Don't guess basedir in mysql_config; we place it under _libdir because
of multilib conflicts, so use rather configured @prefix@ path directly.
diff -up mariadb-5.5.39/scripts/mysql_config.sh.p14 mariadb-5.5.39/scripts/mysql_config.sh
--- mariadb-5.5.39/scripts/mysql_config.sh.p14 2014-08-22 17:04:41.258563756 +0200
+++ mariadb-5.5.39/scripts/mysql_config.sh 2014-08-22 17:05:23.197648131 +0200
@@ -77,7 +77,7 @@ get_full_path ()
me=`get_full_path $0`
# Script might have been renamed but assume mysql_<something>config<something>
-basedir=`echo $me | sed -e 's;/bin/mysql_.*config.*;;'`
+basedir='@prefix@'
ldata='@localstatedir@'
execdir='@libexecdir@'