From f2ecf617bab221cf6baa05161fb6438d23722e56 Mon Sep 17 00:00:00 2001
From: Jason Volk <jason@zemos.net>
Date: Mon, 3 Dec 2018 12:30:59 -0800
Subject: [PATCH] ircd::db: Stub a place to put the runtime loaded library
 version information.

---
 include/ircd/db/db.h |  8 ++++++++
 ircd/db.cc           | 21 +++++++++++++++++++++
 2 files changed, 29 insertions(+)

diff --git a/include/ircd/db/db.h b/include/ircd/db/db.h
index 3f8b9673e..3eef3b125 100644
--- a/include/ircd/db/db.h
+++ b/include/ircd/db/db.h
@@ -74,8 +74,15 @@ namespace ircd::db
 //
 namespace ircd::db
 {
+	// Version information from rocksdb headers (when building ircd).
 	extern const uint version[3];
 	extern const string_view version_str;
+
+	// Version of the RocksDB shared library (when running ircd).
+	extern const uint abi_version[3];
+	extern const string_view abi_version_str;
+
+	// Supported compressions (detected when running ircd)
 	extern std::array<std::string, 16> compressions;
 
 	// Utils for "name:checkpoint" string amalgam
@@ -86,6 +93,7 @@ namespace ircd::db
 	std::string path(const string_view &name, const uint64_t &checkpoint);
 	std::string path(const string_view &name);
 
+	// Paths of available databases.
 	std::vector<std::string> available();
 }
 
diff --git a/ircd/db.cc b/ircd/db.cc
index 60ef09e6d..98b69f725 100644
--- a/ircd/db.cc
+++ b/ircd/db.cc
@@ -152,6 +152,27 @@ ircd::db::version_str
 	           version[2])
 );
 
+decltype(ircd::db::abi_version)
+ircd::db::abi_version
+{
+	//TODO: Get lib version.
+	0,
+	0,
+	0,
+};
+
+char ircd_db_abi_version_str_buf[64];
+decltype(ircd::db::abi_version_str)
+ircd::db::abi_version_str
+(
+	ircd_db_abi_version_str_buf,
+	::snprintf(ircd_db_abi_version_str_buf, sizeof(ircd_db_abi_version_str_buf),
+	           "%u.%u.%u",
+	           abi_version[0],
+	           abi_version[1],
+	           abi_version[2])
+);
+
 //
 // init::init
 //