Merge jamppa@bk-internal.mysql.com:/home/bk/mysql-5.1-new

into  a193-229-222-105.elisa-laajakaista.fi:/home/my/bk/mysql-5.1-new


configure.in:
  Auto merged
sql/mysqld.cc:
  Auto merged
sql/set_var.cc:
  Auto merged

configure.in

@@ -13,7 +13,8 @@ AM_CONFIG_HEADER(config.h)
 PROTOCOL_VERSION=10
 DOT_FRM_VERSION=6
 # See the libtool docs for information on how to do shared lib versions.
-SHARED_LIB_VERSION=15:0:0
+SHARED_LIB_MAJOR_VERSION=15
+SHARED_LIB_VERSION=$SHARED_LIB_MAJOR_VERSION:0:0
 
 # Set all version vars based on $VERSION. How do we do this more elegant ?
 # Remember that regexps needs to quote [ and ] since this is run through m4
@@ -60,6 +61,7 @@ AC_DEFINE_UNQUOTED([PROTOCOL_VERSION], [$PROTOCOL_VERSION],
 AC_SUBST(DOT_FRM_VERSION)
 AC_DEFINE_UNQUOTED([DOT_FRM_VERSION], [$DOT_FRM_VERSION],
                    [Version of .frm files])
+AC_SUBST(SHARED_LIB_MAJOR_VERSION)
 AC_SUBST(SHARED_LIB_VERSION)
 AC_SUBST(AVAILABLE_LANGUAGES)
 
@@ -339,6 +341,13 @@ fi
 
 MYSQL_PROG_AR
 
+# libmysqlclient versioning when linked with GNU ld.
+if $LD --version 2>/dev/null|grep -q GNU; then
+  LD_VERSION_SCRIPT="-Wl,--version-script=\$(top_srcdir)/libmysql/libmysql.ver"
+  AC_CONFIG_FILES(libmysql/libmysql.ver)
+fi
+AC_SUBST(LD_VERSION_SCRIPT)
+
 # Avoid bug in fcntl on some versions of linux
 AC_MSG_CHECKING("if we should use 'skip-locking' as default for $target_os")
 # Any variation of Linux