> > Probably, but you might RTFQ (read the fucking question) too :)
> (NOTE I didn't use RT"F"M out of respect !)

1,$s/RTFQ/RTQ/g

> however you seem
> to only be interested in posts if they answer all 3 of your 
> questions ?

of course, half a solution won't do the job.

> Can you post the makefile so we can see where you are if "not in a
> rule" ?

lines like:

ifndef CRYSTAL 
   error "no CRYSTAL defined in your Makefile"
endif

> You could add another target that all your real target depend on, and
> put your tests in there, and make them return a failure if 
> the required
> conditions aren't met, then make will stop at that point. 

That seems to be my only option so far, but that requires that makes
interprets the whole Makefile, because rule-execution starts only after
full interpretation.

> However, the learning curve for using the automake tools is 
> quite steep,
> and probably not justified for your current problem.

I am trying to make an environment for ARM chips for beginners, so I
don't even want to expose them to make's (full) syntax.

I guess I'd better explain the total picture. I want the user (assume a
student who has programming experience, but only from IDE's) to edit a
small makefile to specify some aspects of his application. The last line
of this makefile include's my makefile, which does all the magic.
Example of the user's makefile:

CHIP        = LPC2106
CRYSTAL     = 10000000
MAIN_STACK  = 4096
IRQ_STACK   = 0
FIQ_STACK   = 0
RUN_FROM    = RAM

include ARK/Makefile.inc

In the ARK/Makefile.inc I want to check the users settings for
completeness and consistency. He might have defined a non-existing
target, misspelled CRYSTL, or specified a negative IRQ_STACK size. I can
write the if's that do this checking, but I don't know what to put
inside the if's to 
1. generate an error
2. stop make, without interpreting the rest of the file

I think I can create something that would generate an error and stop
make, but as part of a rule, so that would work only after make has
interpreted the full makefile, which might produce other errors because
the user's specs where wrong.

Wouter van Ooijen

-- -------------------------------------------
Van Ooijen Technische Informatica: www.voti.nl
consultancy, development, PICmicro products
docent Hogeschool van Utrecht: www.voti.nl/hvu
 


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