[En-Nut-Discussion] Trouble with nutconf and 'nut' subdirectory + make question

[Bernard Fouché]

Christian.Schilmoeller at camco.de wrote:

>I've had the problem with the disappearing *.elf-files, too. The "rm" 
>command is found nowhere in the makefile, but nevertheless "make" performs 
>this delete operation. The reason for this is that "make" regards the 
>*.elf-file as a temporary one, not as a target of the build process. IIRC, 
>I solved this problem by copying the line that generates the *.elf-file 
>into the section that lists the targets (the *.hex-file is also found 
>there). The changes must be applied to a file named "Makerules" found in 
>the Ethernut directory.
>I'm not 100% sure about this, just to give you a hint. Unfortunately, the 
>make manual is a big chunk... I've also read something about the PRECIOUS 
>keyword that does something similar (preserves files that would be deleted 
>otherwise).
>  
>
I've seen that calling make with '-r' will drop implicit rules (these 
are the rules that we want make not
to use). 'info make' gives a lot of details, I think that some variables 
allow twicking the behavior of such
and such rules but once I found '-r', and since all Ethernut makefiles 
redefine all needed rules, I stopped
my quest at that moment ;-)

  Bernard