Makefile structure

[John Pickwick]

Hi,
a general question about the makefile structure logic in RTEMS.
I want to define a macro in all my compilation directives. I use RTEMS4.7.1 with Cygwin/Eclipse and the associated makefile structure (folders and leafs makefile with one final executable).
What is the recommended way to do that ?
I defined a "CMYFLAGS=xxxxxx" in the make command line but then I need to add it ($(CMYFLAGS)) in CFLAGS in all the makefiles that must use it.

Is there a better way to do that ?

Best regards,

John.
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