implement bug 379497

phase-helpers.sh.patch

--- phase-helpers.sh
+++ phase-helpers.sh
@@ -420,13 +420,20 @@
 			done
 		fi
 
-		# EAPI=4 adds --disable-dependency-tracking to econf
-		if ! has "$EAPI" 0 1 2 3 3_pre2 && \
-			"${ECONF_SOURCE}/configure" --help 2>/dev/null | \
-			grep -q disable-dependency-tracking ; then
-			set -- --disable-dependency-tracking "$@"
-		fi
-
+		conf_help=$("${ECONF_SOURCE}/configure" --help 2>/dev/null)
+
+		case ${conf_help} in
+			# make build log verbose by default
+			*--disable-silent-rules*)
+				set -- --disable-silent-rules "$@";;
+		esac
+		case ${conf_help} in
+			# EAPI=4 adds --disable-dependency-tracking to econf
+			*--disable-dependency-tracking*)
+				! has "$EAPI" 0 1 2 3 3_pre2 &&
+					set -- --disable-dependency-tracking "$@";;
+		esac
+		
 		# if the profile defines a location to install libs to aside from default, pass it on.
 		# if the ebuild passes in --libdir, they're responsible for the conf_libdir fun.
 		local CONF_LIBDIR LIBDIR_VAR="LIBDIR_${ABI}"