--- old/make/linux/makefiles/top.make	2020-01-16 16:56:26.459596031 +0300
+++ new/make/linux/makefiles/top.make	2020-01-16 16:56:26.411597579 +0300
@@ -79,8 +79,10 @@
 default: vm_build_preliminaries the_vm
 	@echo All done.
 
+Jfr_Stuff_If_Required = $(if $(findstring true,$(ENABLE_JFR)),jfr_stuff,)
+
 # This is an explicit dependency for the sake of parallel makes.
-vm_build_preliminaries:  checks $(Cached_plat) $(AD_Files_If_Required) jvmti_stuff jfr_stuff sa_stuff
+vm_build_preliminaries:  checks $(Cached_plat) $(AD_Files_If_Required) jvmti_stuff $(Jfr_Stuff_If_Required) sa_stuff
 	@# We need a null action here, so implicit rules don't get consulted.
 
 $(Cached_plat): $(Plat_File)