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lib: remove unused macros

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Internally lvm2 is not using versioning for device-mapper.
This commit is contained in:
Zdenek Kabelac 2021-04-03 21:25:26 +02:00
parent e86cd9c5ba
commit b99f7d0df9
1 changed files with 0 additions and 54 deletions
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54
lib/misc/lib.h
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@ -19,60 +19,6 @@
#ifndef _LVM_LIB_H
#define _LVM_LIB_H
/*
* Symbol export control macros
*
* DM_EXPORT_SYMBOL(func,ver)
* DM_EXPORT_SYMBOL_BASE(func,ver)
*
* For functions that have multiple implementations these macros control
* symbol export and versioning.
*
* Function definitions that exist in only one version never need to use
* these macros.
*
* Backwards compatible implementations must include a version tag of
* the form "_v1_02_104" as a suffix to the function name and use the
* macro DM_EXPORT_SYMBOL to export the function and bind it to the
* specified version string.
*
* Since versioning is only available when compiling with GCC the entire
* compatibility version should be enclosed in '#if defined(GNU_SYMVER)',
* for example:
*
* int dm_foo(int bar)
* {
* return bar;
* }
*
* #if defined(__GNUC__)
* // Backward compatible dm_foo() version 1.02.104
* int dm_foo_v1_02_104(void);
* int dm_foo_v1_02_104(void)
* {
* return 0;
* }
* DM_EXPORT_SYMBOL(dm_foo,1_02_104)
* #endif
*
* A prototype for the compatibility version is required as these
* functions must not be declared static.
*
* The DM_EXPORT_SYMBOL_BASE macro is only used to export the base
* versions of library symbols prior to the introduction of symbol
* versioning: it must never be used for new symbols.
*/
#if defined(GNU_SYMVER)
#define DM_EXPORT_SYMBOL(func, ver) \
__asm__(".symver " #func "_v" #ver ", " #func "@DM_" #ver )
#define DM_EXPORT_SYMBOL_BASE(func) \
__asm__(".symver " #func "_base, " #func "@Base" )
#else
#define DM_EXPORT_SYMBOL(func, ver)
#define DM_EXPORT_SYMBOL_BASE(func)
#endif
#include "device_mapper/all.h"
#include "base/memory/zalloc.h"
#include "lib/misc/intl.h"