-B$$r/$(HOST_SUBDIR)/prev-gcc/ -B$(build_tooldir)/bin/ -nostdinc++ \
-B$$r/prev-$(TARGET_SUBDIR)/libstdc++-v3/src/.libs \
-B$$r/prev-$(TARGET_SUBDIR)/libstdc++-v3/libsupc++/.libs \
- -I$$r/prev-$(TARGET_SUBDIR)/libstdc++-v3/include/$(TARGET_SUBDIR) \
- -I$$r/prev-$(TARGET_SUBDIR)/libstdc++-v3/include \
- -I$$s/libstdc++-v3/libsupc++ \
+ `if $(LEAN); then echo ' -isystem '; else echo ' -I'; fi`$$r/prev-$(TARGET_SUBDIR)/libstdc++-v3/include/$(TARGET_SUBDIR) \
+ `if $(LEAN); then echo ' -isystem '; else echo ' -I'; fi`$$r/prev-$(TARGET_SUBDIR)/libstdc++-v3/include \
+ `if $(LEAN); then echo ' -isystem '; else echo ' -I'; fi`$$s/libstdc++-v3/libsupc++ \
-L$$r/prev-$(TARGET_SUBDIR)/libstdc++-v3/src/.libs \
-L$$r/prev-$(TARGET_SUBDIR)/libstdc++-v3/libsupc++/.libs"; \
export CXX; \