3 files changed, 110 insertions, 0 deletions
diff --git a/src/spdk/dpdk/lib/librte_compat/Makefile b/src/spdk/dpdk/lib/librte_compat/Makefile
new file mode 100644
index 00000000..61089fe7
--- /dev/null
+++ b/src/spdk/dpdk/lib/librte_compat/Makefile
@@ -0,0 +1,13 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright(c) 2013 Neil Horman <nhorman@tuxdriver.com>
+# All rights reserved.
+
+include $(RTE_SDK)/mk/rte.vars.mk
+
+
+LIBABIVER := 1
+
+# install includes
+SYMLINK-y-include := rte_compat.h
+
+include $(RTE_SDK)/mk/rte.install.mk
diff --git a/src/spdk/dpdk/lib/librte_compat/meson.build b/src/spdk/dpdk/lib/librte_compat/meson.build
new file mode 100644
index 00000000..82c7eea5
--- /dev/null
+++ b/src/spdk/dpdk/lib/librte_compat/meson.build
@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright(c) 2017 Intel Corporation
+
+
+install_headers('rte_compat.h')
+
+set_variable('dep_rte_compat',
+	declare_dependency(include_directories: include_directories('.')))
diff --git a/src/spdk/dpdk/lib/librte_compat/rte_compat.h b/src/spdk/dpdk/lib/librte_compat/rte_compat.h
new file mode 100644
index 00000000..3ffaa9e6
--- /dev/null
+++ b/src/spdk/dpdk/lib/librte_compat/rte_compat.h
@@ -0,0 +1,89 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2015 Neil Horman <nhorman@tuxdriver.com>.
+ * All rights reserved.
+ */
+
+#ifndef _RTE_COMPAT_H_
+#define _RTE_COMPAT_H_
+#include <rte_common.h>
+
+#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
+ * <library>_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 <b>@DPDK_<n> to the internal
+ * function name <b>_<e>
+ */
+#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 <b> to the internal symbol <b>_<e>
+ */
+#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
+
+#define __rte_experimental  __attribute__((deprecated)) __attribute__((section(".text.experimental")))
+#else
+
+#define __rte_experimental \
+__attribute__((section(".text.experimental")))
+
+#endif
+
+#endif /* _RTE_COMPAT_H_ */