--- old/make/linux/makefiles/rules.make	2019-02-15 19:02:05.867937856 +0300
+++ new/make/linux/makefiles/rules.make	2019-02-15 19:02:05.703943604 +0300
@@ -126,8 +126,8 @@
 RUN.JAR$(MAKE_VERBOSE) += >/dev/null
 
 # Settings for javac
-BOOT_SOURCE_LANGUAGE_VERSION = 6
-BOOT_TARGET_CLASS_VERSION = 6
+BOOT_SOURCE_LANGUAGE_VERSION = 8
+BOOT_TARGET_CLASS_VERSION = 8
 JAVAC_FLAGS = -g -encoding ascii
 BOOTSTRAP_JAVAC_FLAGS = $(JAVAC_FLAGS) -source $(BOOT_SOURCE_LANGUAGE_VERSION) -target $(BOOT_TARGET_CLASS_VERSION)