CXXFLAGS += -DGIT_DATE=$(GIT_DATE)
endif
+### 3.7.3 Try to include architecture
+ifneq ($(ARCH), )
+ CXXFLAGS += -DARCH=$(ARCH)
+endif
+
### 3.8 Link Time Optimization
### This is a mix of compile and link time options because the lto link phase
### needs access to the optimization flags.