--- a/include/functions.mk
+++ b/include/functions.mk
@@ -26,3 +26,7 @@
 cc-disable-warning = $(call try-run,\
 	$(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) -W$(strip $(1)) -c -x c /dev/null -o "$$TMP",-Wno-$(strip $(1)))

+# cc-disable-flag
+# Usage: cflags-y += $(call cc-disable-flag,sized-deallocation)
+cc-disable-flag = $(call try-run,\
+	$(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) -f$(strip $(1)) -c -x c /dev/null -o "$$TMP",-fno-$(strip $(1)))
--- a/linutil/Makefile
+++ b/linutil/Makefile
@@ -165,6 +165,7 @@
 CXXFLAGS += -Wno-reorder -fcheck-new -fno-enforce-eh-specs
 # 4.8+
 CXXFLAGS += $(call cc-disable-warning,unused-local-typedefs)
+CXXFLAGS += $(call cc-disable-flag,sized-deallocation)
 MSGFILE  = linutil.pot
 XGTGLAGS = --keyword=_:1 -o$(O)/$(MSGFILE) -j --no-location