Upper/Lower case

[Ropars Katell-R59913]

Hello,

I have some questions regarding GNU make:

1.
I would like to define a variable in a makefile that can either be read as 
lower or upper case.

I tried:

NAME_1 = DUMMY
NAME_1_LOWER_CASE = $(subst %,"%",$(NAME_1))
I was expecting to read "dummy" but it is not the case.


2.
I am using recursive make rules and if an error is encountered I would like to 
give up the current rule and all the other rules. It is written in the manual : 
"If there is an error (the exit status is nonzero), make gives up on the 
current rule, and perhaps on all rules." How could I force all the rules to 
stop?

Thanks for your reply.
Regards,
Katell ROPARS