--- xdebug-2.0.5.ebuild.old	2009-08-23 13:55:29.000000000 +0200
+++ xdebug-2.0.5.ebuild	2009-08-23 14:45:53.000000000 +0200
@@ -18,7 +18,7 @@
 SRC_URI="http://pecl.php.net/get/${PN}-${MY_PV}.tgz"
 LICENSE="Xdebug"
 SLOT="0"
-IUSE=""
+IUSE="defaulton"
 
 S="${WORKDIR}/${PN}-${MY_PV}"
 
@@ -41,7 +41,11 @@
 	php-ext-base-r1_addtoinifiles "xdebug.collect_params" '"0"'
 	php-ext-base-r1_addtoinifiles "xdebug.collect_return" '"0"'
 	php-ext-base-r1_addtoinifiles "xdebug.collect_vars" '"0"'
-	php-ext-base-r1_addtoinifiles "xdebug.default_enable" '"0"'
+	if use defaulton ; then
+		php-ext-base-r1_addtoinifiles "xdebug.default_enable" '"1"'
+	else
+		php-ext-base-r1_addtoinifiles "xdebug.default_enable" '"0"'
+	fi
 	php-ext-base-r1_addtoinifiles "xdebug.extended_info" '"1"'
 	php-ext-base-r1_addtoinifiles "xdebug.manual_url" '"http://www.php.net"'
 	php-ext-base-r1_addtoinifiles "xdebug.max_nesting_level" '"100"'
@@ -77,3 +81,24 @@
 	php-ext-base-r1_addtoinifiles "xdebug.var_display_max_depth" '"2"'
 	php-ext-base-r1_addtoinifiles "xdebug.var_display_max_children" '"128"'
 }
+
+pkg_postinst() {
+	if ! use defaulton ; then
+		ewarn "Deviating from Xdebug's default setting xdebug.default_enable is set"
+		ewarn "to 0 if not emerged with defaulton USE flag. This is done to prevent"
+		ewarn "Xdebug to become globally enabled if emerged accidentally as a"
+		ewarn "dependency."
+		ewarn " "
+		ewarn "You will have to activate it manually by setting xdebug.default_enable"
+		ewarn "to 1 in php.ini, adding a php_admin_value directive to your vhost or by"
+		ewarn "calling xdebug_enable() in your code."
+		ewarn " "
+		ewarn "If you really intend to activate Xdebug globally you can also reemerge"
+		ewarn "with USE flag 'defaulton'."
+		ewarn " "
+		ewarn "Disabling Xdebug by default has been introduced in ebuild 2.0.5."
+	else
+		ewarn "Xdebug is globally enabled by default - unset USE flag defaulton to"
+		ewarn "prevent this behavior."
+	fi
+}