Makefile Includes Remake ? / files .d dependencies

[Peter Biechele]

Hello !

I have two problems, which I could not solve with the help of the manual 
(although, I am pretty sure there is something in there, but i did not 
understand).

(first of all: all my questions are about C programs)

1) I have used an implicit rule for producing %.d files from .c files like 
described in the GNU Make manual. This works fine, but it ALWAYS produces .d 
files, although I have changed only ONE c-file. Does it have to be this way, 
or can I avoid producing all .d files ?? 
By the way I am using "vpath %d DEPENDDIR" and "vpath %c .......", so make is 
able to find the .d files to check if they have to be remade.


2) I have split up the makefile into one main Makefile and 5 included 
MAkefiles to seperate settings for paths, flags, etc. in seperate files. Now 
I want to make sure, if someone changes ONE of the Makefiles, I want to 
remake everything ! This means I would like to call "make realclean" and then 
"make all", if one of the Makefiles have changed !! (This is because, if 
someone changes a define I have to recompile everything).
Is there an easy solution ???



Thank you very much for any help !

Best Regards 
Peter Biechele, Germany

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