--- old/hotspot/make/linux/makefiles/gcc.make 2014-01-07 17:01:01.823069448 -0800 +++ new/hotspot/make/linux/makefiles/gcc.make 2014-01-07 17:01:01.719069443 -0800 @@ -214,7 +214,7 @@ WARNINGS_ARE_ERRORS += -Wno-return-type -Wno-empty-body endif -WARNING_FLAGS = -Wpointer-arith -Wsign-compare -Wundef -Wunused-function -Wunused-value -Wformat=2 -Wextra +WARNING_FLAGS = -Wpointer-arith -Wsign-compare -Wundef -Wunused-function -Wunused-value -Wformat=2 ifeq ($(USE_CLANG),) # Since GCC 4.3, -Wconversion has changed its meanings to warn these implicit