Hello,
We use slightly modified rboot and we would like to define preprocessor variable used in rboot.c during firmware building.
We have tried to modify rboot.mk and add CFLAGS += -DFOO=${FOO} and run mos tool as FOO=\"bar\" mos build ... but it says:
rboot.mk:63: warning: undefined variable 'FOO'
It would be even better if we could use build_vars for this.
Is it possible?