X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=lib%2Flibrte_eal%2Fcommon%2Finclude%2Frte_compat.h;h=3eb33784b31d40a4f05fc14f9da2606106af0984;hb=df3ff6be2b33faea3edf3c112b9bdc5b74d6f684;hp=92ff28faf8e6656d6b2b6995cc7bd0d1bd82820f;hpb=b543d1a71535cb76bd87069b30c3d481ebd8c2a8;p=dpdk.git diff --git a/lib/librte_eal/common/include/rte_compat.h b/lib/librte_eal/common/include/rte_compat.h index 92ff28faf8..3eb33784b3 100644 --- a/lib/librte_eal/common/include/rte_compat.h +++ b/lib/librte_eal/common/include/rte_compat.h @@ -5,76 +5,6 @@ #ifndef _RTE_COMPAT_H_ #define _RTE_COMPAT_H_ -#include - -#ifdef RTE_BUILD_SHARED_LIB - -/* - * Provides backwards compatibility when updating exported functions. - * When a symol is exported from a library to provide an API, it also provides a - * calling convention (ABI) that is embodied in its name, return type, - * arguments, etc. On occasion that function may need to change to accommodate - * new functionality, behavior, etc. When that occurs, it is desirable to - * allow for backwards compatibility for a time with older binaries that are - * dynamically linked to the dpdk. To support that, the __vsym and - * VERSION_SYMBOL macros are created. They, in conjunction with the - * _version.map file for a given library allow for multiple versions of - * a symbol to exist in a shared library so that older binaries need not be - * immediately recompiled. - * - * Refer to the guidelines document in the docs subdirectory for details on the - * use of these macros - */ - -/* - * Macro Parameters: - * b - function base name - * e - function version extension, to be concatenated with base name - * n - function symbol version string to be applied - * f - function prototype - * p - full function symbol name - */ - -/* - * VERSION_SYMBOL - * Creates a symbol version table entry binding symbol @DPDK_ to the internal - * function name _ - */ -#define VERSION_SYMBOL(b, e, n) __asm__(".symver " RTE_STR(b) RTE_STR(e) ", " RTE_STR(b) "@DPDK_" RTE_STR(n)) - -/* - * BIND_DEFAULT_SYMBOL - * Creates a symbol version entry instructing the linker to bind references to - * symbol to the internal symbol _ - */ -#define BIND_DEFAULT_SYMBOL(b, e, n) __asm__(".symver " RTE_STR(b) RTE_STR(e) ", " RTE_STR(b) "@@DPDK_" RTE_STR(n)) -#define __vsym __attribute__((used)) - -/* - * MAP_STATIC_SYMBOL - * If a function has been bifurcated into multiple versions, none of which - * are defined as the exported symbol name in the map file, this macro can be - * used to alias a specific version of the symbol to its exported name. For - * example, if you have 2 versions of a function foo_v1 and foo_v2, where the - * former is mapped to foo@DPDK_1 and the latter is mapped to foo@DPDK_2 when - * building a shared library, this macro can be used to map either foo_v1 or - * foo_v2 to the symbol foo when building a static library, e.g.: - * MAP_STATIC_SYMBOL(void foo(), foo_v2); - */ -#define MAP_STATIC_SYMBOL(f, p) - -#else -/* - * No symbol versioning in use - */ -#define VERSION_SYMBOL(b, e, n) -#define __vsym -#define BIND_DEFAULT_SYMBOL(b, e, n) -#define MAP_STATIC_SYMBOL(f, p) f __attribute__((alias(RTE_STR(p)))) -/* - * RTE_BUILD_SHARED_LIB=n - */ -#endif #ifndef ALLOW_EXPERIMENTAL_API