make/bsd/makefiles/gcc.make

rev 10160 : 8144695: --disable-warnings-as-errors does not work for HotSpot build
Reviewed-by: duke

@@ -254,11 +254,11 @@
   CFLAGS += -pipe
 endif
 
 # Compiler warnings are treated as errors
 ifneq ($(COMPILER_WARNINGS_FATAL),false)
-  WARNINGS_ARE_ERRORS = -Werror
+  WARNINGS_ARE_ERRORS ?= -Werror
 endif
 
 ifeq ($(USE_CLANG), true)
   # However we need to clean the code up before we can unrestrictedly enable this option with Clang
   WARNINGS_ARE_ERRORS += -Wno-logical-op-parentheses -Wno-parentheses-equality -Wno-parentheses