-$(error This application can only operate in a x86_64 environment, \
-please change the definition of the RTE_TARGET environment variable)
+ ifneq ($(LBITS),i686)
+ $(error The RTE_TARGET chosen is not compatible with this environment \
+ (x86_64), for this application. Please change the definition of the \
+ RTE_TARGET environment variable, or run the application on a 32-bit OS)
+ endif