--- a/make/hotspot/lib/JvmFlags.gmk	Thu Sep 20 22:01:12 2018 +0200
+++ b/make/hotspot/lib/JvmFlags.gmk	Thu Oct 17 11:07:24 2019 +0200
@@ -74,7 +74,7 @@
   endif
 else ifeq ($(DEBUG_LEVEL), fastdebug)
   JVM_CFLAGS_DEBUGLEVEL := -DASSERT
-  ifeq ($(filter $(OPENJDK_TARGET_OS), windows aix), )
+  ifeq ($(call isTargetOs, windows aix), false)
     # NOTE: Old build did not define CHECK_UNHANDLED_OOPS on Windows and AIX.
     JVM_CFLAGS_DEBUGLEVEL += -DCHECK_UNHANDLED_OOPS
   endif
@@ -95,3 +95,7 @@
 ifeq ($(USE_PRECOMPILED_HEADER), false)
   JVM_CFLAGS += -DDONT_USE_PRECOMPILED_HEADER
 endif
+
+ifneq ($(HOTSPOT_OVERRIDE_LIBPATH), )
+  JVM_CFLAGS += -DOVERRIDE_LIBPATH='"$(HOTSPOT_OVERRIDE_LIBPATH)"'
+endif