--- configure.orig	2013-10-30 11:38:52.000000000 -0200
+++ configure	2013-10-30 11:39:25.000000000 -0200
@@ -975,7 +975,7 @@
 done
 
       # Check whether --enable-mysql or --disable-mysql was given.
-if test "${enable_mysql+set}" = set; then
+if test "${enable_mysql}" = "yes"; then
   enableval="$enable_mysql"
   
 	for ac_hdr in mysql/mysql.h