Re: Preprocessing files with make

[Colin S. Miller]

> Thanks for the reply but perhaps I was a little unclear. The problem I have is 
> to make the rule to preprocess the files. 
>
> E.i what i want is this
> source/dir1/source.c -> preprocessed/source.d
>
> The easy party is to construct a variable wich contain the source files
> and preprocessed files but i dont know how to use them.
>
> I hope my intent is clear now. I think this is a trivial task for someone 
> with a great knowledge of make then I have.
>
> Thanks,
> Erik

Make isn't concerned about what format
the source files are in, you
neeed to know how to make gcc (or compiler
of your choice) preprocess a C file,
but not compile it. For gcc it's the
'-E' option.

The following makefile should work ( '.i' is
gcc's prefered extension for preprocessed files,
not '.d' )

#Start example makefile

ALL: foo

foo.i: foo.c
    gcc -E -o foo.i foo.c

foo.o: foo.i
    gcc -c -o foo.o foo.i

foo: foo.o
    gcc -o foo foo.o

#end example makefile



HTH,
Colin S. Miller