPORT_SYMBOL(func, ver) \
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__asm__(".symver " #func "_v" #ver ", " #func "@DM_" #ver )
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#define DM_EXPORT_SYMBOL_BASE(func) \
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__asm__(".symver " #func "_base, " #func "@Base" )
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#else
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#define DM_EXPORT_SYMBOL(func, ver)
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#define DM_EXPORT_SYMBOL_BASE(func)
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#endif
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#include "device_mapper/all.h"
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#include "base/memory/zalloc.h"
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#include "lib/misc/intl.h"
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#include "lib/misc/util.h"
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#ifdef DM
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# include "libdm/misc/dm-logging.h"
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#else
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# include "lib/log/lvm-logging.h"
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# include "lib/misc/lvm-globals.h"
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# include "lib/misc/lvm-wrappers.h"
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# include "lib/misc/lvm-maths.h"
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#endif
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#include <unistd.h>
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#endif
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