Bug 557000 - Don't use GCC_VERSION to detect GCC in makefiles. r=ted

config/Makefile.in

@@ -139,12 +139,14 @@ GARBAGE_DIRS += system_wrappers
 endif
 
 ifdef WRAP_STL_INCLUDES
-ifdef GCC_VERSION
+ifdef GNU_CXX
 stl_compiler = gcc
 else
+ifdef _MSC_VER
 stl_compiler = msvc
 endif
 endif
+endif
 
 ifdef stl_compiler
 stl-wrappers-sentinel: $(srcdir)/make-stl-wrappers.py $(srcdir)/$(stl_compiler)-stl-wrapper.template.h $(srcdir)/stl-headers $(GLOBAL_DEPS)

memory/mozalloc/Makefile.in

@@ -80,7 +80,7 @@ CPPSRCS 		=			\
 	$(NULL)
 
 ifdef WRAP_STL_INCLUDES #{
-ifdef GCC_VERSION #{
+ifdef GNU_CXX #{
 EXPORTS_mozilla	+= throw_gcc.h
 else
 ifdef _MSC_VER #{