From 272a1ae190eca07c33fa4bff432669da5c981b24 Mon Sep 17 00:00:00 2001
From: Guy Lichtman <guy@guylichtman.com>
Date: Sat, 20 Dec 2014 20:29:36 +0200
Subject: [PATCH] added special variable named
 audit_plugin_version_<version>_<revision> where '.' is repalced with '_'.
 This variable can be used to extract the version of the plugin by using a
 tool such as nm or objdump. issue #96.

---
 configure.ac        |  7 ++++++-
 src/audit_plugin.cc | 10 ++++++++++
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index a2dbf86..5c7475a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -116,12 +116,17 @@ fi
 if test -z "$MYSQL_AUDIT_PLUGIN_REVISION" ;then
 	MYSQL_AUDIT_PLUGIN_REVISION=99999
 fi
+if test -z "$MYSQL_AUDIT_PLUGIN_SYMBOL_VERSION" ;then
+        MYSQL_AUDIT_PLUGIN_SYMBOL_VERSION=${MYSQL_AUDIT_PLUGIN_VERSION//./_}_$MYSQL_AUDIT_PLUGIN_REVISION
+fi
+
 
 AC_SUBST(MYSQL_AUDIT_PLUGIN_VERSION)
 AC_SUBST(MYSQL_AUDIT_PLUGIN_REVISION)
-echo "Version: $MYSQL_AUDIT_PLUGIN_VERSION-$MYSQL_AUDIT_PLUGIN_REVISION"
+echo "Version: $MYSQL_AUDIT_PLUGIN_VERSION-$MYSQL_AUDIT_PLUGIN_REVISION Symbol version: $MYSQL_AUDIT_PLUGIN_SYMBOL_VERSION"
 CPPFLAGS="$CPPFLAGS -DMYSQL_AUDIT_PLUGIN_VERSION='\"$MYSQL_AUDIT_PLUGIN_VERSION\"'"
 CPPFLAGS="$CPPFLAGS -DMYSQL_AUDIT_PLUGIN_REVISION='\"$MYSQL_AUDIT_PLUGIN_REVISION\"'"
+CPPFLAGS="$CPPFLAGS '-DMYSQL_AUDIT_PLUGIN_SYMBOL_VERSION()=extern const char audit_plugin_version_$MYSQL_AUDIT_PLUGIN_SYMBOL_VERSION'"
 
 
 #subst the relevant variables
diff --git a/src/audit_plugin.cc b/src/audit_plugin.cc
index 95ae36a..681a766 100644
--- a/src/audit_plugin.cc
+++ b/src/audit_plugin.cc
@@ -1797,3 +1797,13 @@ extern "C" int __cxa_pure_virtual (void)
 		log_prefix);
 	return 0;
 }
+
+/*
+ * Variable to hold version
+ */
+MYSQL_AUDIT_PLUGIN_SYMBOL_VERSION() = '\0';
+
+
+
+
+