--- a/make/hotspot/lib/JvmOverrideFiles.gmk	Fri Sep 14 09:16:51 2018 +0200
+++ b/make/hotspot/lib/JvmOverrideFiles.gmk	Thu Sep 13 11:07:40 2018 +0200
@@ -30,7 +30,7 @@
 # status for individual files on specific platforms.
 
 ifeq ($(TOOLCHAIN_TYPE), gcc)
-  BUILD_LIBJVM_vmStructs.cpp_CXXFLAGS := -fno-var-tracking-assignments -O0
+  BUILD_LIBJVM_vmStructs.cpp_CXXFLAGS := -fno-var-tracking-assignments
   BUILD_LIBJVM_jvmciCompilerToVM.cpp_CXXFLAGS := -fno-var-tracking-assignments
   BUILD_LIBJVM_jvmciCompilerToVMInit.cpp_CXXFLAGS := -fno-var-tracking-assignments
   BUILD_LIBJVM_assembler_x86.cpp_CXXFLAGS := -Wno-maybe-uninitialized