CXXFLAGS = @CXXFLAGS@
CXXCPP = @CXXCPP@
INCLUDES = -I../include -I$(top_srcdir)/include
-CPPFLAGS += $(INCLUDES)
+override CPPFLAGS += $(INCLUDES)
LIBS = @LIBS@
LIBTOOL = @LIBTOOL@
LIBTOOL_COMPILE = $(LIBTOOL) --mode=compile
# Add subdirectory specific flags.
include $(srcdir)/$(SUBDIR)/Makeflags
-CPPFLAGS += $(SUBDIR_INCLUDES)
+override CPPFLAGS += $(SUBDIR_INCLUDES)
# Need to know the system name.
SYSTEM := $(shell uname -s)