--- a/hotspot/make/linux/makefiles/gcc.make	Thu Oct 08 01:04:29 2015 +0000
+++ b/hotspot/make/linux/makefiles/gcc.make	Fri Oct 02 11:46:42 2015 +0200
@@ -207,18 +207,22 @@
   WARNINGS_ARE_ERRORS += -Wno-return-type -Wno-empty-body
 endif
 
-WARNING_FLAGS = -Wpointer-arith -Wsign-compare -Wundef -Wunused-function -Wunused-value -Wformat=2 -Wreturn-type -Woverloaded-virtual -Wno-format-zero-length
+WARNING_FLAGS = -Wpointer-arith -Wsign-compare -Wundef -Wunused-function -Wunused-value -Wformat=2 -Wreturn-type -Woverloaded-virtual
 
 ifeq ($(USE_CLANG),)
   # Since GCC 4.3, -Wconversion has changed its meanings to warn these implicit
   # conversions which might affect the values. Only enable it in earlier versions.
   ifeq "$(shell expr \( $(CC_VER_MAJOR) \> 4 \) \| \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) \>= 3 \) \))" "0"
+    # GCC < 4.3
     WARNING_FLAGS += -Wconversion
   endif  
   ifeq "$(shell expr \( $(CC_VER_MAJOR) \> 4 \) \| \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) \>= 8 \) \))" "1"
+    # GCC >= 4.8
     # This flag is only known since GCC 4.3. Gcc 4.8 contains a fix so that with templates no
     # warnings are issued: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=11856
     WARNING_FLAGS += -Wtype-limits
+    # GCC < 4.8 don't accept this flag for C++.
+    WARNING_FLAGS += -Wno-format-zero-length
   endif
 endif